GRUPO 
DE TÉCNICAS 
COMPUTACIONALES
EN LA INGENIERÍA

UNIVERSIDAD de  MÁLAGA
COMPUTATIONAL TECHNIQUES IN ENGINEERING RESEARCH TEAM
MÁLAGA UNIVERSITY

 

Chorros Líquidos Anulares (Annular Liquid Jets)

Annular liquid jets are thin sheets of liquid falling under gravity which, under certain conditions, merge in the centerline to become round liquidjets (Figure 1). The volume enclosed by annular liquid jets has been proposed as a chemical reactor for scrubbing of radioactive and non-radioactive materials, burning of toxic wastes, reduction of zirconium from zirconium tetrachloride and sodium, etc., because the liquid jet contains the reaction and the gases generated in, for example, the combustion of toxic wastes may be absorbed by the liquid which may be collected, purified and recycled so that the combustion-generated gases do not flow through the jet's outer interface and, therefore, do not pollute the environment.

Figure 1. Schematic of an annular liquid jet

Most previous studies of annular liquid jets have been concerned with the analysis of their fluid dynamics and heat/mass transfer under steady state conditions by assuming that the axial velocity component of the liquid is governed by Torricelli's free-fall formula since the geometry of the jet is curvilinear. Moreover, studies on mass transfer in annular liquid jets have taken profit of the fact that the binary diffusion coefficient of gases in liquids is much smaller than that of gases; as a consequence, mass absorption by annular liquid jets is a rather slow process, and the decrease or growth that the volume enclosed by the annular liquid jet experiences due to the mass absorbed by the liquid is mainly controlled by the mass of the gases generated by the combustion of toxic wastes.

When the volume enclosed by annular liquid jets is used to burn toxic wastes, in addition to the absorption of the gaseous combustion products by the liquid, one must account for the heat exchanges between this volume and the jet. However, since the heat diffusion coefficient in the liquid is much larger than the mass diffusion coefficient of the gases absorbed by the liquid, it is to be expected that liquid jet absorb the heat at a faster rate than the gaseous combustion products and, as a consequence, the combustion of toxic wastes in the volume enclosed by annular liquid jets is characterized by four time scales: the characteristic residence time which depends on the liquid volumetric flow rate, the characteristic reaction time, and the characteristic times for heat and mass absorption by the liquid. Since the latter is much larger than the other three, one may assume that mass absorption is a quasi-steady phenomenon. Moreover, if the liquid does not absorb the heat at a sufficiently large rate, the heating of the gases enclosed by the annular jet will increase their temperature, pressure and volume; therefore, under these conditions, the curvilinear geometry of the annular liquid jet will be a function of time. We are thus faced with a free-surface problem, i.e., the annular liquid jet, which affects and is affected by the combustion of the toxic wastes that it encloses.
 
 
 


Miembros del Grupo (Team Members)

 

Publicaciones (PAPERS)


Libros (Books)

    J. I. Ramos, "Modelli Termodinamici dei Motori ad Accensione Commandata e Diesel,"  Dipartimento di Ingegneria Meccanica, II Universita di Roma "Tor Vergata," Roma, Italia, Mayo 1988. (v+238 pp). (El texto del libro está escrito en inglés).
    J. I. Ramos, Internal  Combustion  Engine  Modeling,  Hemisphere  Publishing  Corporation, New York, 1989. (xiv+422 pp).

Vuelta al índice  Vuelta al índice Publicaciones


Capítulos de libros (Chapters in books)

    J. I. Ramos, "Finite Element Methods for One-Dimensional Flame Propagation Problems," Numerical Modeling in Combustion,  editado por T. J. Chung, Capítulo 1, pp. 3-131, Taylor & Francis, Washington, D.C., 1993.  (Invitado).
    J. I. Ramos, "Finite Difference Methods for Turbulent Chemically Reacting Flows,"  Numerical Modeling in Combustion, editado por T. J. Chung, Capítulo 5, pp. 281-373, Taylor & Francis, Washington, D.C., 1993.  (Invitado).

Vuelta al índice  Vuelta al índice Publicaciones


Artículos en Revistas Internacionales (Papers in Journals)

    J. I. Ramos, "Finite Element Methods for One-Dimensional Combustion Problems," International Journal for Numerical Methods in Fluids, Vol. 11, No. 6, pp. 893–906, 1990.  (Invitado).
    J. I. Ramos, N. S. Winowich, "Finite Difference and Finite Element Methods for MHD Channel Flows," International Journal for Numerical Methods in Fluids, Vol. 11, No. 6, pp. 907–934, 1990.  (Invitado).
    J. I. Ramos, "Analytical, Asymptotic and Numerical Studies of Liquid Curtains, and Comparisons with Experimental Data," Applied Mathematical Modelling, Vol. 14, No. 4, pp. 170–183, 1990.
    J. I. Ramos, R. Pitchumani, "Liquid Curtains-II. Gas Absorption," Chemical Engineering Science, Vol. 45, No. 6, pp. 1595–1604, 1990.
    J. I. Ramos, "Annular Liquid Jets in Zero Gravity," Applied Mathematical Modelling, Vol. 14, No. 12, pp. 630–640, 1990.
Vuelta al índice  Vuelta al índice Publicaciones
   J. I. Ramos, "Dynamic Response of Liquid Curtains to Time-Dependent Pressure Fluctuations," Applied Mathematical Modelling, Vol. 15, No. 3, pp. 126–135, 1991.
    J. I. Ramos, R. Pitchumani, "Dynamics of Liquid Membranes. I: Non-Adaptive Finite Difference Methods," International Journal for Numerical Methods in Fluids, Vol. 12, No. 9, pp. 859-879, 1991.
    J. I. Ramos, "Dynamics of Liquid Membranes. II: Adaptive Finite Difference Methods," International Journal for Numerical Methods in Fluids, Vol. 12, No. 9, pp. 881-894, 1991.
    J. I. Ramos, "Mass Absorption by Annular Liquid Jets: I. Analytical and Numerical Studies using the von Mises Transformation", International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 1, No. 2, pp. 99-120, 1991. (Invitado).
    J. I. Ramos, "Mass Absorption by Annular Liquid Jets: II. Analytical and Numerical Studies using a Linear Mapping", International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 1, No. 2, pp. 121-141, 1991. (Invitado).
    J. I. Ramos, "Adaptive and Nonadaptive Hermitian Operator Methods for Combustion Phenomena", Computer Methods in Applied Mechanics and Engineering, Vol. 90, pp. 609-630, 1991.
    J. I. Ramos, J. Falgueras, "Response of Annular Liquid Jets to Mass Loading", Computational Mechanics, Vol. 9, No. 1, pp. 1-16, 1991.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos, "Mass Absorption by Annular Liquid Jets: III. Numerical Studies of Jet Collapse", International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 2, No. 1, pp. 21-36, 1992. (Invitado).
    J. I. Ramos, J. Falgueras, "Oscillating Annular Liquid Membranes", Archive of Applied Mechanics, Vol. 62, pp. 43-52, 1992.
    J. I. Ramos, "Adaptive Finite Difference Methods for Liquid Membranes", International Journal for Numerical Methods in Engineering, Vol. 34, No. 3, pp. 823-836, 1992.
    J. I. Ramos, "Adaptive Block-Implicit Methods for Annular Liquid Jets", Applied Mathematical Modelling, Vol. 16, pp. 464-475, 1992.
    J. I. Ramos, "Annular  Liquid Jets: Formulation and Steady State Analysis", Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 72, No. 11, pp. 565-589, 1992.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos, "Domain-Adaptive Finite Difference Methods for Collapsing Annular Liquid Jets,"Computational Mechanics: An International Journal, Vol. 11, No. 1, pp. 28-64,1993.
    J. I. Ramos, "Adaptive Methods of Lines for One-Dimensional Reaction-Diffusion Equations," International Journal for Numerical Methods in Fluids,  Vol. 16, No. 8, pp. 697-723, 30 April 1993.
Vuelta al índice  Vuelta al índice Publicaciones
    I. Molina-Fernández, C. Camacho-Peñalosa and J. I. Ramos, "Application of the Two-Dimensional Fourier Transform to Nonlinear Wave Propagation Phenomena," IEEE Transactions on Microwave Theory and Techniques, Vol. 42, No. 6, pp. 1079-1085, 1994.
    J. I. Ramos and F. R. Villatoro, "Forces on Solitons in Finite, Nonlinear, Planar Waveguides," Microwave and Optical Technology Letters, Vol. 7, No. 8, pp. 378-381, 1994.
    J. I. Ramos and F. R. Villatoro, "A Quantum Mechanics Analogy for the Nonlinear Shrödinger Equation in the Finite Line," Computers & Mathematics with Applications: An International Journal,  Vol. 28, No. 4, p. 3-17, 1994.
    J. I. Ramos and F. R. Villatoro, "Classical Forces on Solitons in Finite and Infinite, Nonlinear, Planar Waveguides," Microwave and Optical Technology Letters, Vol. 7, No. 13, pp. 620-625, September 1994.
    J. I. Ramos and F. R. Villatoro, "The Nonlinear Shrödinger Equation in the Finite Line," Mathematical and Computer Modelling : An International Journal,  Vol. 20, No. 3, pp. 31-59, 1994.
    J. I. Ramos, "Hopf Bifurcation in Mass Transfer with Sievert's Solubility Law," Mathematical and Computer Modelling: An International Journal, Vol. 20, No. 3, pp. 61-72, 1994.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos, "On the Growth of Underpressurized Annular Liquid Jets," Applied Mathematical Modelling,  Vol. 19, No. 1, pp.13-25, 1995.
    J. I. Ramos, "Asymptotic Methods for the Analysis of Wave Propagation in Nonlinear, Lossless Transmission Lines and Equivalent Circuits," Microwave and Optical Technology Letters, Vol. 8, No. 4, pp. 186-193, March 1995.
    J. I. Ramos, "Isothermal Mass Transfer in Annular Liquid Jets with Sievert's Solubility Law," Archive of Applied Mechanics, Vol. 65, pp. 260-269, 1995.
    J. I. Ramos, "Hopf Bifurcation in Annular Liquid Jets with Mass Transfer", International Journal for Numerical Methods in Fluids,  Vol. 20, No. 12, pp. 1293-1314, 30 June 1995.
    J. I. Ramos, "One-Dimensional, Time-Dependent, Homogeneous, Two-Phase Flow in Volcanic Conduits", International Journal for Numerical Methods in Fluids, Vol. 21, No. 3, pp. 253-278, 1995.
    J. I. Ramos, "Fluid Dynamics of Slender, Thin, Annular Liquid Jets", International Journal for Numerical Methods in Fluids, Vol. 21, No. 9, pp.735-761, 1995.
    J. I. Ramos, "The Effects of Fluctuating Body Forces on Annular Liquid Jets," Archive of Applied Mechanics, Vol. 65, pp. 548-563, 1995.
    J. I. Ramos, "The Effects of the Solubility Law on Mass Transfer in Annular Liquid Jets" Chemical Engineering Communications, Vol. 139, pp.137-157, 1995.
Vuelta al índice  Vuelta al índice Publicaciones
   J. I. Ramos, "Inviscid, Slender, Annular Liquid Jets", Chemical Engineering Science, Vol. 51, No. 6, pp. 981-994, 1996.
    J. I. Ramos and C. M. García-López, "Linearized q-Methods: I. Ordinary Differential Equations," Computer Methods in Applied Mechanics and Engineering, Vol. 129, pp. 255-269, 1996.
    J. I. Ramos, "Planar Liquid Sheets at Low Reynolds Numbers" International Journal for Numerical Methods in Fluids, Vol. 22, pp. 961-978, 1996.
    J. I. Ramos, "Upward and Downward Annular Liquid Jers: Conservation Properties, Singularities and Numerical Errors," Applied Mathematical Modelling,  Vol. 20, No. 6, pp. 440-458, 1996.
    C. M. García-López and J. I. Ramos, "A Piecewise-Linearized Method for Ordinary Differential Equations: Two-Point Boundary-Value Problems," International Journal for Numerical Methods in Fluids, Vol. 22, pp. 1089-1102, 1996.
    J. I. Ramos, "G-Jitter Effects on Mass Transfer in Annular Liquid Jets," International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 6, No. 5, pp. 17-28, 1996.
    J. I. Ramos, "Force Fields on Inviscid, Slender, Annular Liquid Jets," International Journal for Numerical Methods in Fluids, Vol. 23, pp. 221-239, 1996.
    J. I. Ramos, "One-Dimensional Models of Steady, Inviscid, Annular Liquid Jets," Applied Mathematical Modelling,  Vol. 20, No. 8, pp. 593-607, 1996.
    J. I. Ramos, "Irrotational, Annular Liquid Jets," Journal of Mathematical Analysis and Applications,  Vol. 202, pp. 538-554, 1996.
    C. M. García-López and J. I. Ramos, "Linearized q-Methods: II. Reaction-Diffusion Equations," Computer Methods in Applied Mechanics and Engineering, Vol. 137, pp. 357-378, 1996.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos, "Asymptotic and Numerical Analysis of Vertical, Planar Liquid Sheets subject to London-van der Waals Forces," International Journal of Numerical Methods for Heat and Fluid Flow,  Vol. 7, No. 1, pp. 2 and 42-62, 1997.
    J. I. Ramos, "The Effect of Surfactants on the Growth of Underpressurized, Annular Liquid Jets" Chemical Engineering Communications, Vol. 160, pp. 157-174, 1997.
    J. I. Ramos, "A Non-Standard Finite Difference Method for the One-Dimensional Advection Equation in Cylindrical-Polar Coordinates," Applied Mathematical Modelling, Vol. 21, pp. 337-338, 1997.
    J. I. Ramos, "Mass Transfer in Annular Liquid Jets in the Presence of Liquid Flow Rate Fluctuations," Applied Mathematical Modelling, Vol. 21, pp. 363-369, 1997.
    J. I. Ramos, "Lumped Models of Gas Bubbles in Thermal Gradients," Applied Mathematical Modelling, Vol. 21, pp. 371-386, 1997.
    J. I. Ramos and C. M. García-López, "Piecewise-Linearized Methods for Initial-Value Problems," Applied Mathematics and Computation, Vol. 82, Nos. 2&3, pp. 273-302, 1997.
    J. I. Ramos and C. M. García-López, "Non-Standard Finite Difference Methods for Ode's and 1-D Pde's based on Piecewise Linearization," Applied Mathematics and Computation,  Vol. 86, No. 1, pp. 11-36, 1997.
    J. I. Ramos and C. M. García-López, "Short Communication: Comments on a Recent Paper dealing with the Finite-Analytic Method," International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 7, No. 8, pp. 776 and 794-800, 1997.
    J. I. Ramos, "Linearization Methods for Reaction-Diffusion Equations: 1-D Problems," Applied Mathematics and Computation, Vol. 88, Nos. 2&3, pp. 199-224, 1997.
    J. I. Ramos, "Linearization Methods for Reaction-Diffusion Equations: Multidimensional Problems," Applied Mathematics and Computation, Vol. 88, Nos. 2&3, pp. 225-254, 1997.
    J. I. Ramos, "Analysis of Annular Liquid Membranes and Their Singularities," Meccanica, Vol. 32, pp. 279-293, 1997.
   J . I. Ramos, "Magma Ascent in Volcanic Conduits," Acta Vulcanologica, Vol. 9, Nos. 1/2, pp. 157-166, 1997.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos, "Upstream Boundary Conditions for Flows in Porous Channels," Applied Mathematics and Computation, Vol. 93, No. 3, pp. 149-154, 1998.
    J. I. Ramos, "A Piecewise Time-Linearized Method for the Logistic Differential Equation," Applied Mathematics and Computation, Vol. 93, No. 3, pp. 139-148, 1998.
    J. I. Ramos, "Implicit, Compact, Linearized q-Methods with Factorization for Multidimensional Reaction-Diffusion Equations," Applied Mathematics and Computation, Vol. 94, No. 1, pp. 17-43, 1998.
    J. I. Ramos, "Maps of Implicit, Linearized q-Methods for the Logistic Differential Equation," Applied Mathematics and Computation, Vol. 94, No. 1, pp. 1-15, 1998.
    J. I. Ramos and C. M. García-López, "Intermediate Boundary Conditions in Operator-Splitting Techniques and Linearization Methods," Applied Mathematics and Computation,  Vol. 9, No. 3, pp. 113-136, 1998.
    J. I. Ramos, "Annular Liquid Jets and Other Axisymmetric Free-Surface Flows at High Reynolds Numbers," Applied Mathematical Modelling , Vol. 22, No. 6, pp. 423-452, 1998.
    J. I. Ramos, "Short Note: Leading-Order Equivalence of Two Formulations for Long, Annular Liquid Membranes," Applied Mathematical Modelling , Vol. 22, No. 6, pp. 453-457, 1998.
    J. I. Ramos, "An adaptive method for heat transfer in annular liquid jets," International Journal of Computational Fluid Dynamics , in press, 1998.
Vuelta al índice  Vuelta al índice Publicaciones
    F.R.Villatoro and J.I. Ramos, "On the method of modified equations. I: Asymptotic analysis of the Euler forward difference method", Applied Mathematics and Computation. in press, 1999.
    F.R. Villatoro and J.I. Ramos, "On the method of modified equations. II: Numerical techniques based on the equivalent equation for the Euler forward difference method", Applied Mathematics and Computation. in press, 1999.
    F.R. Villatoro and J.I. Ramos, "On the method of modified equations. III: Numerical techniques based on the second equivalent equation for the Euler forward difference method", Applied Mathematics and Computation. in press, 1999.
    F.R. Villatoro and J.I. Ramos, "On the method of modified equations. IV: Numerical techniques based on the modified equation for the Euler forward difference method", Applied Mathematics and Computation. in press, 1999.
    F.R. Villatoro and J.I. Ramos, "On the method of modified equations. V: Asymptotic analysis of and direct-corrections and asymptotic successive-corrections techniques for the implicit midpoint method", Applied Mathematics and Computation. in press, 1999.
    F.R. Villatoro and J.I. Ramos, "On the method of modified equations. VI: Asymptotic analysis of and asymptotic successive-corrections techniques for two-point, boundary-value problems in ODE's", Applied Mathematics and Computation. in press, 1999.
Vuelta al índice  Vuelta al índice Publicaciones


Artículos en Libros Editados (Papers in Edited Books)

    C. H. Berman, J. I. Ramos, "Computation of Turbulence Noise," Computational Acoustics: Volume 2: Scattering, Gaussian Beams, and Aeroacoustics, editado por D. Lee, A. Cakmak y R. Vichnevetsky, pp. 242–251, North-Holland, Amsterdam, The Netherlands, 1990.
    J. I. Ramos, "Methods of Lines for One-Dimensional Combustion Problems", Athens Interdisciplinary Olympia 91, First International Symposium on Methods of Lines, Surfaces and Dimensional Reduction in Computational Mathematics and Mechanics, Athens, Greece, 11–16 Noviembre 1991 (en prensa). (Invitado). (61 pp).
    J. I. Ramos, "Domain-Adaptive Methods of Lines for Inviscid Annular Liquid Jets", Athens Interdisciplinary Olympia 91, First International Symposium on Methodsof Lines, Surfaces and Dimensional Reduction in Computational Mathematics and Mechanics, Athens, Greece, 11–16 Noviembre 1991 (en prensa). (Invitado). (98 pp).
    J. I. Ramos, "Simulation of Global Volcanic Systems: Numerical and Computer Implementation Challenges," Prospects for the Simulation of Volanic Eruptions, eds. F. Dobran and F. Mulargia, pp. 57-60,  Gardini, Pisa, Italy, Noviembre 1991.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos and F. Dobran, "Section 4. Magma Ascent Model Development; Section 4.1. Modeling Strategy; Section 4.2. Completed Implementation of Magma Ascent Model," pp. 71-79 and 81-108, in F. Dobran, Global Volcanic Simulation, Volume 2: Magma and Lava Flow Modeling and Volcanic System Definition aimed at Hazard Assessment at Etna, Giardini, Pisa, Italy, January 1994.
    J. I. Ramos, "Section 5. Lava Model Development; Section 5.4. Global Lava Flow Model," pp. 115, and 117-127, in F. Dobran, Global Volcanic Simulation, Volume 2: Magma and Lava Flow Modeling and Volcanic System Definition aimed at Hazard Assessment at Etna, Giardini, Pisa, Italy, January 1994.
    J. I. Ramos, "The Fluid Dynamics of Thin Annular Liquid Jets," in Current Topics in the Physics of Fluids, Vol. 1, pp. 75-121, edited by The Council of Scientific Information, Kaithamukku, Trivandrum, India, 1994. (Invitado).
Vuelta al índice  Vuelta al índice Publicaciones
    Luis F. Romero, E. L. Zapata and J. I. Ramos, "Parallel Computing of Semiconductor Laser Equations," Proceedings of the Eighth SIAM Conference on Parallel Processing for Scientific Computing, 8 pp., CDROM ISBN 0-89871-395-1, SIAM, Philadelphia, Pennsylvania, 1997. Also, Book of Abstracts, Session CP2: Applications I, Paper CP02, p. 26, Minneapolis, Minnesote, 14-17 March 1997.
    Luis F. Romero, E. L. Zapata and J. I. Ramos, "Nonlinear Dynamics of Semiconductor Laser Arrays," Fourth SIAM Conference on Applications of Dynamical Systems, Book of Abstracts, p. 39, Snowbird, Utah, 18-22 May 1997.
    J. I. Ramos, "Two-Dimensional Simulations of Magma Ascent in Volcanic Conduits," Numerical Methods for Laminar and Turbulent Flow, Volume 10, Proceedings of the Tenth International Conference, edited by C. Taylor and J. T. Cross, pp. 989-1000, Pineridge Press, Swansea, United Kingdom, 1997.
    J. I. Ramos, "Iterative Factorization Techniques for Multidimensional Reaction-Diffusion Equations,"Fifteenth IMACS World Congress on Scientific Computation, Modelling and Applied Mathematics. Volume 3: Computational Physics, Chemistry and Biology, edited by Achim Sydow, pp. 651-656, Wissenschaft & Technik Verlag, Berlin, Germany, 1997.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos, "Exact-Factorization, Compact Methods for Multidimensional Heat Transfer: Application to Combustion," CHT'97: Advances in Computational Heat Transfer, Proceedings of a Symposium organized by the International Centre of Heat and Mass Transfer, Cesme, Turkey, 26-30 May 1997, edited by Graham de Vahl Davis and Eddie Leonardi, pp. 176-183, Begell House, Inc., New York, 1998.
    J. I. Ramos, "An Adaptive Method for Heat Transfer in Annular Liquid Jets," CHT'97: Advances in Computational Heat Transfer, Proceedings of a Symposium organized by the International Centre of Heat and Mass Transfer, Cesme, Turkey, 26-30 May 1997, edited by Graham de Vahl Davis and Eddie Leonardi, pp. 673-680, Begell House, Inc., New York, 1998.
    J. I. Ramos, "Mass Transfer in Annular Liquid Jets," International Symposium on Liquid-Liquid Two-Phase Flow and Transport Phenomena, Antalya, Turkey, 3-7 November 1997, edited by M. D. Maron, pp. 425-434, Begell House, Inc., New York, 1998.
    E. Soler, J. I. Ramos and J. M. Troya, "Domain-decomposition methods for nonlinear reaction-diffusion equations," Book of Abstracts of Invited Lectures ans Short Communications, Seventh International Colloquium on Numerical Analysis and Computer Science with Applications, p. 123, Plovdiv, Bulgaria, 13-17 August 1998.

Vuelta al índice  Vuelta al índice Publicaciones


Proceedings Internacionales (Papers in Proceedings)

    J. I. Ramos, "Adaptive and Non-Adaptive Hermitian Operator Methods for Combustion Phenomena,"Second World Congress on Computational Mechanics, Extended Abstracts of Lectures, pp. 1031–1034, University of Stuttgart, Stuttgart, Federal Republic of Germany, 27–31 Agosto 1990.  (Invitado).
    J. I. Ramos, "Lagrangian, Characteristic and Adaptive Finite Difference Methods for Inviscid Liquid Membranes,"Second World Congress on Computational Mechanics, Extended Abstracts of Lectures, pp. 120–123, University of Stuttgart, Stuttgart, Federal Republic of Germany, 27–31 Agosto 1990.
    I. Molina-Fernández, C. Camacho-Peñalosa, J. I. Ramos, "Analysis of the Formation and Interaction of Solitons in Nonlinear Transmission Lines by means of a Harmonic Balance Technique", Proceedings of the IEEE Mediterranean Electrotechnical Conference, MELECON'91, edited by B. Zajc and F. Solina, Volume I, pp. 672-675, Ljubljana, Yugoslavia, 22–24 Mayo 1991.
    J. I. Ramos, J. Falgueras, E. Nava, "A Domain-Adaptive Block Bidiagonal Technique for Annular Liquid Jets", IMACS'91, Proceedings of the Thirteenth IMACS World Congress on Computation and Applied Mathematics, editado por R. Vichnevetsky y J. J. H. Miller, Volume 2, pp. 902-903, IMACS, Trinity College, Dublin, Irlanda, 22–26 Julio 1991.
    J. I. Ramos, I. Molina-Fernández, C. Camacho-Peñalosa, "Interaction of Solitons in Nonlinear Transmission Lines", Proceedings of the Third International Symposium on Recent Advances in Microwave Technology (ISRAMT'91), editado por B. S. Rawat y K. K. Agarwal, pp. 313-316, Reno, Nevada, 18–21 Agosto 1991.
    J. I. Ramos, "Domain-Adaptive Techniques for Two-Dimensional, Time-Dependent Chemically Reactive Flows," SIAM Fourth International Conference on Numerical Combustion,  Abstract Book, pp. 174-175, St. Petersburg Beach, 2-4 Diciembre 1991.
    J.I. Ramos, "Soot, Radiation, and Conjugate Heat Transfer in RQL and LPP Combustors," HSR Analytical Combustion Research Workshop Proceedings, NASA Conference Publication 10095, pp. 175-186, NASA Lewis Research Center, Cleveland, Ohio, 1991.
Vuelta al índice  Vuelta al índice Publicaciones
    J. I. Ramos and F. Dobran, "Numerical Simulation of One-Dimensional Time-Dependent Flows in Volcanic Conduits," Poster session, National Meeting of the Italian Volcanological Society, Gruppo Nazionale per la Vulcanologia, Palermo, Italy, 4-6 April 1992.
    J. I. Ramos, "Domain-Adaptive Finite Difference Methods for Annular Liquid Jets", Symposium on Science and Supercomputing, Winners of Cray Research, Inc.’s 1991 Research Awards, Pittsburgh Supercomputing Center, Pittsburgh, Pennsylvania, 15 April 1992. (Invitado).
    I. Molina-Fernández, C. Camacho-Peñalosa and J.I. Ramos, "Nonlinear Wave Propagation in Transmission Lines," Proceedings of the URSI International Symposium on Electromagnetic Theory,  pp. 287-289, IEEE, Sydney, Australia, 17-20 Agosto 1992.
    J. I. Ramos, "Lava Flow Modeling applied to the Hazard Assessment at Etna," International Workshop on European Laboratory Volcanoes, Poster, Aci Castello, Catania, Italy, 19-21 June 1994.
    F. Dobran and J. I. Ramos, "Two-Dimensional Magma Flow with Solidification and Melting in Volcanic Conduits," International Workshop on European Laboratory Volcanoes, Poster, Aci Castello, Catania, Italy, 19-21 June 1994.
    J. I. Ramos, "Lava and Magma Flow Modelling," Proceedings of the International Workshop on European Laboratory Volcanoes,  Aci Castello, Catania, Italy, 19-21 June 1994.
Vuelta al índice  Vuelta al índice Publicaciones
    L. F. Romero, E. L. Zapata and J. I. Ramos, "Efficient Parallel Solution of a Semiconductor Laser Array Dynamics Model," in High-Performance Computing and Networking, edited by H. Liddell, A. Colbrook, B. Hertzberger and P. Sloot, Lectures Notes in Computer Science, Vol. 1067, pp. 937-938, Springer-Verlag, Berlin, 1996.
    L. F. Romero, E. L. Zapata and J. I. Ramos, "Parallel Simulation of Semiconductor Laser Arrays," Supercomputacion in Nonlinear and Disordered Systems: Algorithms, Applications and Architectures, edited by Luis Vázquez, Francisco Tirado and Ignacio Martín, pp. 335-342, World Scientific, Singapore, 1997.

Vuelta al índice  Vuelta al índice Publicaciones


Congresos Internacionales (International Simposia)

    J. I. Ramos, "Asymptotic Methods and Adaptive Finite Difference Techniques for the Study of Combustion in Heterogeneous Chemical Reactors," Simposio Internacional sobre "Modelado de Sistemas en Oceanografía, Climatología y Ciencias Medioambientales: Aspectos Matemáticos y Numéricos", Torremolinos, España, 24-26 Enero 1994. (Invitado).
    J. I. Ramos, "Adaptive Finite Difference Techniques for the Study of the Isothermal Combustion of Toxic Wastes in Heterogeneous Chemical Reactors"  en Modelado de Sistemas en Oceanografía, Climatología y Ciencias Medioambientales: Aspectos Matemáticos y Numéricos, editado por Antonio Valle y Carlos Parés, pp. 111-122, Grupo de Análisis Matemático Aplicado, Universidad de Málaga, Málaga, Spain, 1994. (Invitado).
    C. M. García-López and J. I. Ramos, "Linearized Finite Difference Methods: Application to Nonlinear Heat Conduction Problems," Advanced Computational Methods in Heat Transfer IV, edited by L. C. Wrobel, G. Comini, C. A. Brebbia and A. J. Nowak, pp. 527-536, Computational Mechanics Publications, Southampton, United Kingdom, 1996.
    L. F. Romero, E. L. Zapata and J. I. Ramos, "A Parallel q-Method for a Semiconductor Laser Array Model," Proceedings of the 8th Joint EPS-APS International Conference on Physics Computing, pp. 325-328, eds. P. Borcherds, M. Bubak and A. Maksymowicz, Academic Computer Center, CYFRONET-KRAKÓW, Kraków, Poland, 17-21 September 1996.
    J. I. Ramos, "Exact-Factorization, Compact Methods for Multidimensional Heat Transfer: Application to Combustion," International Symposium on Advances in Computational Heat Transfer,  Book of Abstracts, pp. 69-71, International Centre for Heat and Mass Transfer, Cesme, Turkey,  26-30 May 1997.
    J. I. Ramos, "An Adaptive Method for Heat Transfer in Annular Liquid Jets," International Symposium on Advances in Computational Heat Transfer,  Book of Abstracts, pp. 191-193, International Centre for Heat and Mass Transfer, Cesme, Turkey,  26-30 May 1997.
  J. I. Ramos, "Mass Transfer in Annular Liquid Jets," International Symposium on Liquid-Liquid Two-Phase Flow and Transport Phenomena, Book of Abstracts, pp. 93-94, International Centre for Heat and Mass Transfer, Antalya, Turkey, 3-7 November 1997.

Vuelta al índice  Vuelta al índice Publicaciones


Congresos Nacionales (Spanish Simposia)

    I. Molina Fernández, J. I. Ramos, C. Camacho Peñalosa, "Circuitos no-lineales distribuidos pasivos y sus modelos equivalentes continuos", Actas delVI Simposium Nacional de la Unión Científica Internacional de Radio (URSI’91), Volumen I, pp. 24-28, Cáceres, 24-27 Septiembre 1991.
    I. Molina-Fernández, C. Camacho-Peñalosa and J.I. Ramos, "Aplicación de la Transformada de Fourier Bidimensional a Fenómenos de Propagación No-Lineal,"   Actas delVII Symposium Nacional de la Unión Científica Internacional de Radio,   eds. Carlos Camacho Peñalosa, Teresa M. Martín Guerrero and Antonio Puerta Notario,  Vol. II, pp. 762-765, Málaga, Spain, 23-25 September 1992.
    J.I. Ramos, "Métodos de Diferencias Finitas y Elementos Finitos para el Estudio de Bombas Magnetohidrodinámicas," Actas del VII Symposium Nacional de la Unión Científica Internacional de Radio,   eds. Carlos Camacho Peñalosa, Teresa M. Martín Guerrero and Antonio Puerta Notario,  Vol. I, pp. 503-507, Málaga, Spain, 23-25 September 1992.
    I. Molina-Fernández, C. Camacho-Peñalosa and J. I. Ramos, "Estudio de los Efectos introducidos por la Discretización en el Análisis Numérico de Fenómenos de Propagación No-Lineal," VIII Symposium Nacional de la Unión Científica Internacional de Radio, Tomo I, pp. 630-634, Servicio de Publicaciones, Universidad Politécnica de Valencia, Valencia, Spain, 22-24 Septiembre 1993.
    F. R. Villatoro and J. I. Ramos, "Métodos Asintóticos para el Análisis de Líneas de Transmisión No Lineales con Perdidas," Libro de Actas, pp. 407-410, X Symposium Nacional de la Unión Científica Internacional de Radio, Universidad de Valladolid, Valladolid, 27-29 Septiembre 1995.
    C. M. García López, J. I. Ramos and E. Márquez Segura, "Aplicación de los q-Métodos Linealizados a la Simulación de Circuitos en el Dominio del Tiempo," Libro de Actas, pp. 907-910, X Symposium Nacional de la Unión Científica Internacional de Radio, Universidad de Valladolid, Valladolid, 27-29 Septiembre 1995.
    C. M. García López and J. I. Ramos, "Métodos de Diferencias Finitas Linealizados y su Aplicación al Estudio de Líneas de Transmisión no Lineales," Libro de Actas, Vol. I, pp. 25-28, XI Symposium Nacional de la Unión Científica Internacional de Radio, eds. J. M. Páez Borrallo and J. I. Alonso Montes, Servicio de Publicaciones, E. T. S. I. Telecomunicación, Universidad Politécnica de Madrid, Madrid, 18-20 Septiembre 1996.
     Diego J. Navarro, Lawrence Mandow, y Francisco R. Villatoro, "Representación de Arboles Mediante L-gramáticas y Sistemas de Partículas",  Actas del II Jornadas de Informática, (AEIA), Almuñecar (España) , pp. 647-650, 1996.
     Juan A. Falgueras y Francisco R. Villatoro, "DeSolve:Un Paquete en Mathematica para la Resolucion de Ecuaciones Diferenciales Ordinarias", Actas del I Congreso Mathematica en España, Universidad de Valencia (España), pp. 91-101, 1996.
    J. I. Ramos, "Perturbaciones Periódicas de Bifurcaciones de Hopf en Chorros Anulares con Transferencia de Masa," No-lineal 97, Book of Abstracts, Departamento de Física Fundamental, U.N.E.D., 10-12 Abril 1997. (Invitado).
    C. M. García López and J. I. Ramos, "Propagación de solitones en guías de onda con índice de refracción variable," Actas del XII Symposium Nacional de la Unión Científica Internacional de Radio, Volumen I, pp. 105-108, Iberdrola Instituto Tecnológico, Bilbao, Spain, 1997.
    J. I. Ramos and F. R. Villatoro, "Propagation of solitons and antisolitons associated with the sine-Gordon equation in Josephson superconducting junctions," Actas del XII Symposium Nacional de la Unión Científica Internacional de Radio, Volumen I, pp. 109-112, Iberdrola Instituto Tecnológico, Bilbao, Spain, 1997.

Vuelta al índice  Vuelta al índice Publicaciones
 


Tesis Doctorales (Ph. D. Thesis)

  Vuelta al índice

Proyectos de Investigación (Research Support)

  Vuelta al índice

Última modificación: 19 / Enero / 1999.