PUBLICATIONS

• On the Numerical Solution of Liquid Film and Jet Flows, Ph.D. Thesis. Arizona State University, Tempe, Arizona, USA 1999. Numerical solution of certain type of free surface flow problems using the non-staggered grid fractional step method and the solution of depth-averaged equations with flux vector splitting methods.
• Design and Construction of Two Frames for Experimental Stress Analysis Using the Oblique Incidence Method, ``Desarrollo de Dos Bancos de Prueba para Medir Esfuerzos por el Método de Incidencia Obliqua''. M.S. Thesis, Universidad de Guanajuato, Guanajuato, México 1993. Experiments with polariscope were carried out to determine the principal stresses of plates whose shape was obtained using the statically determined fields.
• Matrix Methods for the Solution of Power Systems, ``Análisis Matricial de Redes Eléctricas Orientado al Estudio de Fallas y Flujos de Carga''. B.M.E.E. Thesis, Universidad Iberoamericana, León, México 1991. A Newton-Raphson method was introduced to analyze electrical power systems.

• Smirnov, S., Pacheco, J. R., and Verzicco, R., Numerical studies of nonlinear stratified spin-up in a cylinder. J. Fluid Mech. Submitted 2009

• Chen, K.P., Pacheco, J.R., Hayes, M. A., Staton, S. Insulator-based dielectrophoretic separation of small particles in a sawtooth channel . Electrophoresis , 30: 1441-1448, 2009.
• Aguirre, F., Villalobos, J.R., Phelan, P.E., and Pacheco, J.R. The use of energy-production signatures to the relative efficiency of energy use in a manufacturing plant Energy Journal, 2009.

• Pacheco, J.R. Mixing enhancement in electro-osmotic flows via modulation of electric fields. Physics of Fluids, 20 (9):  093606, 2008.
• Smirnov, S. A., Pacheco, J.R., and Verzicco, R. Laboratory-numerical studies of stratified spin-up flows. Environmental Fluid Mechanics, 8 (5-6): 535-541 , 2008.
• Pacheco, J.R., Chen. K.P., Pacheco-Vega, A., Chen, B., Hayes, M. A. Chaotic mixing enhancement in electro-osmotic flows by random period modulation. Physics Letters A, 372(7): 1001-1008, 2008.
• Tyagi, H., Phelan, P.E. Prasher, R., Peck, R. E., Lee T.-W., Pacheco, J.R., and Arentzen, P. Increased hot-plate ignition probability for nanoparticle-laden diesel fuel. Nanoletters, 8 (5): 1410-1416, 2008.
• Pacheco-Vega, A., Pacheco, J.R., and Rodic T. A general scheme for the boundary conditions in convective and diffusive heat transfer with immersed boundary methods. Journal of Heat Transfer, 129 (11): 1506-1516, 2007.
• Pacheco, J.R., Chen K.P., Hayes, M. A study on the condition for differential electrophoretic transport at a channel entrance. Electrophoresis, 28 (7): 1027-1035, 2007.
• Pacheco, J.R., Chen K.P., Hayes, M. Efficient and rapid mixing in a slip-driven three-dimensional flow in a rectangular channel. Fluid Dynamics Research, 38 (8): 503-521, 2006.
• Pacheco, J.R., Pacheco-Vega, A.J., Rodic T., Peck, R.E. Numerical simulations of heat transfer and fluid flow problems using an immersed-boundary finite-volume method on non-staggered grids. Numerical Heat Transfer B: Fundamentals. 48 (1): 1-24, 2005.
• Hunt, J.R.C., Pacheco, J.R., Mahalov, A., and Fernando, H.J.S. Effects of rotation and sloping terrain on fronts of density currents , J. Fluid Mech., 537: 285-315, 2005.
• Pacheco, J.R., Pacheco-Vega, A.J. Analysis of Thin Film Flows Using a Flux Vector Splitting, J. Fluids Engineering, 125, 365--374, 2003
• Pacheco, J.R., The solution of incompressible jet flows using non-staggered boundary fitted co-ordinate methods, Int. J. Numer. Methods Fluids. 35 (1): 71-91, 2001.
• Pacheco, J.R., Pacheco-Vega, A., and Pacheco-Vega, H.R., Numerical Comparison Between Spatial and Temporal Disturbances in a Pipe.. Revista Mexicana de Física. 47 (4): 339--346, 2001.
• Mahalov, A., Pacheco, J.R., Voropayev, S., Fernando, H.J.S. and Hunt, J.R.C., Effects of rotation on fronts of density currents . Physics Letters A. 270 (3-4): 149-156, 2000.
• Pacheco, J.R. and Peck, R.E., Non-staggered boundary fitted co-ordinate method for the solution of certain type of free surface flows, Numerical Heat Transfer B: Fundamentals. 37 (3): 267-291, 2000.

• Constantinescu, G.S., Pacheco, J.R. and Squires, K.D., Detached-eddy simulation of flow over a sphere, AIAA Paper 2002-0425, 2002.
• Pacheco, J.R. and Pacheco-Vega, A.J., The solution of viscous incompressible film flows. Proceedings of the 3rd European Thermal Science Conference. Editors: E.W.P. Hahne, W. Heidemann, K. Spindler Editors, Edizioni ETS. Vol. 1, 269-274, 2000.
• Pacheco, J.R., Pacheco-Vega, A.J., and Pacheco-Vega, H.R., A Numerical Comparison Between the Spatially-Growing and Temporally-Growing Disturbances in a Pipe. Proceedings of the Fifth International Meeting in Mechanical Engineering, San Luis Potosí, S.L.P., México, pp. 1-9, 1999.
• Pacheco, J.R. and Peck, R.E., The solution of viscous incompressible free surface jet flows using non-staggered boundary-fitted coordinate methods. Proc. of the 2nd International Symposium on Computational Technologies for Fluid/Thermal/Chemical Systems with Industrial Applications, ASME PVP Div. Vol. 397-2, pp. 89-98, 1999.
• Pacheco, J. R. and Peck, R.E., Non-staggered grid boundary fitted coordinate method for liquid film flows, Proc. of the 1st International Symposium on Computational Technologies for Fluid/Thermal/Chemical Systems with Industrial Applications, ASME PVP Div., Vol. 377-1, pp. 49-59, 1998.
• Pacheco-Vega, A.J., Pacheco-Vega, J.R., and Hernández, A., Application of spectral methods for the solution of differential equations. Proceedings of the Fourth International Meeting in Mechanical Engineering, San Luis Potosí, S.L.P., México, pp. 204-216, 1998.
• Pacheco, J.R. and Pacheco-Vega, A.J., The solution of the shallow-water equations via flux vector splitting methods and 2#2-schemes. Proceedings of the V Annual Meeting of the Mexican Society of Mechanical Engineering, México, pp. 78-87, 1999.

• Pacheco, J.R., Voropayev, S., Pacheco-Vega, A.J., Pacheco-Vega, S., Flux Vector Splitting for Shallow-Water flows. Proceedings of the International Conference Fluxes and Structures in Fluids, Moscow, Russia, 2001.
• Mahalov, A., Pacheco, J.R., Voropayev, S., Hunt, J.R.C. and Fernando, H.J.S. Effects of Rotation on Fronts of Density Currents. Fifth International Symposium on Stratified Flows. The University of British Columbia, Vancouver, Canada, pp. 1123-1129, 2000.
• Pacheco, J. R., Pacheco-Vega, A.J., and Pacheco-Vega, S. Analysis of Density Currents Using the Non-Staggered Grid Fractional Step Method. Fifth International Symposium on Stratified Flows. The University of British Columbia, Vancouver, Canada, pp. 1135-1141, 2000.
• Pacheco, J.R., Pacheco-Vega, A.J. Numerical Study of Density-Currents Using the Non-Staggered Grid Fractional Step Method, ASME Fluids Engineering Division, Vol 253, pp. 639-643, 2000.

• Muñoz, G., Lesso, R., Pacheco, J.R., Grudziñski, J., Stress analysis of dies with dovetail joints used in the forging process, (Análisis de esfuerzos en troquel con unión tipo Cola de Milano), Acta Universitaria Vol. 4 (1), pp. 44-52, 1994.

• Fundamental Theoretical and Numerical Issues of Characterization of Turbulence in the Middle Atmosphere. Air Force Office for Scientific Research (1999-2001).
• Numerical model of paint dryers using infra-red emitters. Sub-contractor: Gas Research Institute. MAE Department, Arizona State University (1998-1999).
• Design of a model of a plateau to perform experiments in the area of geophysical fluid dynamics, Internal Research Report. MAE Department, Arizona State University (1993).
• Design and construction of a universal frame to load birefringence plates, Internal Research Report. FIMEE Universidad de Guanajuato (1993).
• Analysis and development of a numerical method for electrical power systems, Internal Research Report. Department of Mechanical and Electrical Engineering, Universidad Iberoamericana (1991).
• Design of a methane processor from waste, Internal Research Report. Department of Agricultural and Food Sciences, Universidad Iberoamericana (1989).

Conferences:

• Pacheco, J.R., Voropayev, S., Pacheco-Vega, A.J., Pacheco-Vega, S., Flux Vector Splitting for Shallow-Water flows. International Conference Fluxes and Structures in Fluids, Moscow, Russia, June 20-22, 2001.
• Mahalov, A., Pacheco, J.R., Voropayev, S., Hunt, J.R.C. and Fernando, H.J.S. Effects of Rotation on Fronts of Density Currents. Fifth International Symposium on Stratified Flows. The University of British Columbia, Vancouver, Canada July 10-13, 2000.
• Pacheco, J. R., Pacheco-Vega, A.J., and Pacheco-Vega, S. Analysis of Density Currents Using the Non-Staggered Grid Fractional Step Method. Fifth International Symposium on Stratified Flows. The University of British Columbia, Vancouver, Canada July 10-13, 2000.
• Pacheco, J.R., Pacheco-Vega, A.J. Numerical Study of Density-Currents Using the Non-Staggered Grid Fractional Step Method, ASME, ``2000 Forum on Fluid Transients'', November 5-10, 2000, Orlando, Florida, USA.
• Pacheco, J.R., Pacheco-Vega, A.J. Prediction of Hydraulic Jumps of Thin Liquid Films in Radially Spreading Flows. `` The Sixteenth Arizona Fluid Mechanics Conference'', Arizona State University, February 25-26, 2000, Tempe, Arizona, USA.
• Pacheco, J.R, Hunt, J.R.C., Mahalov, A., Voropayev, S. and Fernando, H.J.S. Effects of Rotation on Fronts of Density Currents. `` The Sixteenth Arizona Fluid Mechanics Conference'', Arizona State University, February 25-26, 2000, Tempe, Arizona, USA.
• Pacheco, J.R. and Pacheco-Vega, A.J., The solution of viscous incompressible film flows. 3rd European Thermal Science Conference, September 10-13, Heidelberg, Germany, 2000.
• Pacheco, J.R. and Pacheco-Vega, A.J., The solution of the shallow-water equations via flux vector splitting methods and 2#2-schemes. Fifth International Congress of the Mexican Society of Mechanical Engineering, October 20-23, 1999, Oaxaca, Oax., México.
• Pacheco, J.R., Pacheco-Vega, A.J., and Pacheco-Vega, H.R., A Numerical Comparison Between the Spatially-Growing and Temporally-Growing Disturbances in a Pipe. Fifth International Meeting in Mechanical Engineering, October 27-29, 1999. San Luis Potosí, S.L.P., México.
• Pacheco, J.R. and Peck, R.E., The solution of viscous incompressible jet flows using non-staggered boundary-fitted coordinate methods. 2nd International Symposium on ``Computational Technologies for Fluid/Thermal/Chemical Systems with Industrial Applications'', August 1-5, 1999, Boston, Massachusetts, USA.
• Pacheco, J.R. and Peck, R.E., Boundary-fitted coordinate methods applied to the solution of viscous incompressible jet flow problems. `` The Fifteenth Arizona Fluid Mechanics Conference'', University of Arizona, April 23-24, 1999, Tucson, Arizona, USA.
• Pacheco-Vega, A.J., Pacheco-Vega, J.R., and Hernández, A., Application of spectral methods for the solution of differential equations. (Aplicación de los métodos espectrales para la solución de ecuaciones diferenciales). Fourth International Meeting in Mechanical Engineering, October 20-23, 1998. San Luis Potosí, S.L.P., México.
• Pacheco, J.R. and Peck, R.E., Non-staggered Boundary Fitted Co-ordinate Method for the Solution of Certain Type of Free Surface Flows. 1st International Symposium on ``Computational Technologies for Fluid/Thermal/Chemical Systems with Industrial Applications''. Joint ASME/JSME, July 26-30, 1998, San Diego, California, USA.
• Pacheco, J.R. and Peck, R.E., Non-staggered Grid Fractional Step Method for the Solution of Certain Types of Free Surface Flows. ``The Fourteenth Arizona Fluid Mechanics Conference'', Arizona State University, March 27-28, 1998, Tempe, Arizona, USA.
• Pacheco, J.R. Experimental Stress Analysis with the Method of Oblique Incidence (Análisis Experimental de Esfuerzos por el Método de Incidencia Oblicua). A paper presented at the National Conference of Mechanical Engineering Graduate Students. ``Conferencia Nacional de Estudiantes de Posgrado en Ingeniería Mecánica''), Universidad de Guanajuato, November 28-30, 1992, Salamanca Guanajuato, México.

Books:

• Pacheco, J.R. and Pacheco-Vega, A.J., ``Introducción a los Métodos Espectrales-Teoría y Aplicaciones''. (``Introduction to Spectral Methods-Theory and Applications''). Sent to AlfaOmega, 2001.
• Pacheco, J.R. and Pacheco, A.J., ``Métodos Numéricos en Mecánica de Fluidos y Transferencia de Calor''. (``Numerical Methods in Fluid Mechanics and Heat Transfer''). In preparation, 2001.

Tesis:

1. Desarrollo de un programa para resolver la ecuacion de Poisson por los metodos del gradiente conjugado y multimalla. Aqui se pretende desarrollar dos programas para resolver la ecuacion de Poisson en tres dimensiones y compara la efectividad y rapidez de solucion entre ellos.

2. Estudio de corrientes gravitatorias tridimensionales y el efecto de la rotacion. Se pretende hace simulaciones numericas tridimensionales y compara los resultados con experimentos para revelar el efectos que la rotacion tiene en este tipo de flujos.

3. Analisis de la turbulencia en un bloque por medio de DES y LES.  El proyecto pretende analizar la separacion masiva del fluido que ocurre en este tipo de flujo abierto.  Este estudio tiene un impacto importante en el entendimiento del desprendimiento de la capa limite tanto turbulenta como laminar en la dispersion de particulas contaminantes y determinar la fuerza de arrastre (i.e. diseno de  edificios).

1. Analisis de la posible solucion de la estabilidad no lineal en un anulo: Se pretende analizar la posibilidad de expandir las variables primitivas mediante el conjunto de vectores caracteristicos que se obtienen del analisis de estabilidad lineal. El analisis del conjunto de vectores caracteristicos pretende probar que este no es autonormal y que no forma un conjunto completo.

2. Analisis de las perturbaciones asimetricas en una tuberia: Se analiza los efectos de las perturbaciones no simetricas (n>0) para el flujo de Poiseuille en una tuberia. Se pretende expandir la teoria analitica existente para n=0 a perturbaciones asimetricas para obtener una relacion entre la velocidad de grupo que relaciona las perturbaciones en el tiempo y el espacio.