Ciencias Exactas y Ciencias de la Salud
Permanent URI for this collectionhttps://hdl.handle.net/11285/551039
Pertenecen a esta colección Tesis y Trabajos de grado de las Maestrías correspondientes a las Escuelas de Ingeniería y Ciencias así como a Medicina y Ciencias de la Salud.
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- Caracterización de emulsiones preparadas mediante un inversor de flujo helicoidal(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2018-05) de la Herrán-Zambada, Mariandrea; López Salinas, José Luis; Rivera Solorio, Carlos Iván; García Cuéllar, Alejandro JavierIn the present work the effect of two emulsifiers in colloidal dispersion (oil / water) was studied using different preparation techniques. The emulsifiers analyzed were hydrophilic silica particles and sodium dodecyl sulfate. Both emulsifiers were previously dispersed using an ultrasonic bath and ultrasonic tip as preparation technique to evaluate the effect in the colloidal dispersion. According to the particle size distribution of each emulsifier, it was found that the ultrasonic tip offers more stability on aqueous dispersion because of the measurements reproducibility. The concentration effects of the silica particles and sodium dodecyl sulfate were studied measuring oil-water glass contact angle and oil-water interfacial tension. Samples were prepared using an ultrasonic tip, a coiled flow inverter and helical pipe. Experimental results suggest that silica particle concentration does not influence the interfacial tension and the contact angle in the oil-water system. The results also show that the interaction between surfactant and silica particle is affected by the mixing conditions during the colloidal dispersion process. Emulsions prepared with the ultrasonic tip show a strong interaction between both emulsifiers surfactant and silica particles, on the other hand, the coiled flow inverter and the helical pipe used under the laminar flow conditions show moderate and almost equal interaction between both emulsifiers according to droplet size distribution measures.
- Simulation and modeling of three mechanisms of flow through porous media.(2017-12-05) Romero Flores, Michel; López Salinas, José Luis; García Cuéllar, Alejandro Javier; Rivera Solorio, Carlos IvánThe mathematical modeling of two-phase flow in saturated porous media, as well as the modeling of adsorption/retention behavior of surface active materials in a porous medium composed of a complex network of macro, meso, and micropores in 1-D, 2-D and axisymmetric cases and the displacement of two phases in capillary conducts, were studied. Also, a Comparison of two CFD tools is made (COMSOL and ANSYS Fluent). The results were compared with experimental data from the literature. For the saturated porous media study and mathematical modeling of adsorption/retention behavior, COMSOL software was used, while for the capillary conducts displacement, ANSYS Fluent was chosen. In the saturated porous media analysis, different ways to obtain permeabilities and their effects on the flow in saturated porous media were compared. For the mathematical modeling of adsorption/retention behavior of surface active materials in a porous medium different effects were analyzed: the selection of boundary conditions, the size of the tracer and surfactant signals, effects of reversible and irreversible adsorption, the difference between local equilibrium and the rate-limited process. Also, for 2-D and axisymmetric simulations, heterogeneities, blends of surfactant and dispersion/diffusion effects were studied. The proposed mathematical model compares favorably with experimental data from literature when taking macro and mesoporosity into account. This model should be helpful in guiding the design of dynamic adsorption experiments, and to understand how heterogeneities in the rock may influence the interpretation of experimental results. Finally, capillary displacement was analyzed in an axisymmetric system, and the results were compared against a onedimensional model and experimental results obtained through experimentation. This was done to identify the benefits of simulating this type of phenomena, because, sometimes a simplified model can hide vital information for the experiments. The axisymmetric simulations were superior when showing the complete information of the phenomena but at a much higher computational cost than the one-dimensional model
- Estudio del uso de enfriamiento pasivo(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2004-05-01) Garza de León, José Gerardo; López Salinas, José Luis; García Cuéllar, Alejandro Javier; Estrada Díaz, Silvia Elizabeth; Programa de Graduados en Ingeniería; Campus MonterreyTesis presentada para obtener el grado de Maestro en ciencias especialidad en Ingeniería Energetica
- Displacement characterization of immiscible phases in consolidated porous media with experiments assisted by CFD analysis for applications.(Instituto Tecnológico y de Estudios Superiores de Monterrey) Sánchez García, Rubén Eduardo; López Salinas, José Luis; García Cuéllar, Alejandro Javier; Rivera Solorio, Carlos Iván; School of Engineering and Sciences; School of Engineering and Sciences; Campus MonterreyGeneration of experimental data in consolidated porous media to calibrate Mechanistic models of flow through porous media where capillary saturation gradients play a fundamental role in a wide range of orders of magnitude of viscous forces. Highlight the importance of contact angle dynamics and implement previous work of the research group for analysis in situ of interfacial properties, by inspection of drops emerging either from consolidated porous media, or animations of simulations of phases displaced within capillaries. Explore the possibility of recover oil from connected/ intricate bugs within fractured porous media using CFD.
- Implementation of a thermo energetic model of an electric arc furnace using static approach.(Instituto Tecnológico y de Estudios Superiores de Monterrey) Torres Vázquez, Armando; 784401; López Salinas, José Luis; Campus MonterreyIn this work two mathematical models that describe the performance of an Electric Arc Furnace (EAF) are presented: Mass and energy balances and the heat rate transfer model. The mass and energy balances use real data taken from a process of a siderurgical and is able to calculate the amount of products of the actual process. The objective of this model is to make a diagnostic of the energetic performance of the EAF and to perform a detailed description of the energy distribution within the furnace. The mass and energy balance models were validated comparing the amount of hot heel and slag calculated with the obtained during the process. In order to the model works properly, it is necessary that the input data be accurate enough. The heat transfer model predicts the temperature distributions and energy flows between the diferent elements of the EAF, from the input energy rates and mass flows of the process. This model has an analytical approach and considers the different mechanisms of heat transfer: conduction, convection and radiation. The robustness and flexibility of the model was tested varying the electric power supplied to the furnace, the arc coverage index, the slag layer thickness and the process time. The model produces similar results to the results presented in other works. Both models require relatively few computational resources for their operation.