Non-local equilibrium two-phase flow model with phase change in porous media and its application to reflooding of a severely damaged reactor core

2012 ◽  
Author(s):  
A. Bachrata ◽  
F. Fichot ◽  
M. Quintard ◽  
G. Repetto ◽  
J. Fleurot
Keyword(s):  
Porous Media ◽  
Phase Change ◽  
Flow Model ◽  
Two Phase Flow ◽  
Local Equilibrium ◽  
Reactor Core ◽  
Phase Flow ◽  
Two Phase ◽  
Non Local

A non-local two-phase flow model for immiscible displacement in highly heterogeneous porous media and its parametrization

2013 ◽  
Vol 62 ◽  
pp. 475-487 ◽  
Author(s):  
Jan Tecklenburg ◽  
Insa Neuweiler ◽  
Marco Dentz ◽  
Jesus Carrera ◽  
Sebastian Geiger ◽  
...  
Keyword(s):  
Porous Media ◽  
Flow Model ◽  
Two Phase Flow ◽  
Heterogeneous Porous Media ◽  
Immiscible Displacement ◽  
Phase Flow ◽  
Two Phase ◽  
Non Local

Binary two-phase flow with phase change in porous media

2001 ◽  
Vol 27 (3) ◽  
pp. 477-526 ◽  
Author(s):  
S. Békri ◽  
O. Vizika ◽  
J.-F. Thovert ◽  
P.M. Adler
Keyword(s):  
Porous Media ◽  
Phase Change ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

scholarly journals A three-dimensional two-phase flow model with phase change inside a tube of petrochemical pre-heaters

Fuel ◽  
2013 ◽  
Vol 110 ◽  
pp. 196-203 ◽  
Author(s):  
D.V.R. Fontoura ◽  
E.M. Matos ◽  
J.R. Nunhez
Keyword(s):  
Phase Change ◽  
Flow Model ◽  
Two Phase Flow ◽  
Three Dimensional ◽  
Phase Flow ◽  
Two Phase

scholarly journals Modeling and Numerical Investigation of Transient Two-Phase Flow with Liquid Phase Change in Porous Media

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 183
Author(s):  
Fei He ◽  
Wenjie Dong ◽  
Jianhua Wang
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Liquid Phase ◽  
Phase Change ◽  
Two Phase Flow ◽  
Transient Heat Transfer ◽  
Phase Flow ◽  
Two Phase ◽  
Heat Transfer Deterioration ◽  
Temperature Structure Parameter

Two-phase flow with phase change in microstructure or nanostructure is an important issue in many fronts and critical applications nowadays, but with a lack of comprehensive understanding of the mechanism. This paper numerically investigates the transient behavior of two-phase flow with liquid phase change in the porous media, which consists of a series of connected pores at micro and nanoscale with the transient form of the semi-mixed model and self-compiled programs. Transient variation and spatial distribution of structure temperature, thermal non-equilibrium characteristic, phase change location and fluid-driven pressure are obtained and analyzed, and effects of initial system temperature, structure parameter and material property on the transient behaviors of two-phase flow and fluid-structure coupling heat transfer are discussed. The numerical simulations indicate that the two-phase flow with phase change in porous media is complex and ever-changing before reaching a steady state and affected by the above-mentioned three kinds of parameters significantly. Particularly, distinct phenomena of transient heat transfer deterioration and vapor block are discovered, and it is revealed that the transient heat transfer deterioration and vapor block are more serious in a porous matrix with smaller porosity and made of materials with higher heat capacity and density.

A Graphic Processing Unit (GPU) based implementation of an incompressible two-phase flow model in porous media

2018 ◽  
Vol 57 (3) ◽  
pp. 205-222
Author(s):  
V. Leonardo Teja-Juárez ◽  
Luis M. De la Cruz
Keyword(s):  
Porous Media ◽  
Flow Model ◽  
Two Phase Flow ◽  
Graphic Processing Unit ◽  
Processing Unit ◽  
Phase Flow ◽  
Two Phase ◽  
Newton Raphson ◽  
Graphic Processing

En este trabajo se presenta una estrategia de paralelización de un simulador completamente implícito para la solución numérica del modelo de flujo bifásico incompresible en medios porosos usando unidades de procesamiento gráfico (GPU, por sus siglas en inglés). El modelo matemático está basado en las ecuaciones de conservación de masa para las fases agua y aceite. Se utiliza la formulación PresiónSaturación para simplificar el modelo numérico. La técnica de Volumen Finito y el método de Newton-Raphson se usan para discretizar y linealizar las ecuaciones diferenciales parciales, respectivamente. Se propone la construcción del Jacobiano directamente en la GPU, lo que reduce la información que debe intercambiarse entre la CPU (Unidad Central de Procesamiento CPU, por sus siglas en inglés) y la GPU. El simulador utiliza bibliotecas que ya incluyen los métodos del subespacio de Krylov para resolver sistemas de ecuaciones lineales. Se comparan los resultados de tres problemas de referencia utilizando diferentes tamaños de malla. También se evalúa el rendimiento del código numérico desarrollado. Los resultados de la GPU versus CPU indican que el simulador numérico alcanzó hasta 22x de aceleración para construir el Jacobiano y 3x de aceleración para ejecutar el código numérico completo usando la paralelización GPU.

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