Numerical simulation of complete liquid vapour phase change process inside porous media using smoothing of diffusion coefficient

被引：34

作者：

Alomar, Omar Rafae ^{[1
,2
]}

Mendes, Miguel A. A. ^{[1
]}

Trimis, Dimosthenis ^{[1
,3
]}

Ray, Subhashis ^{[1
]}

机构：

[1] Tech Univ Bergakad Freiberg, Inst Thermal Engn, D-09596 Freiberg, Germany

[2] Tech Coll Mosul, Mosul, Iraq

[3] Karlsruhe Inst Technol, Engler Bunte Inst, D-76131 Karlsruhe, Germany

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2014年 / 86卷

关键词：

Porous media; Complete phase change; Two-phase mixture model; Effective diffusion coefficient; Smoothing; EFFECTIVE THERMAL-CONDUCTIVITY; VERTICAL CAPILLARY STRUCTURE; HEAT-TRANSFER; 2-PHASE FLOW; NATURAL-CONVECTION; MODEL; ALGORITHM; MASS; GAS;

D O I：

10.1016/j.ijthermalsci.2014.08.003

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The present paper deals with numerical simulations of complete phase change process inside porous media, based on the two-phase mixture model, using finite volume method for discretisation. The investigation proposes a successful remedy in order to eliminate the occurrence of "jump" in predicted properties, by introducing an efficient smoothing algorithm for the effective diffusion coefficient. A thorough parametric study also indicates that the adoption of proposed remedy does not alter the true or expected solution. All tested cases, covering applicable ranges of parametric variations, could be physically interpreted. The methodology is, therefore, recommended for future simulations of complete phase change processes within porous media. (C) 2014 Elsevier Masson SAS. All rights reserved.

引用

页码：408 / 420

页数：13

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