TY - JOUR
T1 - Numerical study of boiling and natural convection in capillary porous media using the two-phase mixture model
AU - Wang, C. Y.
AU - Beckermann, C.
AU - Fan, C.
N1 - Funding Information:
Received 25 January 1993; accepted 7 December 1993. Support for this research by the National Science Foundation through grant crS-8957149 and by a University of Iowa Carver Scientific Research Initiative Grant is gratefully acknowledged. Address correspondence to C. Beckermann, Department of Mechanical Engineering, University of Iowa, towa City, 1A 52242, USA.
PY - 1994/10
Y1 - 1994/10
N2 - A newly developed two-phase mixture model is applied, in conjunction with a control-volume-based finite difference method, to numerically investigate boiling with thermal convection in a porous layer heated from below. The numerical procedure employs a fixed grid and avoids tracking explicitly the moving interface between the liquid and two-phase regions. Numerical results are obtained to shed light on the intricate interactions between boiling and natural convection as well as to explain experimental observations. Four distinct flow patterns that were observed in previous experiments are predicted. A quantitative comparison of the predicted and measured vapor volume fraction in the porous bed shows good agreement. The numerical results also agree with published linear stability results. In addition, the present study documents the effects of important parameters such as Rayleigh number, bottom heat flux, and aspect ratio.
AB - A newly developed two-phase mixture model is applied, in conjunction with a control-volume-based finite difference method, to numerically investigate boiling with thermal convection in a porous layer heated from below. The numerical procedure employs a fixed grid and avoids tracking explicitly the moving interface between the liquid and two-phase regions. Numerical results are obtained to shed light on the intricate interactions between boiling and natural convection as well as to explain experimental observations. Four distinct flow patterns that were observed in previous experiments are predicted. A quantitative comparison of the predicted and measured vapor volume fraction in the porous bed shows good agreement. The numerical results also agree with published linear stability results. In addition, the present study documents the effects of important parameters such as Rayleigh number, bottom heat flux, and aspect ratio.
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U2 - 10.1080/10407789408955999
DO - 10.1080/10407789408955999
M3 - Article
AN - SCOPUS:0028524265
SN - 1040-7782
VL - 26
SP - 375
EP - 398
JO - Numerical Heat Transfer; Part A: Applications
JF - Numerical Heat Transfer; Part A: Applications
IS - 4
ER -