TY - JOUR
T1 - Buoyancy-assisted flow reversal and convective heat transfer in entrance region of a vertical rectangular duct
AU - Cheng, Chin Hsiang
AU - Weng, Chun Jen
AU - Aung, Win
N1 - Funding Information:
The financial support of this study by National Science Council, Republic of China, under grant NSC 81-0401-E036-509, is gratefully acknowledged.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2000/8
Y1 - 2000/8
N2 - In this study, predictions of buoyancy-assisted flow reversal and convective heat transfer in the entrance region of a vertical rectangular duct are reported for the first time. In line with the current trend toward the use of computationally efficient numerical methods, the present study is based on the use of a three-dimensional parabolic, boundary-layer model and the FLARE approximation. Physical situations investigated include cases with various asymmetric heating conditions over wide ranges of parameters. Analytical solutions for the fully developed flows are also presented, and the criteria for the flow reversal to occur are predicted. Solutions for the developing flow obtained in this study agree closely with the elliptic-model solutions, and precisely approch the fully developed solutions downstream. (C) 2000 Elsevier Science Inc. All rights reserved.
AB - In this study, predictions of buoyancy-assisted flow reversal and convective heat transfer in the entrance region of a vertical rectangular duct are reported for the first time. In line with the current trend toward the use of computationally efficient numerical methods, the present study is based on the use of a three-dimensional parabolic, boundary-layer model and the FLARE approximation. Physical situations investigated include cases with various asymmetric heating conditions over wide ranges of parameters. Analytical solutions for the fully developed flows are also presented, and the criteria for the flow reversal to occur are predicted. Solutions for the developing flow obtained in this study agree closely with the elliptic-model solutions, and precisely approch the fully developed solutions downstream. (C) 2000 Elsevier Science Inc. All rights reserved.
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U2 - 10.1016/S0142-727X(00)00005-9
DO - 10.1016/S0142-727X(00)00005-9
M3 - Article
AN - SCOPUS:0034253436
SN - 0142-727X
VL - 21
SP - 403
EP - 411
JO - International Journal of Heat and Fluid Flow
JF - International Journal of Heat and Fluid Flow
IS - 4
ER -