TY - JOUR
T1 - An investigation of unsteady flow reversal of natural convection in vertical parallel plates by the modified local one-dimensional inviscid relations method
AU - Fu, Wu Shung
AU - Huang, Shang Hao
AU - Li, Chung Gang
N1 - Funding Information:
The authors gratefully acknowledge the support of the Natural Science Council , Taiwan, ROC under Contact NSC102-2221-E-009-053-MY2.
Publisher Copyright:
© 2015 Elsevier Ltd All rights reserved.
PY - 2015/7
Y1 - 2015/7
N2 - An unsteady flow reversal of natural convection in vertical parallel plates with an asymmetrically heated wall is investigated numerically. For clarifying the occurrence of flow reversal, the width of the plates is regarded as a variable, and the non-reflecting boundary condition is adopted at apertures. The methods of the Roe scheme, preconditioning and dual time stepping matching LUSGS are simultaneously used to solve governing equations which are available for a low speed compressible flow problem. The flow reversal is observed under broad width situations and absent under narrow width situations. Distributions of the pressure differences at the apertures are revealed to indicate the occurrence of flow reversal. The present Nusselt numbers, which mean time and area-averaged ones, display relatively good agreement with those of the existing works.
AB - An unsteady flow reversal of natural convection in vertical parallel plates with an asymmetrically heated wall is investigated numerically. For clarifying the occurrence of flow reversal, the width of the plates is regarded as a variable, and the non-reflecting boundary condition is adopted at apertures. The methods of the Roe scheme, preconditioning and dual time stepping matching LUSGS are simultaneously used to solve governing equations which are available for a low speed compressible flow problem. The flow reversal is observed under broad width situations and absent under narrow width situations. Distributions of the pressure differences at the apertures are revealed to indicate the occurrence of flow reversal. The present Nusselt numbers, which mean time and area-averaged ones, display relatively good agreement with those of the existing works.
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U2 - 10.1016/j.ijheatmasstransfer.2015.02.032
DO - 10.1016/j.ijheatmasstransfer.2015.02.032
M3 - Article
AN - SCOPUS:84924911730
SN - 0017-9310
VL - 86
SP - 124
EP - 138
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
ER -