TY - JOUR
T1 - Direct numerical simulation of natural convection between an enclosure and multiple circular cylinders
T2 - An influence of horizontal arrangement of cylinders
AU - Pandey, Sudhanshu
AU - Jakkareddy, Pradeep S.
AU - Seo, Young Min
AU - Ha, Man Yeong
N1 - Funding Information:
This work was supported by a 2-Year Research Grant of Pusan National University .
Publisher Copyright:
© 2022 Elsevier Ltd. All rights reserved.
PY - 2022/8
Y1 - 2022/8
N2 - The work involves a three-dimensional numerical analysis of the buoyancy-driven heat transfer in an enclosure having four heated cylinders for Rayleigh number, Ra = 104-106, and Prandtl number, Pr = 0.7. An in-house direct numerical simulation code, finite volume-based immersed boundary method incorporates the inner cylinder's virtual wall boundary and computes the governing transport equations. Heat and flow characteristics at different Ra and spacing between cylinders are discussed by using three-dimensional vortices and isotherms. The effect of heat and flow on three-dimensionality and heat transfer features are captured and reported. Limitations of two-dimensional simulation for capturing the physics of the problem and the importance of the three-dimensional analysis for the present study are highlighted.
AB - The work involves a three-dimensional numerical analysis of the buoyancy-driven heat transfer in an enclosure having four heated cylinders for Rayleigh number, Ra = 104-106, and Prandtl number, Pr = 0.7. An in-house direct numerical simulation code, finite volume-based immersed boundary method incorporates the inner cylinder's virtual wall boundary and computes the governing transport equations. Heat and flow characteristics at different Ra and spacing between cylinders are discussed by using three-dimensional vortices and isotherms. The effect of heat and flow on three-dimensionality and heat transfer features are captured and reported. Limitations of two-dimensional simulation for capturing the physics of the problem and the importance of the three-dimensional analysis for the present study are highlighted.
KW - Horizontal spacing between inner cylinders
KW - Immersed boundary method
KW - Natural convection
KW - Rectangular channel
KW - Three-dimensionality
UR - http://www.scopus.com/inward/record.url?scp=85132715431&partnerID=8YFLogxK
U2 - 10.1016/j.csite.2022.102205
DO - 10.1016/j.csite.2022.102205
M3 - Article
AN - SCOPUS:85132715431
SN - 2214-157X
VL - 36
JO - Case Studies in Thermal Engineering
JF - Case Studies in Thermal Engineering
M1 - 102205
ER -