A unified numerical model for simulating heat transfer in flows past porous bodies

Chen, Hao1,2,3; Zhao, Haibo2,3; Huang, Tao2,3; Yu, Peng2,3; Shu, Chang1,4

2023-05-01

10.1002/nme.7290

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING   影响因子和分区

0029-5981

1097-0207

A unified numerical model for simulating thermal flows past and through porous media whose thermal properties are identical with those of the surrounding fluid is proposed in this paper, which advances the work of the unified immersed boundary-lattice Boltzmann flux solver (UIB-LBFS). The proposed method greatly simplifies the conventional computation procedure for thermal flows past porous bodies by unifying the governing equations for the flow and temperature fields in both the porous and fluid domains. This is achieved by introducing a diffuse layer, across which the variation of the flow properties including its thermal features are expected to be smooth. Also, the developed method can be applied on either uniform or nonuniform grid since the numerical fluxes are locally reconstructed by LBFS at cell interfaces. In addition, the boundary conditions for both the flow and temperature fields at the porous-fluid interface with complex shape can be implemented through IBM in a simple way. The proposed method is validated by several numerical examples over wide ranges of thermal parameters from forced convection to mixed convection. Excellent agreements are obtained for all simulations, including the one with severe temperature gradient in the thin temperature boundary layer at Pr = 10, which demonstrates the capabilities of the proposed method.

heat transfer immersed boundary method porous-fluid interface unified model

SCI ; EI

英语

通讯

National Natural Science Foundation of China (NSFC)["12172163","91852205"]

Engineering ; Mathematics

Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications

WOS:000993990400001

WILEY

20232114137267

Boundary layers ; Heat transfer ; Numerical methods ; Porous materials ; Turbulent flow

Fluid Flow, General:631.1 ; Heat Transfer:641.2 ; Mathematics:921 ; Numerical Methods:921.6 ; Materials Science:951

ENGINEERING

Web of Science

1.Natl Univ Singapore, Dept Mech Engn, Singapore, Singapore
2.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen, Peoples R China
3.Southern Univ Sci & Technol, Ctr Complex Flows & Soft Matter Res, Shenzhen 518055, Peoples R China
4.Natl Univ Singapore, Dept Mech Engn, 10 Kent Ridge Crescent, Singapore 119260, Singapore

Chen, Hao,Zhao, Haibo,Huang, Tao,et al. A unified numerical model for simulating heat transfer in flows past porous bodies[J]. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING,2023,124(17):3767-3795.

Chen, Hao,Zhao, Haibo,Huang, Tao,Yu, Peng,&Shu, Chang.(2023).A unified numerical model for simulating heat transfer in flows past porous bodies.INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING,124(17),3767-3795.

Chen, Hao,et al."A unified numerical model for simulating heat transfer in flows past porous bodies".INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 124.17(2023):3767-3795.