An immersed boundary-discrete unified gas kinetic scheme for simulating natural convection involving curved surfaces

Li, Chao1; Wang, Lian-Ping2,3

2018-11

10.1016/j.ijheatmasstransfer.2018.04.166

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER   影响因子和分区

0017-9310

1879-2189

In this work, an immersed boundary-discrete unified gas kinetic scheme (IB-DUCKS) is proposed and presented for the simulation of natural convection with a curved body surface. In this method, two distribution functions are employed for velocity and temperature field, respectively, and they are coupled under the Boussinesq approximation. The IB-DUGKS provides an effective way for the DUGKS to treat a curved boundary. The Strang-splitting method is used to handle the IB force, and its accuracy is first validated by comparing with another implementation method for the base case of natural convection in a square cavity. The widely used direct-forcing immersed boundary method is adopted due to its simplicity, with an iteration procedure to ensure the accuracy of no-slip condition on the immersed boundary. Natural convection between an outer square and an inner circular cylinder is then simulated under different geometric configurations, including different aspect ratios and locations of the cylinder relative to the cavity. The numerical results are in excellent agreement with the results from the literature, confirming the accuracy and robustness of the proposed method. (C) 2018 Elsevier Ltd. All rights reserved.

Natural convection IB-DUGKS Strang-splitting Curved boundary

SCI ; EI

英语

通讯

U.S. National Science Foundation (NSF)[CNS1513031] ; U.S. National Science Foundation (NSF)[CBET-1235974] ; U.S. National Science Foundation (NSF)[AGS-1139743]

Thermodynamics ; Engineering ; Mechanics

Thermodynamics ; Engineering, Mechanical ; Mechanics

WOS:000442979300087

PERGAMON-ELSEVIER SCIENCE LTD

20182205262128

Aspect ratio ; Circular cylinders ; Cylinder configurations ; Distribution functions ; Iterative methods ; Kinetic theory of gases ; Natural convection ; Numerical methods ; Turbulent flow

Internal Combustion Engines, General:612.1 ; Fluid Flow, General:631.1 ; Heat Transfer:641.2 ; Computer Applications:723.5 ; Numerical Methods:921.6 ; Probability Theory:922.1

ENGINEERING

Web of Science

1.Dalian Maritime Univ, Marine Engn Coll, Dalian 116026, Liaoning, Peoples R China
2.Univ Delaware, Dept Mech Engn, Newark, DE 19716 USA
3.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Guangdong, Peoples R China

Li, Chao,Wang, Lian-Ping. An immersed boundary-discrete unified gas kinetic scheme for simulating natural convection involving curved surfaces[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2018,126:1059-1070.

Li, Chao,&Wang, Lian-Ping.(2018).An immersed boundary-discrete unified gas kinetic scheme for simulating natural convection involving curved surfaces.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,126,1059-1070.

Li, Chao,et al."An immersed boundary-discrete unified gas kinetic scheme for simulating natural convection involving curved surfaces".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 126(2018):1059-1070.