A NOVEL FLEXIBLE FORCING HYBRID IB-LBM SCHEME TO SIMULATE FLOW PAST CIRCULAR CYLINDER

Sunil Manohar Dash (), Thong-See Lee () and Haibo Huang ()
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Sunil Manohar Dash: Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore
Thong-See Lee: Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore
Haibo Huang: Department of Modern Mechanics, University of Science and Technology of China, 230026, P. R. China

International Journal of Modern Physics C (IJMPC), 2014, vol. 25, issue 01, 1-8

Abstract: A novel flexible forcing immersed boundary and lattice Boltzmann method (IB-LBM) is introduced in this paper. In the conventional IB-LBM scheme, explicit calculation of the force density term may not guarantee exact satisfaction of the no-slip boundary condition. This produces unphysical streamline penetration into the solid object. In this study, an implicit approach is followed where the force density is obtained from the unknown velocity correction with a unique single Lagrangian velocity correction term and flexible number of forcing steps. The proposed algorithm is computationally efficient and easy for new code development. Also the algorithm is found advantageous for unsteady flow case where no-slip condition is accurately satisfied. Flow past circular cylinder is studied for both steady and unsteady flow cases to validate the proposed scheme.

Keywords: Immersed boundary method; lattice Boltzmann method; flexible forcing; circular cylinder (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1142/S0129183113400147

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