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A momentum exchange-based immersed boundary-lattice Boltzmann method for simulating a flexible filament in an incompressible flow.
- Source :
-
Computers & Mathematics with Applications . Mar2014, Vol. 67 Issue 5, p1039-1056. 18p. - Publication Year :
- 2014
-
Abstract
- Abstract: A momentum exchange-based immersed boundary-lattice Boltzmann method, which is used to solve the fluid–flexible-structure-interaction problem, is introduced in this paper. The present method, overcoming the drawback of the conventional penalty method employing a user-defined spring parameter for calculating the interaction force induced by the immersed boundary, uses a concept of momentum exchange on the boundary to calculate the interaction force. Numerical examples, including a laminar flow past a circular cylinder, a filament flapping in the wake of the cylinder, a single filament with the upstream end fixed flapping in a uniform flow field and the interaction of two filaments flapping in the flow, are provided to validate the present method and to illustrate its capability of dealing with the fluid–flexible-structure-interaction problem. Particularly, with considering the filament mass effects, a single filament with a fixed centre point undergoing a bending transition in the flow is firstly studied in the present paper. Our numerical results compare qualitatively well to experimental results. For a single filament with a fixed centre point, it is found that the flexure modulus has a significant effect on the final state of the filament: for a larger flexure modulus, the filament reaches the ‘quasi-steady’ state finally; for a small flexure modulus, the filaments will be flapping like two filaments. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 08981221
- Volume :
- 67
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Computers & Mathematics with Applications
- Publication Type :
- Academic Journal
- Accession number :
- 94577694
- Full Text :
- https://doi.org/10.1016/j.camwa.2014.01.006