期刊
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
卷 94, 期 11, 页码 1863-1887出版社
WILEY
DOI: 10.1002/fld.5130
关键词
edge-based smoothed finite element method; fluid-structure interaction; geometric conservation law; gradient smoothing; multiple bluff bodies; vortex-induced vibration
类别
资金
- Natural Science Foundation of Shanghai [19ZR1437200]
This article proposes an edge-based smoothed finite element method (ESFEM) for predicting vortex-induced vibration (VIV) of multiple rigid and elastic structures. The method discretizes the Navier-Stokes and elastodynamic equations, uses triangular elements, and considers fluid excitation and dynamic grid movement. The technique is formulated under the arbitrary Lagrangian-Eulerian description, respecting the geometric conservation law. It has been validated against low Reynolds number VIV problems with accurate predictions of flow features and structural responses.
This article proposes an edge-based smoothed finite element method (ESFEM) for predicting vortex-induced vibration (VIV) of multiple rigid and elastic structures. The ESFEM is applied to discretize the Navier-Stokes and elastodynamic equations with three-node triangular (T3) element. The fluid excitation is also evaluated in the edge-based notion. New integration points are arranged in local smoothing domains to ease the resultant approximation. Dynamic grids are moved by an efficient two-level mesh scheme. The fluid-structure mechanical system is formulated under the arbitrary Lagrangian-Eulerian description which enables tight coupling of interacting fields in a partitioned way. Especially, the geometric conservation law is respected for the ESFEM through a mass source term constructed in the T3 element context. The developed technique is validated against previously published data for three low-Reynolds-number VIV problems. Flow features and structural responses have been correctly identified therein as a result of the numerical prediction.
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