A remeshed vortex method for mixed rigid/soft body fluid-structure interaction

JOURNAL OF COMPUTATIONAL PHYSICS

卷:444

Article

Bhosale, Yashraj¹  Parthasarathy, Tejaswin¹  Gazzola, Mattia^1,2,3 

[1] Univ Illinois, Mech Sci & Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61801 USA

[3] Univ Illinois, Carl R Woese Inst Genom Biol, Urbana, IL 61801 USA

关键词: Remeshed vortex method;    Brinkman penalization;    Inverse map;    Soft body;    Multiphysics;    Flow-structure interaction;   

DOI  :  10.1016/j.jcp.2021.110577

来源: Elsevier

【 摘 要 】

We outline a 2D algorithm for solving incompressible flow-structure interaction problems for mixed rigid/soft body representations, within a consistent framework based on the remeshed vortex method. We adopt the one-continuum formulation to represent both solid and fluid phases on an Eulerian grid, separated by a diffuse interface. Rigid solids are treated using Brinkman penalization while an inverse map technique is used to obtain elastic stresses in the hyperelastic solid phase. We test our solver against a number of benchmark problems, which demonstrate physical accuracy and first to second order convergence in space and time. Benchmarks are complemented by additional investigations that illustrate the ability of our numerical scheme to capture essential fluid-structure interaction phenomena across a variety of scenarios involving internal muscular actuation, self propulsion, multi-body contact, heat transfer and rectified viscous streaming effects. Through these illustrations, we showcase the ability of our solver to robustly deal with different constitutive models and boundary conditions, solve disparate multi-physics problems and achieve faster time-to-solutions by sidestepping CFL time step restrictions. (C) 2021 Elsevier Inc. All rights reserved.

【 授权许可】

Free