A parallel high-order method for simulating vortex-induced vibrations

QIU Zihua; XU Min; ZHANG Bin; LIANG Chunlei

doi:10.7527/S1000-6893.2018.22483

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2019 , Vol. 40 >Issue 3: 122483 - 122483

DOI: https://doi.org/10.7527/S1000-6893.2018.22483

Fluid Mechanics and Flight Mechanics

A parallel high-order method for simulating vortex-induced vibrations

QIU Zihua ,
XU Min ,
ZHANG Bin ,
LIANG Chunlei

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1. School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, D.C. 20052, United States

Received date: 2018-06-26

Revised date: 2018-08-28

Online published: 2018-10-19

Supported by

National Natural Science Foundation of China (11602296, 11802179)

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Abstract

This paper presents a parallel high-order method for simulating Vortex-Induced Vibrations (VIV) at very challenging situations, such as vibrations of very closely placed solid objects or a row of multiple objects with large relative displacements. This method works on unstructured triangular/quadrilateral hybrid grids by employing the high-order Spectral Difference (SD) method for spatial discretization. By introducing nonuniform sliding meshes, a computational domain is split into several non-overlapping subdomains, and each subdomain can enclose an object and move freely with respect to its neighbors. The two sides of a sliding interface are coupled through a newly developed nonuniform mortar method. A monolithic approach is adopted to seamlessly couple the fluid and the solid vibration equations. Parallelization strategy is studied and achieved by message passing interface implementation. Through a series of numerical tests, we demonstrate that the present method is high-order accurate for both inviscid and viscous flows; for steady uniform flow, the solver can assure free stream preservation; single cylinder VIV simulation agrees well with previous simulations, which verifies the reliability of the method; mesh deformation can be easily applied even when the deformation of the flow field is complicated, and high parallel efficiency can be achieved at the same time.

Key words： fluid-structure interaction; high-order scheme; spectral difference method; sliding-mesh; vortex-induced vibration; parallel computing

Cite this article

QIU Zihua , XU Min , ZHANG Bin , LIANG Chunlei . A parallel high-order method for simulating vortex-induced vibrations[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019 , 40(3) : 122483 -122483 . DOI: 10.7527/S1000-6893.2018.22483

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