Moving overlapping grid methodology of spectral accuracy for incompressible flow solutions around rigid bodies in motion

Brandon E. Merrill, Yulia Peet

Research output: Contribution to journalArticle

Abstract

The simulation of fluid flow around moving rigid bodies has proven to be a difficult task for traditional computational fluid dynamics solvers. Decomposing the global domain into overlapping subdomains and allowing each subdomain to move independently, permits solutions to many flow problems with complex moving geometries to be determined in a straightforward manner. The present development of the moving overlapping grid method is built within a spectral element method incompressible flow solver, and uses an Arbitrary Lagrangian-Eulerian formulation of the governing equations to prescribe subdomain motions. The method maintains global spectral spatial accuracy across the subdomains with the polynomial refinement. The global high-order temporal accuracy of the method is also maintained through subdomain coupling enforced by an explicit interface temporal extrapolation scheme. The method produces aerodynamic forces and vortex shedding around two- and three-dimensional moving rigid bodies that is in line with published experimental and computational data. Additionally, the method achieves near linear computational scaling to thousands of cores.

Original languageEnglish (US)
Pages (from-to)121-151
Number of pages31
JournalJournal of Computational Physics
Volume390
DOIs
StatePublished - Aug 1 2019

Fingerprint

incompressible flow
Incompressible flow
Vortex shedding
rigid structures
Incompressible Flow
Extrapolation
Rigid Body
Interfaces (computer)
Overlapping
Flow of fluids
Aerodynamics
Computational fluid dynamics
grids
Polynomials
methodology
Grid
aerodynamic forces
vortex shedding
Geometry
Motion

Keywords

  • Domain decomposition
  • Moving grids
  • Navier-Stokes equations
  • Spectral elements

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Computer Science Applications

Cite this

Moving overlapping grid methodology of spectral accuracy for incompressible flow solutions around rigid bodies in motion. / Merrill, Brandon E.; Peet, Yulia.

In: Journal of Computational Physics, Vol. 390, 01.08.2019, p. 121-151.

Research output: Contribution to journalArticle

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