Please use this identifier to cite or link to this item: https://doi.org/10.1002/fld.2245
Title: A local domain-free discretization method for simulation of incompressible flows over moving bodies
Authors: Zhou, C.H.
Shu, C. 
Keywords: Domain-free discretization
Incompressible flows
Moving boundaries
Non-boundary conforming method
Oscillating airfoil
Oscillating cylinder
Issue Date: 20-May-2011
Source: Zhou, C.H.,Shu, C. (2011-05-20). A local domain-free discretization method for simulation of incompressible flows over moving bodies. International Journal for Numerical Methods in Fluids 66 (2) : 162-182. ScholarBank@NUS Repository. https://doi.org/10.1002/fld.2245
Abstract: This paper presents a local domain-free discretization (DFD) method for the simulation of unsteady flows over moving bodies governed by the incompressible Navier-Stokes equations. The discretization strategy of DFD is that the discrete form of partial differential equations at an interior point may involve some points outside the solution domain. All the mesh points are classified as interior points, exterior dependent points and exterior independent points. The functional values at the exterior dependent points are updated at each time step by the approximate form of solution near the boundary. When the body is moving, only the status of points is changed and the mesh can stay fixed. The issue of 'freshly cleared nodes/cells' encountered in usual sharp interface methods does not pose any particular difficulty in the presented method. The Galerkin finite-element approximation is used for spatial discretization, and the discrete equations are integrated in time via a dual-time-stepping scheme based on artificial compressibility. In order to validate the present method for moving-boundary flow problems, two groups of flow phenomena have been simulated: (1) flows over a fixed circular cylinder, a harmonic in-line oscillating cylinder in fluid at rest and a transversely oscillating cylinder in uniform flow; (2) flows over a pure pitching airfoil, a heaving-pitching airfoil and a deforming airfoil. The predictions show good agreement with the published numerical results or experimental data. © 2010 John Wiley & Sons, Ltd.
Source Title: International Journal for Numerical Methods in Fluids
URI: http://scholarbank.nus.edu.sg/handle/10635/54311
ISSN: 02712091
DOI: 10.1002/fld.2245
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

17
checked on Dec 5, 2017

WEB OF SCIENCETM
Citations

13
checked on Oct 29, 2017

Page view(s)

35
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.