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A flux conserving meshfree method for conservation laws

 
: Suchde, P.; Kuhnert, J.; Schröder, S.; Klar, A.

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International journal for numerical methods in engineering 112 (2017), No.3, pp.238-256
ISSN: 0029-5981
English
Journal Article
Fraunhofer ITWM ()

Abstract
Lack of conservation has been the biggest drawback in meshfree generalized finite difference methods(GFDMs). In this paper, we present a novel modification of classical meshfree GFDMs to include local balances which produce an approximate conservation of numerical fluxes. This numerical flux conservation is performed within the usual moving least squares framework. Unlike Finite Volume Methods, it is based on locally defined control cells, rather than a globally defined mesh. We present the application of this method to an advection diffusion equation and the incompressible Navier-Stokes equations. Our simulations show that the introduction of flux conservation significantly reduces the errors in conservation in meshfree GFDMs.

: http://publica.fraunhofer.de/documents/N-480407.html