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Naslov:Fast single domain-subdomain BEM algorithm for 3D incompressible fluid flow and heat transfer
Avtorji:Ravnik, Jure (Avtor)
Škerget, Leopold (Avtor)
Žunič, Zoran (Avtor)
Datoteke:URL http://dx.doi.org/10.1002/nme.2467
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano ()
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Opis:In this paper acceleration and computer memory reduction of an algorithm for the simulation of laminar viscous flows and heat transfer is presented. The algorithm solves the velocity-vorticity formulation of the incompressible Navier-Stokes equations in 3D. It is based on a combination of a subdomain boundary element method (BEM) and single domain BEM. The CPU time and storage requirements of the single domain BEM are reduced by implementing a fast multipole expansion method. The Laplace fundamental solution, which is used as a special weighting function in BEM, is expanded in terms of spherical harmonics. The computational domain and its boundary are recursively cut up forming a tree of clusters of boundary elements and domain cells. Data sparse representation is used in parts of the matrix, which correspond to boundary-domain clusters pairs that are admissible for expansion. Significant reduction of the complexity is achieved. The paper presents results of testing of the multipole expansion algorithm by exploring its effect on the accuracy of the solution and its influence on the non-linear convergence properties of the solver. Two 3D benchmark numerical examples are used: the lid-driven cavity and the onset of natural convection in a differentially heated enclosure.
Ključne besede:boundary element method, fast multipole method, fluid flow, heat transfer, velocity-vorticity fomulation
Leto izida:2009
UDK:532.7:519.61/.64
COBISS_ID:13066774 Povezava se odpre v novem oknu
ISSN pri članku:0029-5981
NUK URN:URN:SI:UM:DK:3AWPQCYX
Število ogledov:1262
Število prenosov:37
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Področja:Ostalo
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Gradivo je del revije

Naslov:International journal for numerical methods in engineering
Skrajšan naslov:Int. j. numer. methods eng.
Založnik:Wiley
ISSN:0029-5981
COBISS.SI-ID:6316039 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:metoda robnih elementov, metoda hitrih multipolov, tok tekočine, prenos toplote, hitrostno vrtinčna formulacija


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