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Naslov:The wavelet transform for BEM computational fluid dynamics
Avtorji:ID Ravnik, Jure (Avtor)
ID Škerget, Leopold (Avtor)
ID Hriberšek, Matjaž (Avtor)
Datoteke:URL http://dx.doi.org/10.1016/j.enganabound.2004.05.002
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Opis:A wavelet matrix compression technique was used to solve systems of linear equations resulting from BEM applied to fluid dynamics. The governing equations were written in velocity-vorticity formulation and solutions of the resulting systems of equations were obtained with and without wavelet matrix compression. A modification of the Haar wavelet transform, which can transformvectors of any size, is proposed. The threshold, used for making fully populated matrices sparse, was written as a product of a user defined factor and the average value of absolute matrix elements values. Numerical tests were performed to assert, that the error caused by wavelet compression depends linearly on the factor , while the dependence of the error on the share of thresholded elements in the system matrix is highly non-linear. The results also showed that the increasing non-linearity (higher Ra and Re numbervalues) limits the extent of compression. On the other hand, higher meshdensity enables higher compression ratios.
Ključne besede:fluid mechanics, computational fluid dynamics, boundary element method, wavelet transform, linear systems of equations, velocity vorticity formulation, driven cavity, natural convection, system matrix compression
Leto izida:2004
PID:20.500.12556/DKUM-27534 Novo okno
UDK:532.5:519.61/.64
COBISS.SI-ID:9039126 Novo okno
ISSN pri članku:0955-7997
NUK URN:URN:SI:UM:DK:ORYNNC5B
Datum objave v DKUM:01.06.2012
Število ogledov:2110
Število prenosov:94
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Področja:Ostalo
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Gradivo je del revije

Naslov:Engineering analysis with boundary elements
Skrajšan naslov:Eng. anal. bound. elem.
Založnik:Elsevier
ISSN:0955-7997
COBISS.SI-ID:5605380 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:mehanika fluidov, računalniška dinamika tekočin, metoda robnih elementov, valčna transformacija, sistem linearnih enačb, hitrostno vrtinčni zaapis, kotanja, naravna konvekcija


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