izpis_h1_title_alt

On the finite volume discretization of discontinuous body force field on collocated grid : application to VOF method
Mencinger, Jure (Avtor), Žun, Iztok (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://dx.doi.org/10.1016/j.jcp.2006.06.021 Novo okno

Izvleček
Discontinuities in the body force field typically appear at the interface of two fluid systems. Modeled with the volume-of-fluid (VOF) and discretized withthe finite volume method, the discontinuous body force fields are represented as abruptly variable. In the present study, gravity and continuum surface force (CSF) are considered. Such strongly variable body forces can produce unphysical spikes in the velocity field when collocated variable arrangement is used. The spikes can be eliminated following a force field discretization rule which is deduced by imposing a constraint requiring a zero velocity solution when the forces applied to the system are equilibrated with the gradient of the pressure field. It is shown (as a byproduct of the present work) that a zero velocity solution can only be obtained if the force field is conservative on the discrete level, which applies also for the studied case of a stationary bubble. Finally, the case of a rising bubble demonstrates that the proposed rule should be obeyed generally although it is obtained for a quiescent fluid.

Jezik:Angleški jezik
Ključne besede:dvofluidno modeliranje, metode končnih volumnov, diskretiyacija telesa, hitrostna polja, površinske sile, numerične metode, collocated grid, body force, volume-of-fluid, continuum surface force, parasitic currents
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2007
Št. strani:str. 524-538
Številčenje:Letn. 221, št. 2
UDK:531/533:519.6
ISSN pri članku:0021-9991
COBISS.SI-ID:9848347 Povezava se odpre v novem oknu
Število ogledov:412
Število prenosov:117
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je del revije

Naslov:Journal of computational physics
Skrajšan naslov:J. comput. phys.
Založnik:Elsevier
ISSN:0021-9991
COBISS.SI-ID:989199 Novo okno

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