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Title:Modeliranje turbulentega toka v porozni snovi
Authors:ID Kramer Stajnko, Janja (Author)
ID Jecl, Renata (Author)
ID Škerget, Leopold (Author)
Files:URL http://www.drustvozamehaniko.si/zbornik/ZbornikKD2009.pdf
 
Language:Slovenian
Work type:Unknown
Typology:1.08 - Published Scientific Conference Contribution
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:V prispevku je predstavljen pristop k modeliranju turbulentnega toka v porozni snovi. Matematični model temelji na uporabi klasičnih Navier-Stokesovih enačb za čisto tekočino, ki so v osnovi zapisane na mikroskopskem nivoju. V primeru obravnavanja turbulence v porozni snovi je potrebno posebej modelirati turbulenco (časovno nihanje spremenljivk) ter transportne pojave v porozni snovi (prostorsko spreminjanje). Vodilne enačbe se tako časovno in prostorsko povprečijo, pri čemer se izkaže, da različen vrstni red povprečenja vodi do drugačnih modelov. Za numerično reševanje tovrstnih problemov bo uporabljena Robno Območna Integralska Metoda (ROIM) zato so predstavljene njene osnovne značilnosti.
Keywords:porozna snov, turbulentni tok, Navier-Stokesove enačbe, turbulence, robno območna integralska metoda
Year of publishing:2009
PID:20.500.12556/DKUM-26487 New window
UDC:532
COBISS.SI-ID:13456662 New window
NUK URN:URN:SI:UM:DK:X5YHGWIX
Publication date in DKUM:31.05.2012
Views:2447
Downloads:84
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Secondary language

Language:English
Title:Modeling of turbulent flow in porous media
Abstract:In the present paper a methodology for developing turbulence model in porous media is presented. The mathematical model bases on the classical Navier-Stokes equations for pure fluid flow, which are generally written on the microscopic level. To consider turbulence in porous media first modeling of turbulence (time variation) and then modeling of transport phenomena in porous media (space variation) has to be performed. The time averaging and space averaging have to be applied to the governing equations, where differentaveraging order lead to distinct sets of turbulence equations. For the numerical solution of the obtained set of equations the Boundary Domain Integral Method (BDIM) will be used which is also presented in the paper.


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