Matej Zadravec (Author), Matjaž Hriberšek (Author), Leopold Škerget (Author)

Abstract

The contribution deals with numerical simulation of natural convection in micropolar fluids, describing flow of suspensions with rigid and underformable particles with own rotation. The micropolar fluid flow theory is incorporated into the framework of a velocity-vorticity formulation of Navier-Stokes equations. The governing equations are derived in differential and integral form, resulting from the application of a boundary element method (BEM). In integral transformations, the diffusion-convection fundamental solution for flow kinetics, including vorticity transport, heat transport and microrotation transport, is implemented. The natural convection test case is the benchmark case of natural convection in a square cavity, and computations are performed for Rayleigh number values up to 107. The results show, which microrotation of particles in suspension in general decreases overall heat transfer from the heated wall and should not therefore be neglected when computing heat and fluid flow of micropolar fluids.

Keywords

natural convection;micropolar fluid;boundary element method;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FS - Faculty of Mechanical Engineering
UDC: 532.7:519.61/.64
COBISS: 13040150 Link will open in a new window
ISSN: 0955-7997
Views: 1893
Downloads: 93
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Other data

Secondary language: English
URN: URN:SI:UM:
Pages: str. 485-492
Volume: ǂVol. ǂ33
Issue: ǂno. ǂ4
Chronology: Apr. 2009
Keywords (UDC): mathematics;natural sciences;naravoslovne vede;matematika;physics;fizika;fluid mechanics in general;mechanics of liquids (hydromechanics);mehanika tekočin;mehanika kapljevin;kinetic theory of liquids;osmosis;solution and solutions;mathematics;natural sciences;naravoslovne vede;matematika;mathematics;matematika;computational mathematics;numerical analysis;računska matematika;numerična analiza;
DOI: 10.1016/j.enganabound.2008.08.013
ID: 1006254