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

Abstract

V prispevku so predstavljeni numerični rezultati analize vpliva spremenljivih tokovnih razmer na prenos toplote v primeru naravne konvekcije mikropolarnih tekočin v kvadratni kotanji. Za potrebe numeričnega reševanja problema je bila razvita hitrostno-vrtinčna formulacijo Navier Stokesovih enačb z vpeljano teorijo mikropolarnih tekočin. Izveden je bil testni primer naravne konvekcijev kvadratni kotanji za različne vrednosti Rayleighovih števil vse do vrednosti ▫${10}^7$▫. Rezultati so pokazali da mikrorotacija v mikropolarni tekočini zmanjšuje prenos toplote od tople stene v kotanji in jo je tako v primeru tekočin, ki izražajo mikropolarni značaj, pri numeričnih simulacijah potrebno upoštevati.

Keywords

prenos toplote;naravna konvekcija;kvadratna kotanja;mikropolarne tekočine;numerični rezultati;

Data

Language: Slovenian
Year of publishing:
Typology: 1.08 - Published Scientific Conference Contribution
Organization: UM FS - Faculty of Mechanical Engineering
UDC: 536.25
COBISS: 12631574 Link will open in a new window
Views: 1910
Downloads: 33
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Other data

Secondary language: English
Secondary title: Effect of a micropolar fluids properties on a heat transfer in a natural convection
Secondary abstract: The contribution deals with numerical simulation of natural convection in micropolar fluids in a square cavity. The micropolar fluid flow theory is incorporated into the framework of a velocity-vorticity formulation of Navier-Stokes equations. 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 ▫${10}^7$▫. The results show, that microrotation 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.
Secondary keywords: heat transfer;natural convection;square cavity;micropolar fluid flow;numerical results;
URN: URN:SI:UM:
Pages: Str. 229-236
Keywords (UDC): mathematics;natural sciences;naravoslovne vede;matematika;physics;fizika;heat;thermodynamics;statistical physics;termodinamika;toplota;statistična fizika;heat conduction;heat transfer;
ID: 1005743
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