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Title:
Vpliv lastnosti mikropolarnih tekočin na prenos toplote pri naravni konvekciji
Authors:
ID
Zadravec, Matej
(
Author
)
ID
Hriberšek, Matjaž
(
Author
)
ID
Škerget, Leopold
(
Author
)
Files:
http://www.drustvozamehaniko.si/zbornik/ZbornikKD2008.pdf
Language:
Slovenian
Work type:
Unknown
Typology:
1.08 - Published Scientific Conference Contribution
Organization:
FS - Faculty of Mechanical Engineering
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
Year of publishing:
2008
PID:
20.500.12556/DKUM-26268
UDC:
536.25
COBISS.SI-ID:
12631574
NUK URN:
URN:SI:UM:DK:GXLT9HTV
Publication date in DKUM:
31.05.2012
Views:
2531
Downloads:
56
Metadata:
Categories:
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Secondary language
Language:
English
Title:
Effect of a micropolar fluids properties on a heat transfer in a natural convection
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.
Keywords:
heat transfer
,
natural convection
,
square cavity
,
micropolar fluid flow
,
numerical results
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