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Abstrakt
The inﬂuence of diﬀerent turbulence models used in computational ﬂuid dynamics predictions is studied in connection with room air movement. The turbulence models used are the high Renumber k–e model and the high Re number Reynolds stress model (RSM). The threedimensional wall jet is selected for the work. The growth rate parallel to the wall in a threedimensional wall jet is large compared with the growth rate perpendicular to the wall, and it is large compared with the growth rate in a free circular jet. It is shown that it is not possible to predict the high growth rate parallel with a surface in a three dimensional wall jet by the k–e turbulence model. Furthermore, it is shown that the growth rate can be predicted to a certain extent by the RSM with wall reﬂection terms. The ﬂow in a deep room can be strongly inﬂuenced by details as the growth rate of a threedimensional wall jet. Predictions by a k–e model and RSM show large deviations in the occupied zone. Measurements and observations of streamline patterns in model experiments indicate that a rea sonable solution is obtained by the RSM compared with the solution obtained by the k–e model.
Originalsprog  Engelsk 

Tidsskrift  Indoor Air 
Vol/bind  14 
Udgave nummer  3 
Sider (fratil)  159168 
ISSN  09056947 
Status  Udgivet  jun. 2004 
Emneord
 Computational Fluid Dynamics
 Turbulence Models
 k–e Model
 Reynolds Stress Model
 Room Air Distribution
 ThreeDimensional Wall Jet
 Growth Rate in Jet
Fingeraftryk
Dyk ned i forskningsemnerne om 'Impact of turbulence anisotropy near walls in room airflow'. Sammen danner de et unikt fingeraftryk.Projekter
 1 Igangværende

Numerisk beregning af luftfordeling i rum/
Nielsen, P. V., Brohus, H., Heiselberg, P. & Li, Z.
19/05/2010 → …
Projekter: Projekt › Forskning