Abstract
The assessment of turbulence models including a second-moment closure and the standard k-ε model has been performed for calculating a turbulent separated flow over a surface mounted obstacle. The results indicate more complex characteristics in this problem compared to backward facing step flow which is often used as the test case of turbulence models. Although the required computational effort is much higher than that of the k-ε model, the superior performance of the second-moment closure model is evident in representing the velocity field immediately above the obstacle as well as the pressure variation along the channel. It is indicated that the shortcomings of the k-ε model are attributable to the erroneous behaviour of the production rate of turbulent kinetic energy as calculated according to the eddy viscosity assumption.
| Original language | English |
|---|---|
| Pages (from-to) | 3305-3310 |
| Number of pages | 6 |
| Journal | Transactions of the Japan Society of Mechanical Engineers Series B |
| Volume | 58 |
| Issue number | 555 |
| DOIs | |
| Publication status | Published - 1992 |
| Externally published | Yes |
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Keywords
- Computational Fluid Dynamics
- Finite-Volume Method. Turbulence Model
- Second-Moment Closure
- Separation
- Turbulent Flow
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering
Cite this
Numerical Study on the Turbulent Flow around a Two-Dimensional Square-Sectioned Obstacle. / Obi, Shinnosuke; Perlc, Milovan; Scheuerer, Georg.
In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 58, No. 555, 1992, p. 3305-3310.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Numerical Study on the Turbulent Flow around a Two-Dimensional Square-Sectioned Obstacle
AU - Obi, Shinnosuke
AU - Perlc, Milovan
AU - Scheuerer, Georg
PY - 1992
Y1 - 1992
N2 - The assessment of turbulence models including a second-moment closure and the standard k-ε model has been performed for calculating a turbulent separated flow over a surface mounted obstacle. The results indicate more complex characteristics in this problem compared to backward facing step flow which is often used as the test case of turbulence models. Although the required computational effort is much higher than that of the k-ε model, the superior performance of the second-moment closure model is evident in representing the velocity field immediately above the obstacle as well as the pressure variation along the channel. It is indicated that the shortcomings of the k-ε model are attributable to the erroneous behaviour of the production rate of turbulent kinetic energy as calculated according to the eddy viscosity assumption.
AB - The assessment of turbulence models including a second-moment closure and the standard k-ε model has been performed for calculating a turbulent separated flow over a surface mounted obstacle. The results indicate more complex characteristics in this problem compared to backward facing step flow which is often used as the test case of turbulence models. Although the required computational effort is much higher than that of the k-ε model, the superior performance of the second-moment closure model is evident in representing the velocity field immediately above the obstacle as well as the pressure variation along the channel. It is indicated that the shortcomings of the k-ε model are attributable to the erroneous behaviour of the production rate of turbulent kinetic energy as calculated according to the eddy viscosity assumption.
KW - Computational Fluid Dynamics
KW - Finite-Volume Method. Turbulence Model
KW - Second-Moment Closure
KW - Separation
KW - Turbulent Flow
UR - http://www.scopus.com/inward/record.url?scp=85007662064&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85007662064&partnerID=8YFLogxK
U2 - 10.1299/kikaib.58.3305
DO - 10.1299/kikaib.58.3305
M3 - Article
AN - SCOPUS:85007662064
VL - 58
SP - 3305
EP - 3310
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 555
ER -