Rigorous Modeling of Dissipation-Rate Equation Using Direct Simulations
スポンサーリンク
概要
- 論文の詳細を見る
With the aid of direct numerical simulation (DNS) data, we have constructed near-wall modeling of the dissipation-rate equation for a k-ε turbulence model. All the budget terms in the exact ε-equation are incorporated in the modeled ε-equation, and both term-to-term and overall comparisons of model predictions with the DNS data are performed. It is found that the wall region should be partitioned into at least two regions so as to reflect different mechanisms of the generation processes in the dissipation of turbulent kinetic energy. Pressure diffusions in the k-and ε-equations are found to be equally important and thus should be modeled. Comparisons of the resultant k-ε model with the DNS data of channel and boundary layer flows with and without pressure gradients show close agreement of various turbulent quantities. In particular, near-wall behavior of ε is reproduced with the present model very well.
- 一般社団法人日本機械学会の論文
- 1995-02-15
著者
-
Shimada Masaya
Department Of Mechanical Engineering Nagoya Institute Of Technology
-
NAGANO Yasutaka
Department of Mechanical Engineering, Nagoya Institute of Technology
-
Nagano Y
Nagoya Inst. Technol. Nagoya Jpn
-
Nagano Yasutaka
Department Of Environmental Technology And Urban Planning Graduate School Of Engineering Nagoya Inst
関連論文
- Mechanism of Counter Gradient Flux in Homogeneous Shear Turbulence
- Rigorous Modeling of Dissipation-Rate Equation Using Direct Simulations
- TED-AJ03-300 AERODYNAMIC SOUND GENERATED BY INTERACTION BETWEEN VORTICES AND A BODY
- C302 RETRANSITION FROM TURBULENCE TO LAMINAR FLOW IN A COMBINED-CONVECTION BOUNDARY LAYER ALONG A VERTICAL HEATED PLATE(Mixed convection)
- TED-AJ03-540 MIXED CONVECTION IN THE THERMAL ENTRANCE REGION OF UPWARD OR DOWNWARD AIR-FLOW BETWEEN INCLINED PARALLEL PLATES WITH UNIFORM WALL TEMPERATURE
- C305 BEHAVIOR OF MIXED CONVECTION NEAR THE BEGINNING POINT OF HEAT TRANSFER SECTION BETWEEN INCLINED PARALLEL PLATES WITH UPWARD OR DOWNWARD AIR-FLOWS(Mixed convection)
- RNG Modeling of Turbulent Heat Flux and Its Application to Wall Shear Flows
- TED-AJ03-147 EFFECTS OF ADVERSE PRESSURE GRADIENT ON MEAN AND FLUCTUATING TEMPERATURES IN TURBULENT BOUNDARY LAYER
- F210 PREDICTION OF TURBULENT FLOW OVER A CURVED HILL(Turbulence modeling)
- Heat Transfer Mechanism in Turbulent Thermal Boundary Layer Subjected to Adverse Pressure Gradient
- TURBULENCE MODEL FOR PREDICTING HEAT TRANSFER IN IMPINGING JET(Impinging Jet)
- Calculation of Turbulent Flows with Pressure Gradients Using a k-ε Model
- Effects of Prandtl Number on Turbulent Heat Transfer in Curved Wall Shear Flows
- Renormalization group theory for turbulence : Assessment of the Yakhot-Orszag-Smith theory