Author: V. Adumitroaie
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Improved Favre-Reynolds Stress Closures for High Speed Flows
Author: V. Adumitroaie
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Progress in Favre-Reynolds Stress Closures for Compressible Flows
Author: Virgil Adumitroaie
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
Book Description
A closure for the compressible portion of the pressure strain covariance is developed. It is shown that, within the context of a pressure strain closure assumption linear in the Reynolds stresses, an expression for the pressure dilatation can be used to construct a representation for the pressure strain. Additional closures for the unclosed terms in the Favre Reynolds stress equations involving the mean acceleration are also constructed. The closures accommodate compressibility corrections depending on the magnitude of the turbulent Mach number, the mean density gradient, the mean pressure gradient, the mean dilatation, and, of course, the mean velocity gradients. The effects of the compressibility corrections are consistent with current DNS results. Using the compressible pressure strain and mean acceleration closures in the Favre Reynolds stress equations an algebraic closure for the Favre Reynolds stresses is constructed. Noteworthy is the fact that, in the absence of mean velocity gradients, the mean density gradient produces Favre Reynolds stresses in accelerating mean flows. Computations of the mixing layer using the compressible closures developed are described. Favre Reynolds stress closure and two equation algebraic models are compared to laboratory data. The mixing layer configuration computations are compared to laboratory data; since the laboratory data for the turbulence stresses is inconsistent, this comparison is inconclusive. Comparisons for the spread rate reduction indicate a sizable decrease in the mixing layer growth rate.
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
Book Description
A closure for the compressible portion of the pressure strain covariance is developed. It is shown that, within the context of a pressure strain closure assumption linear in the Reynolds stresses, an expression for the pressure dilatation can be used to construct a representation for the pressure strain. Additional closures for the unclosed terms in the Favre Reynolds stress equations involving the mean acceleration are also constructed. The closures accommodate compressibility corrections depending on the magnitude of the turbulent Mach number, the mean density gradient, the mean pressure gradient, the mean dilatation, and, of course, the mean velocity gradients. The effects of the compressibility corrections are consistent with current DNS results. Using the compressible pressure strain and mean acceleration closures in the Favre Reynolds stress equations an algebraic closure for the Favre Reynolds stresses is constructed. Noteworthy is the fact that, in the absence of mean velocity gradients, the mean density gradient produces Favre Reynolds stresses in accelerating mean flows. Computations of the mixing layer using the compressible closures developed are described. Favre Reynolds stress closure and two equation algebraic models are compared to laboratory data. The mixing layer configuration computations are compared to laboratory data; since the laboratory data for the turbulence stresses is inconsistent, this comparison is inconclusive. Comparisons for the spread rate reduction indicate a sizable decrease in the mixing layer growth rate.
Assessment and Application of Reynolds Stress Closure Models to High-speed Compressible Flows
Author: Thomas B. Gatski
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Closure Strategies for Turbulent and Transitional Flows
Author: B. E. Launder
Publisher: Cambridge University Press
ISBN: 0521792088
Category : Mathematics
Languages : en
Pages : 769
Book Description
Publisher Description
Publisher: Cambridge University Press
ISBN: 0521792088
Category : Mathematics
Languages : en
Pages : 769
Book Description
Publisher Description
International Aerospace Abstracts
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1016
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1016
Book Description
NASA Technical Memorandum
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 492
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 492
Book Description
Second Order Closure Model for Turbulent Reacting Flows
Author: Mohammad Farshchi
Publisher:
ISBN:
Category :
Languages : en
Pages : 340
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 340
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1038
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1038
Book Description
Development of a Near-wall Reynolds-stress Closure Based on the SSG Model for the Pressure Strain
Author: R. M. C. So
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
Book Description
Application of a Reynolds Stress Turbulence Model to the Compressible Shear Layer
Author: S. Sarkar
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 36
Book Description
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 36
Book Description