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Paper Information

Journal:   JOURNAL OF APPLIED FLUID MECHANICS (JAFM)   2016 , Volume 9 , Number 6; Page(s) 2685 To 2693.
 
Paper: 

EVALUATION STUDY OF PRESSURE-STRAIN CORRELATION MODELS IN COMPRESSIBLE FLOW

 
 
Author(s):  HANAFI A.*, KHLIFI H.
 
* DEPARTEMENT DE PHYSIQUE, FACULTE DES SCIENCES DE TUNIS, CAMPUS UNIVERSITAIRE EL MANAR 1060, TUNIS, TUNISIA
 
Abstract: 

This paper is devoted to the second-order closure for compressible turbulent flows with special attention paid to modeling the pressure-strain correlation appearing in the Reynolds stress equation. This term appears as the main one responsible for the changes of the turbulence structures that arise from structural compressibility effects. The structure of the gradient Mach number is similar to that of turbulence, therefore this parameter may be appropriate to study the changes in turbulence structures that arise from structural compressibility effects. Thus, the incompressible model (LRR) of the pressure-strain correlation and its corrected form by using the turbulent Mach number, fail to correctly evaluate the compressibility effects at high shear flow. An extension of the widely used incompressible model (LRR) on compressible homogeneous shear flow is the major aim of the present work. From this extension the standard coefficients Ci became a function of the compressibility parameters (the turbulent Mach number and the gradient Mach number). Application of the model on compressible homogeneous shear flow by considering various initial conditions shows reasonable agreement with the DNS results of Sarkar. The ability of the models to predict the equilibrium states for the flow in cases A1 and A4 from DNS results of Sarkar is examined, the results appear to be very encouraging.
Thus, both parameters Mt and Mg should be used to model significant structural compressibility effects at high-speed shear flow.

 
Keyword(s): COMPRESSIBLE, TURBULENCE, PRESSURE-STRAIN, MODEL OF TURBULENCE, SHEAR FLOW
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

HANAFI, A., & KHLIFI, H. (2016). EVALUATION STUDY OF PRESSURE-STRAIN CORRELATION MODELS IN COMPRESSIBLE FLOW. JOURNAL OF APPLIED FLUID MECHANICS (JAFM), 9(6), 2685-2693. https://www.sid.ir/en/journal/ViewPaper.aspx?id=573312



Vancouver: Copy

HANAFI A., KHLIFI H.. EVALUATION STUDY OF PRESSURE-STRAIN CORRELATION MODELS IN COMPRESSIBLE FLOW. JOURNAL OF APPLIED FLUID MECHANICS (JAFM). 2016 [cited 2021July25];9(6):2685-2693. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=573312



IEEE: Copy

HANAFI, A., KHLIFI, H., 2016. EVALUATION STUDY OF PRESSURE-STRAIN CORRELATION MODELS IN COMPRESSIBLE FLOW. JOURNAL OF APPLIED FLUID MECHANICS (JAFM), [online] 9(6), pp.2685-2693. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=573312.



 
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