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Physics of Fluids : Modeling of the subfilter scalar dissipation rate using the concept of optimal estimators

By G. Balarac, H. Pitsch, and V. Raman

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Book Id: WPLBN0002169579
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 5 September 2008

Title: Physics of Fluids : Modeling of the subfilter scalar dissipation rate using the concept of optimal estimators  
Author: G. Balarac, H. Pitsch, and V. Raman
Volume: Issue : September 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Physics of Fluids Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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H. Pitsch, And V. Rama, G. B. (n.d.). Physics of Fluids : Modeling of the subfilter scalar dissipation rate using the concept of optimal estimators. Retrieved from http://worldjournals.org/


Description
Description: In this work, modeling of the subfilter scalar dissipation rate is addressed. First, the best set of quantities to write a model is determined using the concept of optimal estimators. This study shows that the best approach is to assume a proportionality between the turbulent time scale and turbulent scalar mixing time scale. It is shown that the turbulent time scale should be defined by the subfilter kinetic energy. To define the coefficient appearing in this model, a dynamic determination based on a global subfilter equilibrium assumption between the dissipation and the production terms leads to the best results.

 
 


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