Linear eddy viscosity models
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This linear relationship is also known as ''the Boussinesq hypothesis''. For a deep discussion on this linear constitutive relationship, check section [[Introduction to turbulence/Reynolds averaged equations]]. | This linear relationship is also known as ''the Boussinesq hypothesis''. For a deep discussion on this linear constitutive relationship, check section [[Introduction to turbulence/Reynolds averaged equations]]. | ||
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Revision as of 17:13, 30 October 2009
These are turbulence models in which the Reynolds stresses are modelled by a linear constitutive relationship with the mean flow straining field, such as:
where is the coefficient termed turbulence "viscosity" (also called the eddy viscosity), and is the mean strain rate defined by:
This linear relationship is also known as the Boussinesq hypothesis. For a deep discussion on this linear constitutive relationship, check section Introduction to turbulence/Reynolds averaged equations.