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The mixing length model defines the turbulence dynamic viscosity as a function of ____________

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The mixing length model defines the turbulence dynamic viscosity as a function of ____________

(a) position

(b) mean flow properties

(c) fluctuating components

(d) velocities

This question was addressed to me in exam.

This interesting question is from Mixing Length Turbulence Model in portion Turbulence Modelling of Computational Fluid Dynamics

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Correct answer is (a) position

Easy explanation: The mixing length model is a variation of the RANS model. It does not need any additional transport equations. It describes the stresses in terms of a simple algebraic formula for the turbulent dynamic viscosity as a function of position.

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