quires on turbulent viscosity
i am new to this field of CFD. i have some small quires. 1. can we express the turbulent viscosity for 3D flow using prandtls mixing length model? if so how can it be expressed? 2. in ke model for turbulence, if k is a function of x,y,z,t and similarly for e, dont u think it there should be 3 equations each for k and e, for complete mathematical closure of the model.?

Re: quires on turbulent viscosity
(1). I think there is a popular algebraic turbulence model called "BaldwinLomax model", you can take a look at it. (2). If it is a function of x,y,z,t, then it is four dimensional. The variable is a function (x,y,z,t), and the equation will have derivative terms such as dkdx, dkdy, dkdz, and dkdt,etc.... (3). K and epsilon are not vectors, so each requires only one equation.

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