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The value of turbulent viscosity is fairly close to that of __________

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The value of turbulent viscosity is fairly close to that of __________

(a) Turbulent diffusivity

(b) Newton’s viscosity

(c) Kinematic viscosity

(d) Dynamic viscosity

The question was asked by my school teacher while I was bunking the class.

Question is from Turbulent Viscosity in portion Turbulence Modelling of Computational Fluid Dynamics

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Correct option is (a) Turbulent diffusivity

The best I can explain: Transport of momentum is due to viscosity and transport of heat or mass is due to diffusivity. In turbulent flows, both of these are due to the same mechanism which is eddy mixing. So, the value of turbulent viscosity is considered to be close to that of turbulent diffusivity.

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