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Eddy viscosity is a turbulent transfer of_________ (a)Fluid

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Eddy viscosity is a turbulent transfer of_________

(a) Fluid

(b) Heat

(c) Momentum

(d) Pressure

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This interesting question is from Separation of Boundary Layer topic in division Boundary Layer Flow & Forces on Sub-merged Bodies of Fluid Mechanics

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The correct option is (c) Momentum

The explanation: Eddy viscosity is a turbulent transfer of momentum by eddies. It gives rise to an internal fluid friction. It is in analogous to the action of molecular viscosity in laminar fluid flow. Eddy viscosity takes place on a large scale.

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