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The diffusion term in the general transport equation is div(Γgradφ). While equating this with the Navier-Stokes equations, what is Γ?

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The diffusion term in the general transport equation is div(Γgradφ). While equating this with the Navier-Stokes equations, what is Γ?

(a) k

(b) λ

(c) μ

(d) \(\vec{V}\)

I had been asked this question in a job interview.

The origin of the question is Navier Stokes Equation in division Governing Equations of Fluid Dynamics of Computational Fluid Dynamics

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Correct option is (c) μ

Easiest explanation: The diffusion term in the Navier-stokes equations is div(μ gradu) for the x-momentum equation. Comparing this with the general transport equation, Γ is μ- dynamic viscosity coefficient.

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