Question

In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

a.

μ , α and θ all have units of m/s.

b.

μ , α and θ all have units of m²/s.

c.

α and θ have units of m²/s, while μ has unit of m/s.

d.

α and θ have units of m/s, while μ has unit of m²/s.

Answer: (c).α and θ have units of m²/s, while μ has unit of m/s.

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Q. In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

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