1.

The formula to find ω from the k-value obtained using the turbulence intensity is ____________(a) ω=\(\frac{k^{3/2}}{l^2}\)(b) ω=\(\frac{k^{3/2}}{l}\)(c) ω=\(\frac{k^{1/2}}{l^2} \)(d) ω=\(\frac{k^{1/2}}{l}\)I have been asked this question in an international level competition.I want to ask this question from Turbulence Modelling topic in portion Turbulence Modelling of Computational Fluid Dynamics

Answer»

The correct OPTION is (d) ω=\(\frac{k^{1/2}}{l}\)

To explain: The ε and the ω-values should be obtained from k-value in the k-ε and k-ω models. The formulae used to get these values are

ε=\(C_μ\frac{k^{\frac{3}{2}}}{l}\)

ω=\(\frac{k^{\frac{1}{2}}}{l}\)

Where,

l → TURBULENT length scale.

Cμ → A dimensionless constant.


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