Friday, 22 September 2017

thermodynamics - Knudsen Number and pressure


When computing the Knudsen number to know if the continuum hypothesis can be applied as $\frac{k_B T}{p \sqrt{2} \pi d^2 L}$, do we use the static or total pressure of the free stream? My object is travelling at 7.6 km/s and I don't know if I should include it




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