Calculation of Knudsen number -- CFD Online Discussion Forums

June 28, 2019, 01:16	Calculation of Knudsen number	#1
esha Member Join Date: Aug 2018 Posts: 90 Rep Power: 8	Hi, I want to calculate Knudsen number and I know the formula is kn=mean free path/characteristic length. I want to calculate it for flow over a circular cylinder having slip boundary and Kn is defined by the ratio of slip length to the diameter of the cylinder. I set the slip boundary condition by using fluent. Now I do not know how to calculate the slip length as I am new to CFD. or should I use Knudsen number but how may I give it in fluent? I am confused, can someone kindly explain it. I will highly appreciate. Last edited by esha; June 29, 2019 at 04:24.

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