Showing Flow separation in post processing

lami_nar · April 19, 2020, 06:23

I would like to know about any option in Fluent with which i can get the boundary layer separation point for flow over an aerofoil.
Using just the velocity plot is very crude and does not show the exact position of boundary layer separation.

vinerm · April 20, 2020, 04:22

The separation is defined by the point at which the velocity changes its direction. Hence, you are looking for a point where the first-order gradient is 0, implying, the location of 0 shear stress. Plot the wall shear stress over the airfoil and look for the point where the value is 0.

April 19, 2020, 06:23	Showing Flow separation in post processing	#1
lami_nar New Member Rosha Join Date: Apr 2020 Posts: 5 Rep Power: 6	I would like to know about any option in Fluent with which i can get the boundary layer separation point for flow over an aerofoil. Using just the velocity plot is very crude and does not show the exact position of boundary layer separation.

April 20, 2020, 04:22	Flow Separation	#2
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 35	The separation is defined by the point at which the velocity changes its direction. Hence, you are looking for a point where the first-order gradient is 0, implying, the location of 0 shear stress. Plot the wall shear stress over the airfoil and look for the point where the value is 0. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

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