How to find the separation point in fluent

caohan · April 8, 2010, 10:54

Hi all
I am a newbie for using fluent, now I am doing a 2D airfoil simulation. Now,as the separation happen,I need to determine the position of separation point. some people said by using wall shear stress can calculate that point, is that right, can somebody explains for me more specificly.

Thanks for all
Han

jack1980 · April 8, 2010, 14:30

One possibility is to look where the wall shear stress is zero.

Plot -> XY Plot
Select: Wall Fluxes ...
Select: Wall Shear Stress
Under Surfaces: select your airfoil

This will generate a xy-plot, in which the y=0 indicates separation. It works for a 2D case (for a 3D it is also possible, not with xy-plot but with a contour plot of Wall Shear Stress).

caohan · April 8, 2010, 14:43

Hi Jack1980
Thank you for your reply, a very clear explanation for me.

jack1980 · April 8, 2010, 14:48

You're welcome, good luck with your simulation!

April 8, 2010, 10:54	How to find the separation point in fluent	#1
caohan Member tom Join Date: Feb 2010 Posts: 46 Rep Power: 16	Hi all I am a newbie for using fluent, now I am doing a 2D airfoil simulation. Now,as the separation happen,I need to determine the position of separation point. some people said by using wall shear stress can calculate that point, is that right, can somebody explains for me more specificly. Thanks for all Han

April 8, 2010, 14:30		#2
jack1980 Senior Member Jouke de Baar Join Date: Oct 2009 Posts: 127 Rep Power: 17	One possibility is to look where the wall shear stress is zero. Plot -> XY Plot Select: Wall Fluxes ... Select: Wall Shear Stress Under Surfaces: select your airfoil This will generate a xy-plot, in which the y=0 indicates separation. It works for a 2D case (for a 3D it is also possible, not with xy-plot but with a contour plot of Wall Shear Stress). mm.abdollahzadeh likes this.

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April 8, 2010, 14:43	Hi	#3
caohan Member tom Join Date: Feb 2010 Posts: 46 Rep Power: 16	Hi Jack1980 Thank you for your reply, a very clear explanation for me.

April 8, 2010, 14:48		#4
jack1980 Senior Member Jouke de Baar Join Date: Oct 2009 Posts: 127 Rep Power: 17	You're welcome, good luck with your simulation!