meaning of surface streamlines

Nick R · November 4, 2010, 21:25

Hi,

This may be a trivial question but I'm new to CFD. In CFX post you can plot surface streamlines. Given the fact that velocity is zero on solid walls (hence no streamlines there) what does this option represent?
Also how can you get 2D views(x-y, y-z etc) in CFX post? Clicking on the axes don't work. Should these planes be defined? Thanks.

Nick R

ghorrocks · November 5, 2010, 05:06

Surface streamlines follow the wall shear stress vector.

To create 2D views put in a slice plane. Then you define the plane location and off you go.

Nick R · November 5, 2010, 05:14

Thanks so it represents the shear force on the wall.

ghorrocks · November 5, 2010, 15:17

That's right. If you put an oil drop on the surface it is where the wind will blow it.

November 4, 2010, 21:25	meaning of surface streamlines	#1
Nick R Senior Member Nick Join Date: Nov 2010 Posts: 126 Rep Power: 15	Hi, This may be a trivial question but I'm new to CFD. In CFX post you can plot surface streamlines. Given the fact that velocity is zero on solid walls (hence no streamlines there) what does this option represent? Also how can you get 2D views(x-y, y-z etc) in CFX post? Clicking on the axes don't work. Should these planes be defined? Thanks. Nick R

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November 5, 2010, 05:06		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	Surface streamlines follow the wall shear stress vector. To create 2D views put in a slice plane. Then you define the plane location and off you go.

November 5, 2010, 05:14		#3
Nick R Senior Member Nick Join Date: Nov 2010 Posts: 126 Rep Power: 15	Thanks so it represents the shear force on the wall.

November 5, 2010, 15:17		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	That's right. If you put an oil drop on the surface it is where the wind will blow it.