Negative Stream Function Values - How do I get the

March 13, 2002, 11:17

I am currently simulating stokes flow (Re = 0) in a single lid driven cavity. It is a 1m by 1m cavity where the driving wall translates at 1m/s.

As one would expect I find a main central eddy and two eddies in the corners opposite the moving wall. However these are counter-rotating and so should have a diiferent sign to the main eddy. I can only find positive values.

Does anyone have any suggestions on why I don't see these changes of sign?

There are many journal articles which back me up that these corner eddies should be negative.

Comments and suggestions would be greatfully recieved.

March 13, 2002, 20:10

It's dependent of the location of reference value(psi=0). Even though the value of small eddy is positive, I am sure that it is relatively negative compared to the value of dividing line(boundary of central eddy and corner eddy).

Sincerely, Jinwook

March 13, 2002, 11:17	Negative Stream Function Values - How do I get the	#1
Chris Marriner Guest Posts: n/a	I am currently simulating stokes flow (Re = 0) in a single lid driven cavity. It is a 1m by 1m cavity where the driving wall translates at 1m/s. As one would expect I find a main central eddy and two eddies in the corners opposite the moving wall. However these are counter-rotating and so should have a diiferent sign to the main eddy. I can only find positive values. Does anyone have any suggestions on why I don't see these changes of sign? There are many journal articles which back me up that these corner eddies should be negative. Comments and suggestions would be greatfully recieved.

March 13, 2002, 20:10	Re: Negative Stream Function Values - How do I get	#2
Jin-Wook LEE Guest Posts: n/a	It's dependent of the location of reference value(psi=0). Even though the value of small eddy is positive, I am sure that it is relatively negative compared to the value of dividing line(boundary of central eddy and corner eddy). Sincerely, Jinwook

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