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-   -   plotting wall shear stress (http://www.cfd-online.com/Forums/fluent/29593-plotting-wall-shear-stress.html)

Ellen April 5, 2002 17:23

plotting wall shear stress
 
Hi, all:

After calculating an air flow field, I tried to display the wall shear stress along a wall. The vector display showed clearly that there's a region of negative wall shear (where the flow recirculation occured), but the xy-plot of wall shear showed me all non-negative values. Could anyone tell me why this happened? Is it because that Fluent only gives the magnitude when doing xy plot?

Thanks a lot.

Ellen

alhap April 5, 2002 21:50

same model,different result!!!why?
 
Hello,everybody.Now I am solving flowfield around airfoil NACA0012,which has attack angle of 4degrees and a Ma number of 0.8.For the first time,I use a C-type grid,the second time,a hydrid one with a rectangular farfield boundery(C-tyep around the airfoil,and triangular ). But the second Cd doubled the first one, whereas there is a little difference between Cl and Cm. Can anybody tell me why?


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