question about streamwise direction in the porosity
Hi, everyone!
I have encountered a question when I set the streamwise direction in the porosity domain. The porosity domain is of revolution, and consquently the streamwise direction varies with theta, which is shown in the pic. However, the option in setting porosity just provides a unquine direction, which can't vary with theta. Is anyone helping me? :) http://ww1.sinaimg.cn/bmiddle/65a92d...20v30ffn0a.jpg |
You can specify the direction in cylindrical coordinates rather than Cartesian. Looks like that would work for your case.
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I just specified the direction in cylindrical coordinates. what confused me is the option only set one direction. When theta=0 degree, the direction is 45 degree and in cylindrical coordinates r=1, z=1, which is shown in the left of the pic. When theta=180 degree, the direction is 135 degree and in cylindrical coordinates r=1, z=1. In the option , the theta is just a value, and I can't let it equal from 0 to 360. What shall I do? http://ww4.sinaimg.cn/bmiddle/65a92d...20g105hq3f.jpg |
Why do you insist on using a thicker porous model? Why not use the porous interface? Since the flow is normal to the inlet surface of your porous zone and proceeds (relatively) normally, interface makes sense.
You can deduce the pressure drop as a function of dot product of local surface normal of inlet surface and the local velocity. OJ |
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