time dependent BC with fully developed velocity profile
I am trying to simulate a pulsatile flow through a blood vessel. For doing this I created a profile file (*.prof) to generate a pulse required and applied this as a velocity-BC at the inlet. But this BC is a constant spatially.
For my purpose we would need a velocity pulse which is also fully developed. In other words, The how to apply a BC which varies both with respect to time and with respect to space. Thanks. |
What a nice problem.
You can do this quite easily using a user defined function (UDF). This means you will have to write a very short .c file and then compile it from FLUENT. After that you can use it as a boundary condition. It is quite possible to multiply a fully developed parabolic profile with a time dependent sine. Or whatever you want really. Have a look at: http://www.hipecc.wichita.edu/pdfs/fludf.pdf |
And then check the DEFINE_PROFILE for a velocity profile. If I remember correctly the function CURRENT_TIME should give the physical time you will need.
Good luck! |
Thanks,
The problem I am facing is that inlet in my model is not circular it is an irregular shape since this is blood vessel problem. |
I'm afraid I can't help you there. Fluent can use an experimentally determined inflow profile, but I don't think this can be time dependent. There must be some smart way to do this, hopefully somebody else knows how?
Good luck! |
Thanks
Thanks Jack. I will try to figure it out. Will post If i find out.
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Hi susheil,
I am working on a pulsatile flow through aorta. Have you solved how to input experimentally determined inflow profile which is time dependent? |
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