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October 19, 2018, 00:59 |
Inlet Boundary Mass Flow Error
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#1 |
Senior Member
M
Join Date: Dec 2017
Posts: 645
Rep Power: 12 |
Hi all,
I've come across a strange issue. I am basically simulating water flow into a tank. The inlet is a horizontal rectangular patch. The flow direction should be applied with 45 deg inclination. So I used Cart. Vel. Components to apply it. The total inlet velocity is known from case mass flow and inlet patch area. To have it applied with 45 deg, I apply it multiplied with 1/sqrt(2) in both my desired directions. Problem is: mass flow in result and monitor is only 1/sqrt(2) times the amount we were going for. The direction however seems to be 45 deg as we wanted. I looked it up in the modeling guide, where it is stated, that the normal-to-boundary component of the input is ignored. I must be missing something here, but I dont get a) why it is implemented like that and b) how to get my desired mass flow at the inlet. Any help is very appreciated. |
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