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unsteady Boundary Condition ( user defined function) |
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#1 |
New Member
Join Date: Apr 2022
Posts: 10
Rep Power: 4 ![]() |
Hey Guys,
I want to simulate a fluctuating flow, that flow through the Turbine ( just NGV). A sine function can describe the fluctuating pressure in the inlet good. So I want to use a unsteady Boundary condition at the inlet that change with time. But I find nowher the option to use a user defined function. I just can click at the absolute total pressure, change the parameter from constant to function and upload a graph. The sine function has the simple form: p = Amplitude*sine*(2*pi*frequence*time). greetings Hussein |
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#2 |
Senior Member
Colinda
Join Date: May 2012
Location: Brussels
Posts: 153
Rep Power: 14 ![]() |
Hi Hussein,
Which environment are you using? Omnis or Fine? Which version? Best regards, Colinda |
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#3 | |
New Member
Join Date: Apr 2022
Posts: 10
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Quote:
Hi Colinda, iam using Omnis 5.2, the problem has solved. I Found the feature thx. There is another issue, in the manual/Omnis Environment/ Profil manager/Standard CSV Format/ the theta, that is defined there, is it the azimuthal angle ? And since I have a fluctuating flow I have a variation in the velocity angle within a range of ±40 degree. Where can I define these angle ? Because for example in the Inlet/subsonic/cylindrical/total quantities imposed/angle from axial direction or relative angle from axial direction and more, maybe I can define the velocity angle here ? I have attached a picture, there is alpha ( velocity angle) applied over the azimuthal angle. greetings Hussein |
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#4 |
New Member
Join Date: Apr 2022
Posts: 10
Rep Power: 4 ![]() |
problem has already solved
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