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unsteady Boundary Condition ( user defined function)

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Old   June 1, 2022, 07:28
Default unsteady Boundary Condition ( user defined function)
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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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Old   June 7, 2022, 09:56
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Hi Hussein,

Which environment are you using? Omnis or Fine? Which version?

Best regards,
Colinda
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Old   June 7, 2022, 10:31
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Quote:
Originally Posted by colinda1 View Post
Hi Hussein,

Which environment are you using? Omnis or Fine? Which version?

Best regards,
Colinda

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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Old   June 9, 2022, 05:53
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problem has already solved
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