[hussein93]

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

[colinda1]

Hi Hussein,

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

Best regards,
Colinda

[hussein93]

Originally Posted by colinda1

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

[hussein93]

problem has already solved