Hi,

I want to vary the pressure from 0-5 bar at the inlet by the time interval of 0-5 sec. How this can be possible ?

Yes it is possible. If you have a function with respect to time, you can use the Expressions tab for this purpose.

Can u pls tell me the expression.I badly in need of it.

Create a 1D function in Pre, say you call it myPressure. Enter coordinate units of [s] ) and result units of [Pa]. Enter coordinates and results for 0 [s], 0 [Pa] and 5 [s], 5 [Pa]. Turn on extend min and extend max. To use the function, enter the following expression in your boundary condition for pressure:

myPressure(t)

That's it.

Regards, Robin

Hi Robin,

Thanks a lot,I am not able to understand clearly Can u pls give it in expression format. That would be helpful to do my project successfully

I want to vary the pressure from 0-5 bar during the time intervel of 0-10 sec at inlet.

For every 2s the pressure should be varied.

Can u give it in expression format pls.

Read the doc on 1D profiles. It should be fairly obvious how to do this.