Learning Forum

[Neerav Gupta]

Hi.
I am doing a transient, turbulent flow analysis where I have an inlet of about 5mm diameter and the cylinder length is about 44mm. Then the flow enters a region with square cross-section of 100x100mm^2. This is the picture of geometry.

Flow is from left to right. The inlet condition is 0.001225 kg/s and the outlet is pressure outlet with 0 gauge pressure.

Now, I ran this calculation with 0.001s time step and the residual plots is like this.

But still when I checked the pressure at all the side walls of the big square cross section , it was still zero. The flo wis not even reaching there. I don't know why it is happening.

I have given the velocity contour in the middle plane. The flow is entering the big region still not spreading properly but it should. Please somebody tell me what is happening here...

 

 

[SRP]

Hi,

It appears that velocity is very low and it take time to reach wall. Can you try to run simulation for more time?

Can you please share more details on the setting that you have used for the turbulence model?

Also can you try to plot the velocity vectors to understand how the velocity is going forward?

Thank you.

[Neerav Gupta]

I will try these things.