Autodesk Simulation CFD

[#1]

I would like to ask for help for simulating the pressure drop for our product ball joint. The inlet pressure will be 10 bar, the incompressible fluid will be water. I would like to know what will be the output pressure or the pressure drop and how to set it up properly. Thank you in advance.

[#2 · Accepted solution]

Hi,

You have a few options:

1. Apply a flow rate at the outlet and a 10 bar at the inlet, CFD will give you the outlet pressure
2. Apply a flow rate at the inlet and a p=0 at the oulet, CFD will give you the dP again - this is the standard approach
3. Apply 10 bar at the inlet and 0 at the outlet and CFD will predict the flow rate - this will take longer than the other options and you will need to run Advection Scheme 5 (this might actually be useful for all options, check out Advection in the help)

[#3]

Dear Sir Jon,

I really appreciate your help, but I have another question why the area of inlet and outlet is changing?

I've used the option 1. Pls. find the attached file.

Thank you very much in advance.

Bjorn Fejer

[#4]

Hi Bjorn,

For the opposite end, did you rotate the cut-plane so that it was in-line with the axis? 

[#5]

Hi Sir John,

Yes it was normal to it. But why is area changing? What is the cause of that? Thank you very much.

I will attached the fusion file, and it will be highly appreciated if you will have a try simulating.

Parameters is as follow:

Inlet Pressure: 10 Bar

Outlet velocity: 6 m/s

Thank you very much in advance.

Bjorn Fejer

[#6 · Accepted solution]

Hi Bjorn,

The area could be a function of your mesh quality.  If you add more mesh to your analysis does that improve the correlation of your area between the 2 models?

-Royce

[#7]

Hi Royce,

Thank you very much for the solution.

Bjorn Fejer