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Active Member
bjorn_fejer
Posts: 6
Registered: ‎02-04-2013
Accepted Solution

Pressure Drop Calculation

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02-04-2013 10:56 PM

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.

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Product Support
wildej
Posts: 701
Registered: ‎08-25-2011

Re: Pressure Drop Calculation

02-06-2013 10:44 AM in reply to: bjorn_fejer

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)


Jon Wilde
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Active Member
bjorn_fejer
Posts: 6
Registered: ‎02-04-2013

Re: Pressure Drop Calculation

02-08-2013 12:07 AM in reply to: wildej

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

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Product Support
wildej
Posts: 701
Registered: ‎08-25-2011

Re: Pressure Drop Calculation

02-08-2013 06:49 AM in reply to: bjorn_fejer

Hi Bjorn,

 

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



Jon Wilde
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Active Member
bjorn_fejer
Posts: 6
Registered: ‎02-04-2013

Re: Pressure Drop Calculation

02-09-2013 02:55 AM in reply to: wildej

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

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Product Support
Royce_adsk
Posts: 551
Registered: ‎08-24-2011

Re: Pressure Drop Calculation

02-11-2013 01:49 PM in reply to: bjorn_fejer

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



Royce Abel
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Active Member
bjorn_fejer
Posts: 6
Registered: ‎02-04-2013

Re: Pressure Drop Calculation

02-11-2013 10:35 PM in reply to: Royce_adsk

Hi Royce,

 

Thank you very much for the solution.

 

Bjorn Fejer

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