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Vecolity flux units in different files

Posted: Wed May 22, 2024 8:39 am

by lina12138

Hello,

When I used svFSI to do a simple cylindrical model simulation, I input a steady flow (in mm/s) into the inlet (Area = 12.49mm^2), as shown below. But the flux in the result file B_NS_Velocity_flux is about 7.75. I am not sure what is the unit of flow here.

Code: Select all

   Add BC: inlet {
      Type: Dir
      Time dependence: Steady
      Value: 1.249689
      Profile: Parabolic
   }

: B_NS_Velocity_flux.PNG (13.87 KiB) Viewed 20476 times

Any help will be appreciated.
Lina

Re: Vecolity flux units in different files

Posted: Wed May 22, 2024 10:13 am

by davep

Hi Lina,

The svFSI solver has no implicit units although some default values (e.g. density) use CGS. You just need to make sure that your mesh units are consistent with your parameter units. Note that you can scale your mesh to match your parameter units using the Mesh scale factor parameter.

Cheers,
Dave