Inlet Boundary Conditions For Turbulence Mixed Up

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markinca
Posts: 56
Joined: Sun Apr 30, 2023 2:41 pm

Inlet Boundary Conditions For Turbulence Mixed Up

Post by markinca »

Under boundary conditions panel for the Inlet velocity, one can enter turbulence and there are two choices but they don't seem to match the input boxes:

"Kinetic Energy & Specific Dissipation Rate" - I would have expected inputs for k & omega but it has an input for epsilon

"Intensity & Length Scale" - I would have expected inputs for Intensity and Turbulence Length but instead it shows inputs for Intensity and omega

There appears to be a mixup on these inputs.

Code: Select all

OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.2.29603 (Git)
Build type: Release
Branch: releases/FreeCAD-0-20
Hash: 930dd9a76203a3260b1e6256c70c1c3cad8c5cb8
Python 3.8.10, Qt 5.15.2, Coin 4.0.1, Vtk 8.2.0, OCC 7.6.3
Locale: English/United States (en_US)
Installed mods: 
  * CfdOF 1.22.7
  * Help 1.0.3
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oliveroxtoby
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Location: South Africa

Re: Inlet Boundary Conditions For Turbulence Mixed Up

Post by oliveroxtoby »

markinca wrote: Wed May 17, 2023 11:12 pm There appears to be a mixup on these inputs.
Yup, sorry...did some rearranging recently and I appear to have jumbled a few things up. Should be sorted.
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markinca
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Re: Inlet Boundary Conditions For Turbulence Mixed Up

Post by markinca »

Thanks!
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markinca
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Re: Inlet Boundary Conditions For Turbulence Mixed Up

Post by markinca »

One follow up on this.

You use the units for Omega as deg/sec but I am used to seeing it as just 1/sec. Any reason for this? It appears there is no conversion to the openfoam inputs so it would seem to be the same but just labeled differently.
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oliveroxtoby
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Re: Inlet Boundary Conditions For Turbulence Mixed Up

Post by oliveroxtoby »

markinca wrote: Thu May 18, 2023 9:24 pm You use the units for Omega as deg/sec but I am used to seeing it as just 1/sec. Any reason for this? It appears there is no conversion to the openfoam inputs so it would seem to be the same but just labeled differently.
Oh dear...thanks for reporting! Should be fixed now.
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