CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

div schemes error using Gauss linear

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   September 6, 2021, 05:12
Exclamation div schemes error using Gauss linear
Horst van Gras
Join Date: Oct 2018
Posts: 45
Rep Power: 7
HorstvanGrass is on a distinguished road
I had already asked a question in a previous post: Negative Enthalpy and wrong temperature

I could restrain my problem of wrong enthalpy and wrong temperature to the convection part of the energy equation in EEqn.h fvm:div(phi,h) in other words \nabla \cdot (\phi\:h).

When using the second order Gauss linear my enthalpy is dropping and the temperature falls under 293K, which is not physical. However when using Gauss upwind the enthalpy remains to it initial state, which is correct and the minimal temperature is still at 293K.
Remark phi is very small in my case and I doubt that the second order linear scheme causes dispersion error and the dissipative upwind smooth the error out.

Is this possible?
HorstvanGrass is offline   Reply With Quote


energy equation, enthalpy, temperature

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Unstructured mesh made out of OF sinatahmooresi OpenFOAM Running, Solving & CFD 7 July 22, 2021 01:59
Fail to converge when solving with a fabricated solution zizhou FLUENT 0 March 22, 2021 06:33
Optimal tolerance and variables scaling settings 4513645ygq Main CFD Forum 0 July 28, 2020 08:56
2nd Order Convergence Problem for 3D Airfoil turkmengokce OpenFOAM Running, Solving & CFD 1 September 10, 2015 07:20
solution diverges when linear upwind interpolation scheme is used subash OpenFOAM 0 May 29, 2010 01:23

All times are GMT -4. The time now is 02:40.