OpenFOAM for DG (discontinuity Galerkin) Method

q86091483 · August 17, 2015, 02:10

Dear all OpenFOAMers:
This is my first time to have a public thread in CFDonline.

It is known that most of the finite volume CFD with unstructured mesh, including OpenFOAM, possess 2-th order accuracy in space. However, for some applications, such as LES for turbulence combustion and acoustic instability, high order algorithm on unstructured mesh is needed.

So far, there're several in-house codes that use 3-th or 4-th DG (discontinuity method) to achieve higher space accuracy. These codes include AVBP (http://www.cerfacs.fr/4-26334-The-AVBP-code.php) and some other papers also shows that it's possible to implement high order DG method on unstructured mesh.

My questions:
1. Is it possible to implement DG-like method in OpenFOAM.
2. Whether the current system, ( I mean: interpolation->matrix solver) fits for the DG
method?

I've been searching for this topic but it seems that there' little material on the internet. Looking forward for your opinion !

ltaddei · September 12, 2022, 08:00

Hi,

Have a look at HopeFOAM :

https://github.com/HopeFOAM/HopeFOAM

It provides DG formulation for OpenFOAM.

Best,

August 17, 2015, 02:10	OpenFOAM with high order accuracy	#1
q86091483 New Member Zisen Li Join Date: Oct 2014 Posts: 1 Rep Power: 0	Dear all OpenFOAMers: This is my first time to have a public thread in CFDonline. It is known that most of the finite volume CFD with unstructured mesh, including OpenFOAM, possess 2-th order accuracy in space. However, for some applications, such as LES for turbulence combustion and acoustic instability, high order algorithm on unstructured mesh is needed. So far, there're several in-house codes that use 3-th or 4-th DG (discontinuity method) to achieve higher space accuracy. These codes include AVBP (http://www.cerfacs.fr/4-26334-The-AVBP-code.php) and some other papers also shows that it's possible to implement high order DG method on unstructured mesh. My questions: 1. Is it possible to implement DG-like method in OpenFOAM. 2. Whether the current system, ( I mean: interpolation->matrix solver) fits for the DG method? I've been searching for this topic but it seems that there' little material on the internet. Looking forward for your opinion ! parthigcar likes this. Last edited by q86091483; August 17, 2015 at 05:35.

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September 12, 2022, 08:00		#2
ltaddei New Member Join Date: Sep 2020 Posts: 2 Rep Power: 0	Hi, Have a look at HopeFOAM : https://github.com/HopeFOAM/HopeFOAM It provides DG formulation for OpenFOAM. Best,