rhoSimpleFoam vs rhoCentralFoam

harsha_kulkarni · May 13, 2020, 23:10

What is the difference between rhoSimpleFoam and rhoCentralFoam???

HPE · May 14, 2020, 02:03

Hi

- Do you have any pre-investigation or summary of your current findings that you would like to share with us to have a kickstart, if possible.

harsha_kulkarni · May 14, 2020, 02:06

Quote:

Originally Posted by HPE

Hi

- Do you have any pre-investigation or summary of your current findings that you would like to share with us to have a kickstart, if possible.

No, I just have case of compressible flow I am not sure which solver to be used

HPE · May 14, 2020, 02:22

- It should be straightforward to search web to get a preliminary information to isolate your questions, and help others in the forum.
- Hope you find a solution to your problem.

mAlletto · December 1, 2020, 02:57

So just a quick start for those how see this thread:

rhoCentralFoam is a unsteady density based compressible solver.

rhoSimpleFoam is a steady pressure based compressible solver.

A short description of the solver rhoCentralFoam can be found in this thesis which also provided a description of sonicFoam which is a pressure based unsteady solver:

https://www.researchgate.net/profile...teractions.pdf

The original (at least the oldest i could find) paper describing rhoCentralFaom is the following: https://home.cscamm.umd.edu/centpack...9-centpack.pdf

I started a wiki with the description of rhoSimpleFoam. However it is still work in progress:

https://openfoamwiki.net/index.php/RhoSimpleFoam

This book https://www.springer.com/de/book/9783319168739 provides an excellent overview of the numerics in OF and also the derivation of the pressure based compressible solver

dlahaye · December 1, 2020, 07:47

Thank a bundle for sharing the reference of rhoSimpleFoam.

I am happy to support a wiki page on rhoSimpleFoam.

Please let me know if I can contribute.

It would be good to have
* a section on rhoThermo vs. psiThermo (for ideal gas eg.) (bits and pieces are on thus forum already);
* a section on boundary conditions (bits and pieces are on thus forum already);
* a section explaining the transonic switch;
* a section explaining the need to limit temperature and velocity (as e.g. HPE recently recommended);
* a link to examples and tutorials;

Cheers, Domenico.

May 13, 2020, 23:10	rhoSimpleFoam vs rhoCentralFoam	#1
harsha_kulkarni Senior Member harshawardhank Join Date: Mar 2014 Posts: 209 Rep Power: 13	What is the difference between rhoSimpleFoam and rhoCentralFoam???

May 14, 2020, 02:03		#2
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 932 Rep Power: 12	Hi - Do you have any pre-investigation or summary of your current findings that you would like to share with us to have a kickstart, if possible. __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

May 14, 2020, 02:22		#4
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 932 Rep Power: 12	- It should be straightforward to search web to get a preliminary information to isolate your questions, and help others in the forum. - Hope you find a solution to your problem. __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

December 1, 2020, 02:57		#5
mAlletto Senior Member Michael Alletto Join Date: Jun 2018 Location: Bremen Posts: 615 Rep Power: 15	So just a quick start for those how see this thread: rhoCentralFoam is a unsteady density based compressible solver. rhoSimpleFoam is a steady pressure based compressible solver. A short description of the solver rhoCentralFoam can be found in this thesis which also provided a description of sonicFoam which is a pressure based unsteady solver: https://www.researchgate.net/profile...teractions.pdf The original (at least the oldest i could find) paper describing rhoCentralFaom is the following: https://home.cscamm.umd.edu/centpack...9-centpack.pdf I started a wiki with the description of rhoSimpleFoam. However it is still work in progress: https://openfoamwiki.net/index.php/RhoSimpleFoam This book https://www.springer.com/de/book/9783319168739 provides an excellent overview of the numerics in OF and also the derivation of the pressure based compressible solver dlahaye and yueyun like this. Last edited by mAlletto; December 1, 2020 at 04:12.

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December 1, 2020, 07:47		#6
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 723 Blog Entries: 1 Rep Power: 17	Thank a bundle for sharing the reference of rhoSimpleFoam. I am happy to support a wiki page on rhoSimpleFoam. Please let me know if I can contribute. It would be good to have * a section on rhoThermo vs. psiThermo (for ideal gas eg.) (bits and pieces are on thus forum already); * a section on boundary conditions (bits and pieces are on thus forum already); * a section explaining the transonic switch; * a section explaining the need to limit temperature and velocity (as e.g. HPE recently recommended); * a link to examples and tutorials; Cheers, Domenico.