About the big change in OpenFOAM-dev and OpenFOAM-11

sharonyue · July 13, 2023, 04:24

Hello Guys, I think you may notice that since OpenFOAM-dev, it has been re-written as:

> Version 11 introduces modular solvers written as classes, in contrast to the traditional application solvers, integral to OpenFOAM since icoFoam in 1993. Modular solvers are simpler to maintain and extend, and are more flexible for multi-region simulations, e.g. conjugate heat transfer (CHT) with any type of flow, e.g. multiphase. Everything is backward-compatible, so: 1) application solvers will still compile in OpenFOAM; 2) launching an old application solver, e.g. simpleFoam, executes a script which runs the incompressibleFluid module on a single region.

I want to know what do you think about this change.

tomf · July 18, 2023, 05:30

Hi,

For me the idea behind the change makes sense, both from the maintenance perspective as well as the user perspective. Basically we have only a few solvers where we add models as needed, so we can be much more flexible in the way we setup the cases.

The downside of course is that it requires users to change the setup of the cases and that may take some time to get used to. Additionally it may become harder for third party tools to be able to follow the development, which may mean that there will be less support. Others however may start fresh?

In the end I feel that it may give users more flexibility and allows to setup more complex cases without the need to do some coding.

Cheers,
Tom

mturcios777 · July 27, 2023, 18:41

So long as those who need to can still compile their own solvers for in-house operation. I've tried porting one we use in our company and its not going particularly smoothly now. I'm sure this will be great for those setting up simulations for production but a pain for researchers.

Has anyone tried to compile an in-house solver under OF11?

July 13, 2023, 04:24	About the big change in OpenFOAM-dev and OpenFOAM-11	#1
sharonyue Senior Member Dongyue Li Join Date: Jun 2012 Location: Beijing, China Posts: 849 Rep Power: 18	Hello Guys, I think you may notice that since OpenFOAM-dev, it has been re-written as: > Version 11 introduces modular solvers written as classes, in contrast to the traditional application solvers, integral to OpenFOAM since icoFoam in 1993. Modular solvers are simpler to maintain and extend, and are more flexible for multi-region simulations, e.g. conjugate heat transfer (CHT) with any type of flow, e.g. multiphase. Everything is backward-compatible, so: 1) application solvers will still compile in OpenFOAM; 2) launching an old application solver, e.g. simpleFoam, executes a script which runs the incompressibleFluid module on a single region. I want to know what do you think about this change. __________________ My OpenFOAM algorithm website: http://dyfluid.com By far the largest Chinese CFD-based forum: http://www.cfd-china.com/category/6/openfoam We provide lots of clusters to Chinese customers, and we are considering to do business overseas: http://dyfluid.com/DMCmodel.html

July 18, 2023, 05:30		#2
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 647 Rep Power: 32	Hi, For me the idea behind the change makes sense, both from the maintenance perspective as well as the user perspective. Basically we have only a few solvers where we add models as needed, so we can be much more flexible in the way we setup the cases. The downside of course is that it requires users to change the setup of the cases and that may take some time to get used to. Additionally it may become harder for third party tools to be able to follow the development, which may mean that there will be less support. Others however may start fresh? In the end I feel that it may give users more flexibility and allows to setup more complex cases without the need to do some coding. Cheers, Tom Last edited by tomf; July 24, 2023 at 10:21. Reason: typo

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July 27, 2023, 18:41		#3
mturcios777 Senior Member Marco A. Turcios Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 740 Rep Power: 28	So long as those who need to can still compile their own solvers for in-house operation. I've tried porting one we use in our company and its not going particularly smoothly now. I'm sure this will be great for those setting up simulations for production but a pain for researchers. Has anyone tried to compile an in-house solver under OF11?