porousSimpleFoam, slow convergence?

JoaoDMiranda · September 3, 2019, 08:58

Dear All,

First of all thanks a lot in advance for any help that can be provided.
I am currently using the porousSimpleFoam solver and I noticed that convergence of the porous region is quite slow.

I tested a simple channel with a porous region (full height and width of the channel) and the results were satisfactory. On the other hand, when I use a "floating" porous block in free flow, I noticed that the convergence was very slow.

The solver settings and mesh are the same as the case provided.

Thanks a lot for any help that can be provided.

Best wishes,

João

Case:
https://send.firefox.com/download/37...zx8QBDGflVsPqA

wouterremmerie · September 24, 2019, 07:53

Hi Joao,

could it perhaps be that there is a general slow down in OpenFOAM as soon as you start using optional elements like porous media or rotating elements (MRF, ...)?

Has anyone else experienced slow convergence when using optional elements combined with simplefoam (or other solvers)?

Thanks!

September 3, 2019, 08:58	porousSimpleFoam, slow convergence?	#1
JoaoDMiranda New Member João Duarte Miranda Join Date: Jan 2012 Posts: 13 Rep Power: 14	Dear All, First of all thanks a lot in advance for any help that can be provided. I am currently using the porousSimpleFoam solver and I noticed that convergence of the porous region is quite slow. I tested a simple channel with a porous region (full height and width of the channel) and the results were satisfactory. On the other hand, when I use a "floating" porous block in free flow, I noticed that the convergence was very slow. The solver settings and mesh are the same as the case provided. Thanks a lot for any help that can be provided. Best wishes, João Case: https://send.firefox.com/download/37...zx8QBDGflVsPqA Last edited by JoaoDMiranda; September 24, 2019 at 07:21.

September 24, 2019, 07:53	General slow down when using options?	#2
wouterremmerie Member Wouter Join Date: Aug 2013 Posts: 41 Rep Power: 13	Hi Joao, could it perhaps be that there is a general slow down in OpenFOAM as soon as you start using optional elements like porous media or rotating elements (MRF, ...)? Has anyone else experienced slow convergence when using optional elements combined with simplefoam (or other solvers)? Thanks!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
MRFSimpleFoam for a centrifugal pump (OF Extend 4.0): slow and no convergence	jgross	OpenFOAM Running, Solving & CFD	6	February 17, 2018 10:37
Very slow convergence for transient flow	Akanksha90	STAR-CCM+	3	February 7, 2018 20:42
Convergence in steady state simulations vs transient ones	cardioCFD	CFX	5	January 21, 2018 11:59
Convergence becomes very slow after adding thin material model for CHT	Anna Tian	CFX	1	June 6, 2013 19:03
Slow convergence using mass flow BC	vitulaaak	CFX	4	November 7, 2012 11:22