Hi Nikola,

Sorry for the really late reply. I've had this post of yours on my to-do list and only today did I finally take a look into this.

Yes.

Yes, the "rightLet" and "leftLet" patches are where we would want the cyclic boundary condition for making it act as an infinite wall. I like to think of this as matter teleportation with conservation of momentum and continuity... i.e. a portal ;)

Using the symmetry plane is mostly an alternative to using the boundary condition "slip", which sort-of represents infinity in the sense of "well, everything else beyond this boundary is identical in profile (gradient) to whatever is acting on this surface". It's in contrast to defining a zero gradient boundary condition, which enforces that the value on the face is identical to the cell centre, which means that enforces a constraint that can affect the results in an unwanted way, sort of like bending the tip of a straw.

Best regards,
Bruno

Error in OF 1606+ Windows version
 

Hello,
I downloaded the file and run Allrun which worked file. The chtMultiRegionSimpleFoam erred. Following is the terminal message - a bit difficult to debug for non-programmers :)

Any comment!

Thanks!

[ofuser@default planeWall2D]$ chtMultiRegionSimpleFoam
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1606+ |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : v1606+
Exec : chtMultiRegionSimpleFoam
Date : Jul 14 2017
Time : 11:40:00
Host : "default"
PID : 451
Case : /home/ofuser/workingDir/of_Simu/planeWall2D
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create fluid mesh for region bottomAir for time = 0

Create fluid mesh for region topAir for time = 0

Create solid mesh for region wall for time = 0

*** Reading fluid mesh thermophysical properties for region bottomAir

Adding to thermoFluid

Selecting thermodynamics package
{
type heRhoThermo;
mixture pureMixture;
transport const;
thermo hConst;
equationOfState perfectGas;
specie specie;
energy sensibleEnthalpy;
}

#0 Foam::error::printStack(Foam::Ostream&) in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so"
#1 Foam::sigFpe::sigHandler(int) in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so"
#2 ? in "/lib64/libc.so.6"
#3 Foam::heRhoThermo<Foam::rhoThermo, Foam::pureMixture<Foam::constTransport<Foam::speci es::thermo<Foam::hConstThermo<Foam::perfectGas<Foa m::specie> >, Foam::sensibleEnthalpy> > > >::calculate() in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so"
#4 Foam::rhoThermo::addfvMeshConstructorToTable<Foam: :heRhoThermo<Foam::rhoThermo, Foam::pureMixture<Foam::constTransport<Foam::speci es::thermo<Foam::hConstThermo<Foam::perfectGas<Foa m::specie> >, Foam::sensibleEnthalpy> > > > >::New(Foam::fvMesh const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so"
#5 Foam::autoPtr<Foam::rhoThermo> Foam::basicThermo::New<Foam::rhoThermo>(Foam::fvMe sh const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so"
#6 Foam::rhoThermo::New(Foam::fvMesh const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so"
#7 ? in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/chtMultiRegionSimpleFoam"
#8 __libc_start_main in "/lib64/libc.so.6"
#9 ? in "/opt/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/chtMultiRegionSimpleFoam"
Floating point exception

Update: on previous post
 

Hello,
Please ignore my previous post on this thread :D

Without knowing what the error was, I tried to combine the information available at http://openfoamwiki.net/index.php/Ge..._-_planeWall2D

and tutorial folder chtMultiRegionFoam/multiRegionHeater. This time I was able to successfully make the runs. Further, I have tried to explain the insight I got into the problem in the attached file. Hope this will help and any error/suggestions would be highly appreciated.

Regards,
Amod

File upload again
 

It seems the file did not get uploaded as the file size exceed limit. Even zipping did not work. I have attached 3 files.

The PDF can be downloaded from here
http://www.cfdyna.com/Home/OpenFOAM/...RegionFoam.pdf