[saeed jamshidi]

hi,
i have a problem when i want to run simpleFoam for backwardFacingStep2D in openFoam after the below procedures. would you please guide me at this matter (error at loading file ''p'' appeared)?


myopenfoam@DESKTOP-TK3D7CI:~$ cd ~
myopenfoam@DESKTOP-TK3D7CI:~$ mkdir -p OpenFOAM-sims/tutorials
myopenfoam@DESKTOP-TK3D7CI:~$ cp -r $FOAM_TUTORIALS/incompressible OpenFOAM-sims/tutorials
myopenfoam@DESKTOP-TK3D7CI:~$ cd OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D
myopenfoam@DESKTOP-TK3D7CI:~/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D$ blockMesh > log.blockMesh
myopenfoam@DESKTOP-TK3D7CI:~/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D$ simpleFoam > log.simpleFoam


--> FOAM FATAL ERROR: (openfoam-2112 patch=220610)
cannot find file "/home/myopenfoam/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D/0/p"

From virtual Foam::autoPtr<Foam::ISstream> Foam::fileOperations::uncollatedFileOperation::rea dStream(Foam::regIOobject&, const Foam::fileName&, const Foam::word&, bool) const
in file global/fileOperations/uncollatedFileOperation/uncollatedFileOperation.C at line 542.

FOAM exiting

myopenfoam@DESKTOP-TK3D7CI:~/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D$ simpleFoam
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2112 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : _6e1fca0e-20220610 OPENFOAM=2112 patch=220610 version=2112
Arch : "LSB;label=32;scalar=64"
Exec : simpleFoam
Date : Aug 06 2023
Time : 09:46:34
Host : DESKTOP-TK3D7CI
PID : 4958
I/O : uncollated
Case : /home/myopenfoam/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D
nProcs : 1
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20)
allowSystemOperations : Allowing user-supplied system call operations

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

Create mesh for time = 0


SIMPLE: convergence criteria
field p tolerance 0.0001
field U tolerance 1e-06
field "(k|epsilon|omega|f|v2)" tolerance 1e-05

Reading field p



--> FOAM FATAL ERROR: (openfoam-2112 patch=220610)
cannot find file "/home/myopenfoam/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D/0/p"

From virtual Foam::autoPtr<Foam::ISstream> Foam::fileOperations::uncollatedFileOperation::rea dStream(Foam::regIOobject&, const Foam::fileName&, const Foam::word&, bool) const
in file global/fileOperations/uncollatedFileOperation/uncollatedFileOperation.C at line 542.

FOAM exiting

myopenfoam@DESKTOP-TK3D7CI:~/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D$

[Yann]

Hello,

The error message is pretty straightforward:

Originally Posted by saeed jamshidi

--> FOAM FATAL ERROR: (openfoam-2112 patch=220610)
cannot find file "/home/myopenfoam/OpenFOAM-sims/tutorials/incompressible/simpleFoam/backwardFacingStep2D/0/p"

The solver cannot start because it cannot find a 0 directory containing a p file (the file containing the boundary conditions and initialization for pressure).
If you look at your case directory, you will see you have a 0.orig directory instead. You need to copy this directory to create a 0 directory before running your case. Something like:

cp -r 0.orig 0

Most of the tutorials have an Allrun script in order to run the tutorial. If you look at the one for backwardFacingStep2D, you will see a restore0Dir command before running blockMesh and simpleFoam. restore0Dir does exactly this: copy 0.orig into 0.

Cheers,
Yann

[saeed jamshidi]

thank you dear Yann. that was helpful.