[odellar]

Hi,

If someone has answered this question before I apologise, but I've been searching for a long time across various forums and haven't managed to solve my problem.

I've got a geometry that is essentially an S-shaped pipe with one inlet and one outlet (both of which have the same surfaces area).

So I've set the inlet and outlet as patches, the 'top' and 'bottom' of the pipe as walls, and the 'front' and 'back' of the pipe as 'empty' since I just want a 2D solution.

I want a uniform inlet velocity of 1 m/s, and based on the continuity equation, the outlet velocity is 1 m/s as well (as it has the same surface area and my flow is incompressible).

I'm using a RAS k-epsilon solver.

This is where I have defined walls & patches etc in the blockMeshDict file:

boundary
(
    inlet
    {
        type patch;
        faces
        (
            (0 3 13 10)
        );
    }
    outlet
    {
        type patch;
        faces
        (
            (8 9 19 18)
        );
    }
    fixedWalls
    {
        type wall;
        faces
        (
            (3 2 12 13)
            (2 7 17 12)
            (7 6 16 17)
            (6 9 19 16)
            (0 1 11 10)
            (1 4 14 11)
            (4 5 15 14)
            (5 8 18 15)
        );
    }
);

(Note that I can view the geometry in ParaView and it looks correct so I don't think this is the issue).

This is where I have defined velocities (in 0/U):

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    inlet
    {
        type            fixedValue;
        value           uniform (1 0 0);
    }

    outlet
    {
        type            pressureInletOutletVelocity;
        value           uniform (0 0 0);
    }


    fixedWalls
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }

    frontAndBack
    {
        type            empty;
    }
}

and this is where I have defined pressures:

dimensions      [0 2 -2 0 0 0 0];

internalField   uniform 0;

boundaryField
{
   

    inlet
    {
    type        zeroGradient;
    }

    outlet
    {
    type        zeroGradient;
    }

    fixedWalls
    {
        type            zeroGradient;
    }

    frontAndBack
    {
        type            empty;
    }
}

When I run pisoFoam it gives this error:

--> FOAM FATAL IO ERROR: 
Cannot find patchField entry for outlet

file: /home/olie/OpenFOAM/olie-2.2.1/run/tutorials/incompressible/pisoFoam/ras/s_shape/0/epsilon.boundaryField from line 26 to line 41.

I'm very new to OpenFOAM and wouldn't be at all surprised if I've just completely missed something.

Please ask if you'd like to see any of the other files, such as 0/epsilon or 0/k.

Thanks a lot for your time,
Olie

[odellar]

Sorry all I've sorted it, I'd missed out a semicolon on one line

If someone could let me know how I delete this thread I'll get rid of it.

Thanks
Olie

[range_rover]

it will be helpfull to others if you specify where was the collan missing in the script

[deborahgomess]

It help me a lot! You have no idea!
I was missing a semicolon too! After a parenthesis when I set a nonuniform inlet value at the 0/alpha.air.org

Thank you!

[Gizazu]

Hi. I finally got the simulation working but i have a litlle problems with definition of delta T and courant number which sometimes send back an error during the process. Could you help me with this doubt? What possibly I´m doing wrong?

Another question is that I´m doing a 3D simulation but i can only see Ux and Uz during the calculation. Is that normal?

Please, somebody help me!!!


Regards

[kvk]

can you please tell me how did you solve the problem ?

[MoeCFD]

This article has helped me as well. I added semi colon after uniform ( );

[Nishant79]

I am facing the same error.How did you get rid of this error?

[reza2031]

I do not know if it helps. I had a similar error and finally found out that in blockMeshDict there was a typo in a boundary name.So, check the boundary names in 0 folder and blockMeshDict. Compare them, this might solve the error.

[A H Gazi]

I had a similar error. I have given double curly bracket before inlet.

boundaryField
{

back
{
type symmetryPlane;
}

front
{
type symmetryPlane;
}
}

inlet
{
type zeroGradient;
}
outlet
{
type zeroGradient;
}

[Abbasi_Maaz]

Also Make sure that there is no spaces in front of boundary name for example if you used "Outlet " (or any other boundary name) while initializing for pressure or velocity field instead of original "Outlet", it will also give you this error.

[zandi]

it helps me out from a silly mistake thanks for post

[neojarrah]

Originally Posted by reza2031

I do not know if it helps. I had a similar error and finally found out that in blockMeshDict there was a typo in a boundary name.So, check the boundary names in 0 folder and blockMeshDict. Compare them, this might solve the error.

thank you for your help，i have same mistake. XD

[alcarnielo]

Your tip really helped me a lot! This was exactly one of my errors in my simulation!

[wangjie]

Originally Posted by reza2031

I do not know if it helps. I had a similar error and finally found out that in blockMeshDict there was a typo in a boundary name.So, check the boundary names in 0 folder and blockMeshDict. Compare them, this might solve the error.

thanks a lot! I use your method and solve it .it 's a right way to compare the blockMeshDict and 0/doundaryDict ,check the boundary name and semicolon,you will find what's wrong.

[agogenola]

Thank you very much, It helped me a lot!

[phil_in_Tex]

You save me by putting me on the right track.
I had a naming mismatch case issue that also produced the same error.

[Airlia]

Hello

I have a geometry of an idealistic model of the cross-section of the human heart with four outlets and two inlets, and I specified both the solid wall and the flow wall. I can also inspect the geometry in Paraview, and all meshed regions are visible.

I received the error below while running pisoFoam, and I searched for a possible solution and came across this thread. I checked the boundary field code for syntax errors and found none, but I still get the same error

The error code I got after running pisoFoam;

--> FOAM FATAL IO ERROR:
Cannot find patchField entry for wall-part4_heart-cut-extrude8

file: /home/codebind/OpenFOAM/codebind-10/run/tutorials/incompressible/pisoFoam/LES/m2/0/p/boundaryField from line 24 to line 45.

From function void Foam::GeometricBoundaryField<Type, PatchField, GeoMesh>::readField(const Foam:imensionedField<TypeR, GeoMesh>&, const Foam::dictionary&) [with Type = double; PatchField = Foam::fvPatchField; GeoMesh = Foam::volMesh]
in file /home/ubuntu/OpenFOAM/OpenFOAM-10/src/OpenFOAM/lnInclude/GeometricBoundaryField.C at line 187.


Boundary field Code (with the error):
/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 10
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
format ascii;
class volScalarField;
object p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 2 -2 0 0 0 0];

internalField uniform 0;

boundaryField
{
inlet
{
type zeroGradient;
}

outlet
{
type fixedValue;
value uniform 0;
}

upperWall
{
type zeroGradient;
}

lowerWall
{
type zeroGradient;
}

frontAndBack
{
type empty;
}
}

// ************************************************** *********************** //
Boundary Code:
/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 10
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
format ascii;
class polyBoundaryMesh;
location "constant/polyMesh";
object boundary;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

13
(
wall-part4_heart-cut-extrude8
{
type wall;
inGroups List<word> 1(wall);
nFaces 1614;
startFace 1779560;
}
outlet1
{
type patch;
nFaces 146;
startFace 1781174;
}
outlet2
{
type patch;
nFaces 205;
startFace 1781320;
}
inlet1
{
type patch;
nFaces 138;
startFace 1781525;
}
inlet2
{
type patch;
nFaces 145;
startFace 1781663;
}
inlet3
{
type patch;
nFaces 146;
startFace 1781808;
}
inlet4
{
type patch;
nFaces 205;
startFace 1781954;
}
solidwall-part4_heart-sweep6
{
type wall;
inGroups List<word> 1(wall);
nFaces 6688;
startFace 1782159;
}
solidwall-part4_heart-sweep5
{
type wall;
inGroups List<word> 1(wall);
nFaces 4690;
startFace 1788847;
}
solidwall-part4_heart-cut-extrude8
{
type wall;
inGroups List<word> 1(wall);
nFaces 16043;
startFace 1793537;
}
flowwall
{
type wall;
inGroups List<word> 1(wall);
nFaces 66993;
startFace 1809580;
}
solidwall-contact_region-src
{
type patch;
nFaces 3920;
startFace 1876573;
}
solidwall-contact_region-trg
{
type patch;
nFaces 3580;
startFace 1880493;
}
)

// ************************************************** *********************** //


I'm new to OpenFoam and would greatly appreciate any assistance.

Thank you so much, Airlia.

[Yann]

Hello Airlia,

Here is your error:

--> FOAM FATAL IO ERROR:
Cannot find patchField entry for wall-part4_heart-cut-extrude8

file: /home/codebind/OpenFOAM/codebind-10/run/tutorials/incompressible/pisoFoam/LES/m2/0/p/boundaryField from line 24 to line 45.

It means you need to have a boundary condition defined for wall-part4_heart-cut-extrude8 in the p file.
According to the p file you posted here, this is not the case.

Basically, all the entities listed in the boundary file needs to have boundary conditions in 0 directory, for each variable solved.

Cheers,
Yann

[Airlia]

Thank you so much, it worked!