[Bando]

Hello there

i have a little problem while converting a mesh, created with gridgen with the fluentMeshToFoam command.
i want to simulate a 2D convergent-divergent axisymmetric nozzle. therefore i first created just one half of the 2D model. So i have 4 boundaries, one wall in the shape of the nozzle, one symmetrie plane as the axis, inlet and outlet. when i want to convert that mesh file everything works just fine the way it should.

but when i want to convert the meshfile for the whole 2D nozzle openfoam complains about periodic patches. but i dont have any periodic or symmetry boundarys, just the upper and lower nozzle wall, inlet and outlet. thats why i am a little bit confused about the error and not really shure about what to do.

i do know that during the lexing he mentions an periodic patch, but i don't know why, because the only boundary conditions set in gridgen are wall, velocity-inlet and pressure-outlet.


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

Reading header: "exported from Gridgen 15.10R1"
Dimension of grid: 2
Number of points: 1798
number of faces: 3507
Number of cells: 1710
Reading points
Other readCellGroupData: 2 1 6ae 1 3
Reading uniform cells
Read zone1:2 name:fluid patchTypeID:fluid
Reading zone data
Embedded blocks in comment or unknown: (
Found end of section in unknown
,Reading uniform faces
Read zone1:3 name:interior-3 patchTypeID:interior
Reading zone data
Embedded blocks in comment or unknown: (
Found end of section in unknown
,Reading uniform faces
Read zone1:4 nameeriodic-4 patchTypeIDeriodic
Reading zone data
Embedded blocks in comment or unknown: (
Found end of section in unknown
,Reading uniform faces
Read zone1:5 name:shadow-5 patchTypeID:shadow
Reading zone data
Embedded blocks in comment or unknown: (
Found end of section in unknown:
,Reading uniform faces
Read zone1:6 name:velocity-inlet-6 patchTypeID:velocity-inlet
Reading zone data
Embedded blocks in comment or unknown: (
Found end of section in unknown:
,Reading uniform faces
Read zone1:7 nameressure-outlet-7 patchTypeIDressure-outlet
Reading zone data
Embedded blocks in comment or unknown: (
Found end of section in unknown
8 (1 8 4 5Embedded blocks in comment or unknown: (
Found end of section in unknown:
8 (1 2 4 5Embedded blocks in comment or unknown: (
Found end of section in unknown:
8 (1 9 4 5Embedded blocks in comment or unknown: (
Found end of section in unknown
8 (1 26 4 5

FINISHED LEXING


dimension of grid: 2
Grid is 2-D. Extruding in z-direction by: 0.0223607
Creating shapes for 2-D cells
Building patch-less mesh...--> FOAM Warning :
From function polyMesh:olyMesh(... construct from shapes...)
in file meshes/polyMesh/polyMeshFromShapeMesh.C at line 619
Found 3594 undefined faces in mesh; adding to default patch.
done.

Building boundary and internal patches.
Creating patch 0 for zone: 3 start: 1 end: 3333 type: interior name: interior-3
Creating patch 1 for zone: 4 start: 3334 end: 3390 type: periodic name: periodic-4


--> FOAM FATAL ERROR:
fluent patch type periodic not recognised.

From function fluentToFoam::main(int argc, char*argv[ ])
in file fluentMeshToFoam.L at line 1344.

FOAM aborting




hopefully someone has a clue how to solve my problem.

thanks a lot!

Bando