[Micha69822]

Hello together,

at the last few days I work with cfMesh. I find it is a good mesher and make good boundary layers. However I have at the moment a problem with the layers. I adjust layer on the wall in the meshDict, but I get overall (inlet, outlet, walls) layers.

Here the meshDict:

    
patchBoundaryLayers
{    
        walls
        {
                nLayers 5;
                thicknessRatio 1.2;
                maxFirstLayerThickness 0.0002;
                allowDiscontinuity 0;
        }
}

The mesh is shown in the appendix.

Have someone an idea where is my failure?

[Coris]

Here is some code that will help you:

// settings for boundary layers
boundaryLayers
{
nLayers 3;
thicknessRatio 1.2;

patchBoundaryLayers
{
inlet
{
nLayers 0;
}
}
}

[Micha69822]

Hy Coris,

thank you for our reply.

I try you suggestion but it didn't work.
Attached you will find two pictures. At the top I used the default for layers (all boundarys). Below you see that I used default for layers at wall and I defined separate 0 layers for in- and outlet. But at the picture you see, that there are no layers.

Do you can help with this problem?

[monkey1]

Not sure if it helps,
but we are facing similar problems and just found out, that when you set:
allowdiscontinuity = 0
and define on any patch that nlayers = 0 then he will apply the 0 to ALL patches.
To (try) to define nlayers for each patch separately you seem to need an
allowdiscontinuity = 1

But we are also still experimenting how to set it correctly.

[Matheus Marques]

Michael, did it work with you when we chance allowDiscontinuity from 0 to 1?