[Gmsh] Problem with boundary layer in gmsh

["Max Wörle"]

Hello,
I want to create a boundary layer at the bottom of the blade, which you can see in the attached picture. I tried a lot of things to create it, using surface, edges and nodes, but it doesn´t work. Can you please help me?
Here is the text of my .geo-file. The model i´m using is a .step-file with big dimensions (length 32000mm).
 

Mesh.CharacteristicLengthFactor = 1.;
Geometry.OCCSewFaces = 1.;
//Geometry.OCCConnectFaces = 1.;
Geometry.Tolerance = 0.02;
 
Merge "2904blade.stp";
 
Coherence;
Surface Loop(19) = {5, 8, 7, 1, 9, 2, 3, 6, 4};
Volume(20) = {19};
 
Characteristic Length {9, 10, 7, 8} = 200.;
Characteristic Length {5, 6, 11, 12} = 400.;
Field[1] = BoundaryLayer;
Field[1].EdgesList = {6,14,15,16};
//Field[1].NodesList = {5,6,11,12};
Field[1].FanNodesList = {5,6,11,12};
//Field[1].FacesList = {1};
//Field[1].hfar = 150.;
Field[1].hwall_n = 50.;
Field[1].hwall_t = 80.;
Field[1].thickness = 200.;
//Field[1].Quads = 0;
Field[1].ratio = 1;
BoundaryLayer Field = 1;
 
 
Thank you, best regards
 
Maximilian Wörle
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