[taxalian]

Hi,

I have been using engrid now for quite a while and i always used default prism generation settings to obtain the viscous mesh. But at the moment i would like to control the initial prism layer height manually i.e user defined. I tried to modify the boundary layer parameters but to no success at all.

I am using Engrid V1.4 and the parameters related to prismatic boundary layer generation are seems to be default fixed values because if you try to tweak them engrid complains about that and mostly it gives some internal error and then you have to restart engrid:

relative height of first cell = 0.001 (default)
absolute height of first cell = 1.0 (default)
ratio last layer/farfield = 0.8 (default)

So now here the question is engrid uses kind of top - down prism generation approach. First of all the single prismatic layer is generated around the viscous wall. Then later on this single layer is divided into further prismatic layers. What if i want to have a specific boundary layer thickness say at trailing edge of the wing or at certain distance downstream over the flat plate or cylinder etc. How can i achieve this i tried to tweak these parameters and also some additional parameters but no improvement.

Thanks and regards.