Hi Bill, I guess I have to go back to the original question I asked. The code you gave works fine for thick airfoils with round leading and trailing edge. I tried to reduce the thickness to a few percent, 2% for example, it did not get an overlapping grid. I noticed that you use mapping from normal to get the volume grid. I looked at the volume grid for both caps, the outer boundary surface are skewed. This is very similar to the situation with o-grid when the airfoil is thin. Is there a way the users can control the quality of the outer boundary grid distribution? Yongsheng On Sun, Nov 15, 2009 at 11:25 PM, Bill Henshaw <henshaw@xxxxxxxx> wrote: > Hi Yongsheng, > > Yongsheng Lian wrote: >> >> Bill, >> >> Here are two follow up questions. >> >> First, does the subroutine in MovingGrids.C move each movable >> component simultaneously before update the whole grid or move one >> (then update the grid) and move another (then update the grid again)? >> For the 3-D wing case, since the caps need to move with the wing >> together as a rigid body, it may cause some problems if they move >> separately. If not, any suggestion to change the code? > > All grids are moved before the overlapping grid is regenerated. > >> >> Second, what does DataPointMapping do? For the 3D wing case if I do >> not use the datapointmapping, the command file failed to generate the >> overlapping grid. If I turn it on, though there are several warnings, >> it generates a grid. > > I am not sure what you are referring to. There was no DataPointMapping > in the wing3d.cmd that I sent out. In any case it is always best to > supply a specific command file that shows the problem. > > Regards, > Bill. > >> >> Thanks, >> Yongsheng >> >> > >