Thanks for the answer and sorry for my newbie questions. I' m not yet able to create an hole in the farfield. I created the two line loops and made a plane surface using these two loop lines. When i try to mesh in 2d airfoil is not recognize like a hole and there are cell inside it. How can i solve? I tryed to change the characteristic length but nothing change. I attach my new .geo file
Thanks again 2010/2/20 Eric Nutsch <[email protected]> > Emanuele, > > > Well first you need to make 2 line loops, one for the airfoil and one > for the farfield(in userguide) > Then make a plane surface using the 2 loops.(userguide) > You will then be able to mesh > To control the mesh size use the characteristic length(userguide) > > If you want to then want to use a boundary layer you will be stuck the > same place as I. It is easy enough to create a boundary layer with the > extrude function, but I have yet to figure out how to attach it to a > farfield mesh. > > > Eric Nutsch > > > On Sat, Feb 20, 2010 at 7:29 AM, Emanuele T. <[email protected]> wrote: > > I attach my current .geo file > > > > 2010/2/20 Emanuele T. <[email protected]> > >> > >> Thanks for the tip. Now i have another problem. I prepared a .geo file > >> with an airfoil in a circular box. I'd like to obtain a mesh like in > >> attached picture. How can i realize this? > >> > >> 2010/2/19 Eric Nutsch <[email protected]> > >>> > >>> Emanuele, > >>> > >>> > >>> If by points you mean cells (for more resolution), you can use the > >>> gmsh "characteristic length" variable (lots of info in the user > >>> guide). > >>> > >>> If you actually want more points(not sure why) you would have to write > >>> an interpolation script outside of gmsh (python for instance) > >>> > >>> > >>> Eric Nutsch > >>> > >>> > >>> > >>> On Fri, Feb 19, 2010 at 12:15 PM, Emanuele T. <[email protected]> > wrote: > >>> > Hi, i wrote a mesh using naca 0012 points taken > >>> > > >>> > here > http://www.soton.ac.uk/~jps7/Aircraft%20Design%20Resources/Sydney%20aerodynamics%20for%20students/panel2d/naca0012.dat > >>> > I want to intensify the density of points near the leading edge and > the > >>> > trailing edge. How can i obtain this?? > >>> > Thanks > >>> > _______________________________________________ > >>> > gmsh mailing list > >>> > [email protected] > >>> > http://www.geuz.org/mailman/listinfo/gmsh > >>> > > >>> > > >> > > > > >
polimi.geo
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