Your mesh is working, you just had all the CharLenghts set the large and the same. I did a find-replace " 1}" with " 0.01}" then set the far field CharLenghts and the variables with a 0.01 on them back to 1. (this is a prime example of why you should use variables to do this, read userguide tutorials for more info)
I tested it, it looks good. Dont worry about being a newbe, just share the knowedge you have and expect others to do the same :) Eric Nutsch On Sat, Feb 20, 2010 at 12:50 PM, Emanuele T. <[email protected]> wrote: > 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 >> >>> > >> >>> > >> >> >> > >> > > > _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
