Thanks for the tip. Now i have a 2D mesh not so bad (i played with different lc to create a more detailed mesh in the trailing and leading edge of the airfoil). Now i ll try to import this in OpenFOAM using extrude utility and the tutorials you linked me in the other thread
Thanks again 2010/2/20 Eric Nutsch <[email protected]> > 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 >
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