[Gmsh] Airfoil meshing Naca 0012

[Emanuele T.]

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 <ericnutsch at gmail.com>

> 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. <nuovodna at gmail.com> 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 <ericnutsch at gmail.com>
> >>
> >> 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. <nuovodna at gmail.com>
> wrote:
> >> > I attach my current .geo file
> >> >
> >> > 2010/2/20 Emanuele T. <nuovodna at gmail.com>
> >> >>
> >> >> 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 <ericnutsch at gmail.com>
> >> >>>
> >> >>> 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. <nuovodna at gmail.com>
> >> >>> 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
> >> >>> > gmsh at geuz.org
> >> >>> > http://www.geuz.org/mailman/listinfo/gmsh
> >> >>> >
> >> >>> >
> >> >>
> >> >
> >> >
> >
> >
>
> _______________________________________________
> gmsh mailing list
> gmsh at geuz.org
> http://www.geuz.org/mailman/listinfo/gmsh
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20100221/f305c26d/attachment.html>