|
Domain shape for meshing missile - ICEM HEXA
I am meshing a missile configuration with card and fins. Total four canards and four fins and both are offset by 45 to each other. Used X-y and X-Z symmetry to reduced model to 1/4 of original.
Done all associations, Ogrid around canard, fins and fuselage. I am just wondering should I use rectangle domain or circular cylinder domain? |
go with a circular domain like the shape of the missile
|
I have seen it done both ways with good success, but if I had to pick one as "better", I would also go with the cylinder because it uses the elements most efficiently and with the least unnecessary distortion.
|
After apply two symmetrie, canard (four in no.) are divided into half. so i have one (half) canard in Y direction and one (half) in Z direction. Now dealing with this situation is easy and efficient in rectangle domain.
Next component is fin (four in no) which are offset by 45 deg from canards. Therefore I have one full fin at 45 deg from Z and Y. This is where I get problem in rectangular domain. Can I use rectangle domain efficiently for this situation? |
Hi Far,
I have no experience in this but you should give it a try with a rotated rectangular domain and find that out. Regards. |
I tried with circular domain and it is great.
Following are the images of ICEM CFD blocking/mesh from drag prediction workshop 2. Domain shape is rectangular and it is the best choice for such configurations. But for the cases with some components offset by 45 deg, I guess circular domain is the best. http://imageshack.us/a/img845/9291/l99r.jpg http://imageshack.us/a/img571/1941/tlcu.jpg http://imageshack.us/a/img442/3264/rvvg.jpg http://imageshack.us/a/img853/5685/6np4.jpg I am particularly interested in the blocking in the tip region of wing. Why they have used nested O-grid in only small portion of tip block in tip region and why o-grid was not extended to far field? For what shapes we should use closed o-grids and when we should go for the extended o-grid to farfield? http://imageshack.us/a/img197/6721/772v.jpg http://imageshack.us/a/img14/7718/cz9r.jpg http://imageshack.us/a/img138/9820/bgjd.jpg http://imageshack.us/a/img826/6194/vbvk.jpg |
| All times are GMT -4. The time now is 06:52. |