[Ananthakrishnan]

Thanks a lot Simon, It is great..I am just working on improving the quality a bit..

I have one doubt left... .. It is about the conceptual requirement of the o grid (wing box) inside the wing..I didnt understand when you said "to collapse the trialing edge, a wing box is required required inside the wing"...
Can anyone explain it a little more..

@Ralen and Far---after applying yblock for the triangular elements, worst quality by det 3*3*3 is around 0.6

[PSYMN]

I didnt understand when you said "to collapse the trialing edge, a wing box is required required inside the wing"...

I just meant that you can't put an OGrid inside a wedge... At least I don't think you can (I don't think I have tried it many years). So you must split your wedge so that you have a box and a wedge, then you can put the Ogrid inside the box...

It is still not perfect because while the leading edge side of the OGrid solves your 180 degree element problem, the other side gives you 45 degree elements (Probably not a problem for the solver, but not ideal either)... If you created the Ogrid in the wing before collapsing the trailing edge, I guess you could collapse the back side of the Ogrid and have three wedge blocks inside the wing profile, but that topology would require starting over.

[Far]

after applying yblock for the triangular elements(wedge blocks), worst quality by det 3*3*3 is around 0.6

This is more than better.

[Far]

So you must split your wedge so that you have a box and a wedge, then you can put the Ogrid inside the box...

You mean that either put the o-block before collapse (before wedge block is formed) command or make the box (four sides), where one can put the o-block. It is very much clear to me, if I am getting you right.

@Ananthakrishnan: In wedge block, you cannot put the o-block with simple command, because it will again give you wedge block. For this you need to think the some innovative method.

It is also discussed here http://www.cfd-online.com/Forums/ans...mesh-wing.html with different methods.