[esgee]

I'm blocking and meshing a domain depicted in the figure below. The two rectangles and the triangle with a fillet in the tip are not included in the fluid zone. My problem is that I haven't managed to create a satisfactory mesh for the domain near the triangle surface, there are some non-orthogonal faces.

I've attached pictures of my current blocking and mesh. I'm sure that this is an easy task but I just can't figure it out.

[FJSJ]

Can you share your .tin file?

[RodriguezFatz]

Hi,
Your mesh (3rd picture) looks bad... the triangle looks like a pyramid, did you assign all edges to the curves? Some of the quads are "cutted" at the edge of the triangle.

Anyway: If I recall correctly, user "far" showed a good blocking for triangles in some thread, maybe that helps:
triangle meshing.png

[Far]

there is no triangular block at all

What he needs is the Ogrid around round triangular surface and inside it as well

[esgee]

Thanks for replys. RodriguezFatz: yes, I did assign them. I also found this video a few days ago http://www.youtube.com/watch?v=92vScop7b8Q but didn't manage to get things working.

Anyway, I will be out of office until Monday but will report my results after giving it another try.

[RodriguezFatz]

Originally Posted by Far

there is no triangular block at all

But what about the triangular faces of the middle body? He needs to mesh the front and back of it.


@esgee: Did you cut the middle body, or why does the screenshot of the grid look so strange?

[Far]

Just think it as a circular leading edge of wing and apply same strategy as you would apply there

[RodriguezFatz]

Why not like this?
blocking.png

[Far]

This is the best option if your geometry is of triangle shape. If it is round at corner then you need ogrid inside and outside

[RodriguezFatz]

Yes the top hexas will be crap in my blocking...

[Far]

Originally Posted by RodriguezFatz

Yes the top hexas will be crap in my blocking...

Not exactly. The blocking you have shown will give a reasonable quality. However best option is O-grid

[RodriguezFatz]

Originally Posted by Far

Not exactly. The blocking you have shown will give a reasonable quality. However best option is O-grid

Doesn't that depend strongly on the way the flow takes, i.e. on the inlet and outlet positions?

[FJSJ]

Hi guys,

I´ve done a quickly blocking. I think this blocking can be improve better, maybe this block is similar to Philipp´s idea. Anyway, if anybody want to try I give you the geom here!

https://www.dropbox.com/s/heej79l4v9...riangleBox.rar

[FJSJ]

Far, would be so kind draw a simple picture with the blocking approach? I mean, like Philipp did. It´s only to see the blocking shapes arround the round tip. Thank you!

[esgee]

Hello again. I tried to apply same approach as FJSJ but my grid is still bad.

e: I finally managed to solve it. Thanks for your kind effort.

[FJSJ]

well, it´s not my approach, in any way, it would be Philipp´s approach. Anyway, this is not the best blocking. Far´s idea is the best, at least, I think so. But I would see some picture with blocking edge, like Philipp did.

[Far]

Originally Posted by FJSJ

Far, would be so kind draw a simple picture with the blocking approach? I mean, like Philipp did. It´s only to see the blocking shapes arround the round tip. Thank you!

Sorry for long delay, I was busy with making end term exam paper and other stuff at university

Min quality 0.66 and min angle 44.

Files are attached.

Here is the blocking:











PS: Dedicated to Simon

[FJSJ]

Thanks you for explaining the blocking with the O-grid!

[Far]

Was mine blocking different? did it give you good quality?

[mojtaba12]

Hi Far
I have to mesh the fluid around this 3d Wing. As you see i have a complex 3D Wing and i have to mesh it, the problem is the vertical part of the wing and as you see here i have splitted it to 3 parts. To have a good mesh i need to split the left and right Blocks to Blocks with triangle Surfaces to fit with the parts of vertical Surface.

Could you please give me an idea to do that or mesh it?

Thanks