[lcaBR]

Hi guys!

Could you please advise as how to mesh the sharp tip of an engine spinner? My first attachment shows what I've got. Don't bother with element sizes, I've set a course mesh indeed.

I reckon I should not split the block as I did in the 1st image and put the 4 vertices in a single point, that is, the tip. This would give me quite skewed elements, not good.

A way out is to do something similar to my 2nd attachment.

Now the question, how I make it? It's not mine and I can't quite figure his blocking strategy and how he managed to do it. I've been trying not successfully as my 3rd attachment shows.

So, any ideas?!

Cheers

[diamondx]

Have you solved your problem ?

[lcaBR]

Hi Ghazlani,

Well, sort of, I've actualy done something to avoid this situation. I modified the CAD geometry and made the tip flat near the leading point so that I can simply mesh this new surface.

I'm having some other issues though.

Can I ask which is the right approach when performing a fully structured multi block mesh? My farfield is a semisphere, but my pre-mesh gets me overlapping and negative volume elements in the first o-grid (from the central block edges up to the outer bounday of the semisphere). Why does it happen? I mean, it's just a semisphere, shouldn't be a big deal. All the remaining looks fine when I check it, but the simpler part gets messed up. I realized that if I smooth the mesh, it takes me hours but gets me the farfield fixed. However, it messes with the geometry surface mesh (negative volume).

Should I smooth the farfield o-grid first before keeping on with the blocking? Is it the usual approach?

[Far]

you can follow steps in tutorial "hexa meshing around a cone" on ansys portal

[Far]

here is the snapshot for the type1 blocking (total 3 blocking methods are shown in tut)