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[ICEM] Tetra + prism turbine blade

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Old   June 21, 2012, 10:07
Default Tetra + prism turbine blade
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Hello, I am using Tetra + prism method to mesh fluid domain around a turbine blade.I have got good elements except around the tip and the root(see pics). I tried to smooth(first tetra then prism and tetra together),but even worse quality appeared.

Can anybody share any experience about this kind of cases? What is the difference between tick on and tick off the Laplace smooth function?I always got worse quality with it on.

Or the bad elements could be due to other factors?

Any advice is welcome.
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Old   June 21, 2012, 11:28
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For these type of cases ICEM Hexa is the best choice...
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Old   July 1, 2012, 06:41
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Quote:
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For these type of cases ICEM Hexa is the best choice...
Hello Far,

Thanks for your reply.

It is difficult to get a good quality using tetra+prisms while the boundary layer mesh goes too fine.

I have also tried ICEM hexa, using o block +split at the trailing edge, but resulted bad cells again around the sharp trailing edge .I have seen your video on youtube"wing with sharp trailing edge". I must missed something. I do not know if you could look at my problem here.
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Old   July 1, 2012, 06:59
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Ya you missed the o-grid in front half of leading block (inside) and Y block in aft tip block
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Old   July 1, 2012, 08:43
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Quote:
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Ya you missed the o-grid in front half of leading block (inside) and Y block in aft tip block
Is this what you mean? but i still got bad cells...
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Old   July 1, 2012, 08:45
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Quote:
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Is this what you mean? but i still got bad cells...
I didn't get you. Could you please elaborate more?
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Old   July 1, 2012, 08:45
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Sorry pic here
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Old   July 1, 2012, 08:46
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did you convert the wedge block into yblock?
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Old   July 1, 2012, 08:49
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Yes tried
but it seemed that it cannot be converted. "number of degenerate corner !=2"
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Old   July 1, 2012, 08:50
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send files at turboenginner@gmail.com and/or attach to this forum.
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Old   July 1, 2012, 08:59
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I realised that this is not a wedge block. ..it has 8 corners so cannot be converted
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Old   July 1, 2012, 09:00
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merge vertices at trailing edge (i hope you have sharp trailing edge)
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Old   July 1, 2012, 09:11
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Thanks for your video and quick reply here.
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