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Useful article about mesh types

Posted September 23, 2013 at 01:08 by skeptik (CFD notes)

Polyhedral, Tetrahedral, and Hexahedral Mesh Comparison



http://www.symscape.com/polyhedral-t...esh-comparison
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NACA23012 numerical modelling, wing body in tube

Posted September 19, 2013 at 07:42 by skeptik (CFD notes)

Result line fit really good.
And it's much more better than 2D calculations of the same airfoil

Cx, Cy
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Residuals
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2D results
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Old

second order schemes

Posted August 28, 2013 at 10:43 by skeptik (CFD notes)

Quote:
Originally Posted by alberto View Post
Hi,

both limitedLinear and linearUpwind are bounded. What is different is how the boundness of the scheme is obtained (see table 4.10 of User's guide).
  • limitedLinear is the linear scheme stabilized with the introduction of a limiter (Sweby limiter)
  • linearUpwind in an upwinded scheme
About their accuracy, limitedLinear is in my experience slightly less diffusive, but I had good results with both the schemes.

I believe the second order upwind scheme in commercial
...
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A few simple questions about linearUpwind and limitedLinear

Posted August 28, 2013 at 10:36 by skeptik (CFD notes)

Quote:
Originally Posted by chegdan View Post
I am a writing about the schemes that I used in my simulations in my thesis and could use some clarification on the linearUpwind and limitedLinear schemes. I have read http://www.cfd-online.com/Forums/ope...r-schemes.html and Alberto did a good explanation, but I need a little more clarification.

linearUpwind:

I know linearUpwind is second order and bounded by a limiter (e.g. cellMDLimited from http://www.cfd-online.com/Forums/ope...lllimited.html).
...
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Mesh OK!

Posted August 23, 2013 at 03:53 by skeptik (CFD notes)

13e6 elements with SALOME (4 core CPU, 8Gb, Linux)

10e6 - tetra,
3e6 - prism layers.

Meshing time is about 2 hours.

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