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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

Residuals

2D results
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## second order schemes

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

Quote:
Originally Posted by alberto
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
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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