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Forum: Main CFD Forum

December 23, 2016, 20:11

Replies: 19

aerofoil problem

Views: 48,748

Posted By truffaldino

Formally, your approach is correct (one should...

Formally, your approach is correct (one should use free stream turbulence level), but there is a big problem.

The turbulence level at which linear (e^N) theory ceases to be valid is about 1%.
...

Forum: Main CFD Forum

November 19, 2013, 12:14

Replies: 19

aerofoil problem

Views: 48,748

Posted By truffaldino

Fluent does not use Ncrit as it uses turbulence...

Fluent does not use Ncrit as it uses turbulence models. Ncrit is used in boundary layer methods as in x-foil which is based on different and, in this case, more reliable (than fluent models)...

Forum: Main CFD Forum

July 10, 2013, 09:16

Replies: 19

aerofoil problem

Views: 48,748

Posted By truffaldino

Ncrit is critical number in e^N theory (the...

Ncrit is critical number in e^N theory (the disturbance in linearized bl equations grows e^N times before passing to turbulence). Read x-foil manual:

situation Ncrit ...

Forum: Main CFD Forum

July 10, 2013, 08:37

Replies: 19

aerofoil problem

Views: 48,748

Posted By truffaldino

BTW, xfoil is more reliable than fluent for such...

BTW, xfoil is more reliable than fluent for such reynolds numbers

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