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Forum: FLUENT

May 14, 2013, 21:18

Replies: 7

NACA 0012 validation Drag problems

Views: 2,162

Posted By blackmask

The lift & drag is in regard to the free stream...

The lift & drag is in regard to the free stream flow. It is just a simple coordinate transformation. The drag in most of the sketches is in parallel with x-direction is because in aviation the flow...

Forum: FLUENT

May 13, 2013, 23:27

Replies: 7

NACA 0012 validation Drag problems

Views: 2,162

Posted By blackmask

Thank you for posting the values of your cl&cd...

Thank you for posting the values of your cl&cd direction vectors. The components are incorrect. The correct value should be
cd:< cos(alpha), sin(alpha), 0 >
cl: <-sin(alpha), cos(alpha), 0>

I...

Forum: FLUENT

May 13, 2013, 20:00

Replies: 7

NACA 0012 validation Drag problems

Views: 2,162

Posted By blackmask

Generally use k-w models for outer flow. Did you...

Generally use k-w models for outer flow. Did you forget to set the direction vector for cl & cd according to the AoA?

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