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Explanation for the constraint/objective function key words

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Old   April 12, 2014, 11:38
Default Explanation for the constraint/objective function key words
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Sreekanth
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Hi,

1. What does the objective functions Nearfield pressure, Equivalent Area, Efficiency.. imply?
2. Also, in the other geometric constraint what does Area imply?
3..How can I impose a constraint on the volume of a shape in 3D or correspondingly area in 2D?
4. How to add a new constraint to the code ?

Sreekanth
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Old   April 13, 2014, 22:26
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Thomas D. Economon
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Dear Sreekanth,

Some answers embedded below...

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Originally Posted by shsreekanth View Post
1. What does the objective functions Nearfield pressure, Equivalent Area, Efficiency.. imply?
Nearfield pressure and Equivalent Area are related to boom noise minimization for supersonic aircraft. Efficiency is L/D.

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2. Also, in the other geometric constraint what does Area imply?
Area in the case of a geometric constraint is the area internal to an airfoil or section cut of a wing.

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Originally Posted by shsreekanth View Post
3..How can I impose a constraint on the volume of a shape in 3D or correspondingly area in 2D?
At the moment, we don't have 3D volume constraints (we are working on this), but the Area option for the constraints will work as described in #2.

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4. How to add a new constraint to the code ?
If you are interested in adding new constraints, the main module is SU2_GDC. Please see the CBoundaryGeometry class in geometry_structure.cpp in order to find the current implementations of the constraints.

Cheers,
Tom
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Old   April 14, 2014, 03:37
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Thank you, I will try to figure out what is given in SU2_GDC.
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Old   April 17, 2014, 06:33
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Quote:
Originally Posted by economon View Post
If you are interested in adding new constraints, the main module is SU2_GDC. Please see the CBoundaryGeometry class in geometry_structure.cpp in order to find the current implementations of the constraints.
Hi,
Could you tell me something more on how its implemented? I am unable to figure out what is being done in the code.
What should I be looking for?
Which are the functions that I should modify/ add ?

Thank you.
Sreekanth
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Old   April 24, 2014, 05:05
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Thomas D. Economon
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Quote:
Originally Posted by shsreekanth View Post
Hi,
What should I be looking for?
Which are the functions that I should modify/ add ?
Sreekanth
You'll want to give the routines such as CBoundaryGeometry::Compute_MaxThickness(), CBoundaryGeometry::Compute_AoA(), CBoundaryGeometry::Compute_Area(), etc. a look. These are where we compute the various geometric quantities that we use as constraints (these are called from main() in SU2_GDC.cpp). It should be straightforward to add more routines like these that can be called from SU2_GDC.cpp in order to compute some new geometric quantities of interest using the boundary geometry.

Hope this helps,
T
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