Hi,
i have a question regarding the filters "Compute Derivatives" and
"Gradient (Unstructured)". I have to calculate a equation on an
unstructured data set with some derivatives of the velocity.
Using the "Gradient (Unstructured)" it works, but it is really slow.
Using the "Compute Derivatives" and the convert the result back from
cell centers to points i can get nearly the same results - but much
faster (the most time takes the conversion from cell center to points!).
So i made a comparison of both results with an isosurface of the
magnitude of the difference between both gradients an i can only find
minor changes. So my question to the developers: Where is the difference
between both filters? Why is the "Gradient (Unstructured)" so much slower?
Best regards and thank you in advance,
Stefan
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Stefan Melber-Wilkending
_/
_/_/ Fields of activities:
_/ _/ -) High-Lift Research
_/_/_/_/_/_/_/_/_/_/ -) Complex Configurations
_/ _/ _/ _/ -) Numerical Wind-Tunnel
_/ _/ _/ _/ -) Supercomputing
_/_/_/_/_/_/_/_/_/_/ -) Glider-Aerodynamics
_/ _/ _ _
_/_/ | \ | |_| German Aerospace Center, DLR
_/ |_/ |_ | \ in the Helmholtz-Association
Phone ..: +49 531/295-2836 Institute of Aerodynamics
Fax. ...: +49 531/295-2320 and Flow Technology
Email ..: [email protected] Lilienthalplatz 7
Web ....: http://www.dlr.de/AS D-38106 Braunschweig/Germany
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