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SU2 Discrete Adjoint Error!!!!

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Old   September 12, 2019, 18:13
Default SU2 Discrete Adjoint Error!!!!
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Vishal Chauhan
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Hello All,


I am trying to verify sensitivity of Discrete Adjoint against Finite differences for tutorial case ONERAM6 (SU2 version 6.2.0).


I have plotted dCd/dX (Change of drag coefficient against change in one coordinate of FFD box like delx = 0.001).




In this case, what I see is that at trailing edge of the wing, values differ significantly compared to Finite difference and in other words, Discrete Adjoint seems to be matching with Continuous Adjoint and there is no clear benefit of using Discrete Adjoint in this case.



Would anybody shed some light on such issue or anybody might have experienced something like this!


Thanks a lot!
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Old   Today, 06:22
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pcg
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Pedro Gomes
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Are you using the sharp corner filter option?
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Old   Today, 07:50
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Vishal Chauhan
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Hi, Thanks for your reply.

No, I am not aware of it (sharp corner filter option). What is that actually! Does it affect discrete adjoint sensitivity.

Thanks.
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