Event Information:

• Thu

  14

  May

  2020

  SC Seminar: Steffen Schotthöfer

  11:30online

  Steffen Schotthöfer, Institute for Applied and Numerical Mathematics, Karlsruher Institut für Technologie

  Title:
  Windowing Regularization Techniques for Unsteady Aerodynamic Shape Optimization

  Abstract:

  Unsteady Aerodynamic Shape Optimization presents new challenges in terms of sensitivity analysis of time-dependent objective functions. In this work, we consider periodic unsteady flows governed by the URANS equations. Hence, the resulting output functions acting as objective or constraint functions of the optimization are themselves periodic with unknown period length, that may depend on the design parameter of said optimization. Sensitivity Analysis on the time-average of a function with these properties turns out to be difficult. Therefore, we explore methods to regularize the time average of such a function with the so called windowing-approach. Furthermore, we embed these regularizers into the discrete adjoint solver for the URANS equations of the multi-physics and optimization software SU2. Finally, we exhibit a comparison study between the classical non regularized optimization procedure and the ones enhanced with regularizers of different smoothness and show that the latter result in a more robust optimization.

  How to join

  The talk is held online via Jitsi. You can join with the link https://jitsi.uni-kl.de/SciCompSeminar_02. Please follow the rules below:

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  • If you have a question, raise your hand.

  More information is available at https://www.rhrk.uni-kl.de/dienstleistungen/netz-telefonie/konferenzdienste/jitsi/.