Scientific Computing Seminar

Date and Place: Thursdays and hybrid (live in 32-349/online via Zoom). For detailed dates see below!

Content

In the Scientific Computing Seminar we host talks of guests and members of the SciComp team as well as students of mathematics, computer science and engineering. Everybody interested in the topics is welcome.

List of Talks

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.rptu.de//SciCompSeminar_02. Please follow the rules below:

    • Use a chrome based browser (One member with a different browser can crash the whole meeting).
    • Mute your microphone and disable your camera.
    • If you have a question, raise your hand.

    More information is available at https://rz.rptu.de/dienstleistungen/netz-telefonie/konferenzdienste/jitsi/.