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Postdoc on Optimization of an Immersed boundary Method (IBM) library for the analysis of wall-bounded turbulent flows (Poitiers, France)

Du 1 août 2022 au 1 avril 2024

17 months position

Contact: david.marx@univ-poitiers.fr

The objective of this postdoc position is to improve the CYCLONE library developed by RTECH, possibly by incorporating a different type of Immersed Boundary Method (IBM), such as the sharp interface method, which is presently under investigation at Pprime Institute.

The present research work aims at improving the analysis of complex flow around bodies at high speed, including configurations such as space vehicles, using numerical simulations. For these flows, the accurate prediction of several aspects such as shock waves, heat transfer, turbulence, and surface deterioration are crucial. The boundary of the objects should also be taken into account in a satisfactory manner. To do so, an immersed boundary method (IBM) over a Cartesian grid has been preferred to a classical body-fitted approach. The latter suffers from several disadvantages, not the least being that the
numerical cost would be prohibitive for a moving object. R.Tech has developed a library called CYCLONE to include bodies within the computational domain by using the IBM forcing method. The objective of this postdoc position is to improve this library, possibly by incorporating a different type of IBM method, such as the sharp interface method, which is presently under investigation at Pprime Institute. This should lead to an increase of the order of accuracy of the CYCLONE library.
Objectives: the work of the candidate will aim for the development of three synergic tasks, which are listed in the following:
1. Implementation of an interface between the library CYCLONE and an in-house code at Pprime Institute [5].
2. Development of several physical models within the library, which aim to improve the accuracy of the IBM method.
3. Validation of the models developed with application to test cases, such as a heated cylinder.