Marcel Sauer, DLR Cologne, Institute AT

Title:
Development of an optimization based automatic block structured grid generation method

Abstract:

In the development in turbomachinery components, flow simulations evaluate the design based on a discrete representation: the grid. The complexity of a turbomachinery blade passage allows for the usage of block-structured grids and their numerical advantages.In this talk, a new method for generating block-structured grids is presented. The method is capable of creating high quality grids by only using a small parameter set of block dimensions and distance prescriptions. The grid generation is formulated as an optimization problem, whose complexity is limited by the usage of a B-Spline based reduced grid description. Within a multi-stage process, the reduced grid description is optimized and a final grid is generated. The method is applied to turbomachinery testcases. Additionally, the method is compared to an algebraic grid generation method in the context of a process chain, which is similar to a design optimization.