2016

Prof. Ralf Deiterding, Aerodynamics and Flight Mechanics Research Group University of Southampton

Nov. 8th 2016, 3:30 pm

Adaptive Cartesian CFD methods for fluid-structure interaction simulation

Cartesian CFD methods automate the mesh generation process and are well suited for providing dynamic multi-resolution refinement. We use level sets for representing possibly moving solid structures on the adapting Cartesian grid. On-the-fly coupling between CFD solvers and computational solid dynamics solvers for large deformations and six degree of freedom rigid body dynamics is available. While our Cartesian fluid solver framework AMROC was originally developed for shock-capturing schemes of compressible flows, the software has recently been extended to lattice Boltzmann methods, which are designed primarily for the weakly compressible regime. The presentation will give an overview of the generic construction principles of AMROC and summarise some of the employed specialised numerical methods. Considered applications include supersonic combustion phenomena in hydrogen-air mixtures and low-Mach number flows around moving geometry, e.g., full-scale wind turbine aerodynamics. The results confirm the importance of Cartesian methods as an enabler for large-scale, parallel CFD simulation at all flow velocities.