Fluid-structure interaction simulations: Efficient higher order time integration of partitioned systems

Fluid-structure interaction simulations: Efficient higher order time integration of partitioned systems

van Zuijlen, A.H.

Bijl, H. (promotor)
Bakker, P.G. (promotor)

Aerospace Engineering

2006-11-22

The simulation of fluid-structure interaction can be a very time-consuming task due to the large amount of time steps that need to be taken in order to obtain an accurate solution. To reduce computing times a higher order time integration algorithm is applied. Based on a mixed combination of implicit and explicit multistage Runge-Kutta schemes, the proposed algorithm integrates partitioned systems with higher order accuracy in time even without the need for sub-iterations. The method outperforms current first and second order schemes. For physically strongly coupled interactions, sub-iterations are mandatory. The computing time of sub-iterations can be greatly reduced using a two-level approach in which the sub-iterations are performed on a coarse grid. This algorithm can be used to make a coarse grid prediction before solving the partitioned system on the fine grid or to make a coarse grid correction after solving the partitioned system on the fine grid. Of these methods coarse grid prediction reduces the computational time the most.

fluid-structure interaction
partitioned integration
higher order time integration
two-level algorithm

http://resolver.tudelft.nl/uuid:fd466357-7890-45bd-b199-3df64df2e6d7

90-8559-254-2

Institutional Repository

doctoral thesis

(c) 2006 A.H. van Zuijlen