Abstract
Fluidstructure interaction simulations are crucial for many engineering problems. For example, the blood flow around new heart valves or the deployment of airbags during a car crash are often modeled with fluidstructure interaction simulations. Also, to design safe parachutes, simulations are carried out to model the unsteady deformations of the parachute during a jump. Thus, there is an apparent need for multiphysics software codes which can model fluidstructure interaction problems.
However, current stateoftheart solvers cannot be used for design or optimization studies of for example aircraft structures due to long simulation times. This is mainly caused by a large number of coupling iterations needed to reach convergence within each time step for a strongly coupled fluidstructure interaction simulation. Also, a large number of time steps are required to reach an acceptable accuracy in time for unsteady simulations. Hence, there is an urgency for efficiency improvements of fluidstructure interaction solvers.
In this thesis, two approaches are investigated to decrease the computational times for a fluidstructure interaction simulation: multilevel acceleration of the coupled problem, and the use of higher order time integration schemes.
However, current stateoftheart solvers cannot be used for design or optimization studies of for example aircraft structures due to long simulation times. This is mainly caused by a large number of coupling iterations needed to reach convergence within each time step for a strongly coupled fluidstructure interaction simulation. Also, a large number of time steps are required to reach an acceptable accuracy in time for unsteady simulations. Hence, there is an urgency for efficiency improvements of fluidstructure interaction solvers.
In this thesis, two approaches are investigated to decrease the computational times for a fluidstructure interaction simulation: multilevel acceleration of the coupled problem, and the use of higher order time integration schemes.
Original language  English 

Awarding Institution 

Supervisors/Advisors 

Award date  27 Mar 2017 
DOIs  
Publication status  Published  2017 
Keywords
 fluidstructure interaction
 manifold mapping
 strongly coupled
 spectral deferred correction
 higher order time integration