%0 Conference Paper %1 vonscheven2007efficiency %A von Scheven, Malte %A Tiyyagura, S.R. %A Ramm, Ekkehard %A Bischoff, Manfred %B Extended Abstract in Proc. of International Conf. on Computational Methods for Coupled Problems in Science and Engineering, Santa Eulalia, Ibiza, Spain, Mai 21-23 %D 2007 %K ibb from:maltevonscheven inproceedings %T Efficiency Issues of Partitioned Solution in Fluid-Structure Interaction %X Numerical simulation of large scale computational fluid dynamics (CFD) and fluid-structure interaction (FSI) problems is still today a very challenging task. The correct modeling of fluid flow, governed by the instationary incompressible Navier-Stokes equations, and the nonlinear structural behavior are challenges of their own. In addition coupling of both physical fields introduces further requirements on stability and efficiency of the involved algorithms. For this class of problems computing time is still a limiting factor for size and complexity of the problem. Especially for FSI simulations the necessary iterative coupling schemes dramatically increase the required computing time. Here, the use of advanced coupling strategies, reducing either the time needed for one iteration or the number of iterations, can considerably speed up the simulation. We will introduce a class of coupling schemes enhanced by a coarse grid solution to reduce calculation time and accelerate convergence. In addition, the single fields – especially the fluid – demand high efficiency of the solution algorithm. Here, assembly of the element matrices and in particular the iterative solver for the global system of linear equations are the most time consuming parts of the computational process. Very often these algorithms only use a small fraction of the available computer power in scientific codes. Therefore it is highly advisable to take a closer look at the efficiency of algorithms and improve them to make the best out of the available computer power. We will present approaches to significantly increase efficiency in the assembly and solution part of a finite element code. Here, the special features of vector super computers will be exploited.

@inproceedings{vonscheven2007efficiency, abstract = {Numerical simulation of large scale computational fluid dynamics (CFD) and fluid-structure interaction (FSI) problems is still today a very challenging task. The correct modeling of fluid flow, governed by the instationary incompressible Navier-Stokes equations, and the nonlinear structural behavior are challenges of their own. In addition coupling of both physical fields introduces further requirements on stability and efficiency of the involved algorithms. For this class of problems computing time is still a limiting factor for size and complexity of the problem. Especially for FSI simulations the necessary iterative coupling schemes dramatically increase the required computing time. Here, the use of advanced coupling strategies, reducing either the time needed for one iteration or the number of iterations, can considerably speed up the simulation. We will introduce a class of coupling schemes enhanced by a coarse grid solution to reduce calculation time and accelerate convergence. In addition, the single fields – especially the fluid – demand high efficiency of the solution algorithm. Here, assembly of the element matrices and in particular the iterative solver for the global system of linear equations are the most time consuming parts of the computational process. Very often these algorithms only use a small fraction of the available computer power in scientific codes. Therefore it is highly advisable to take a closer look at the efficiency of algorithms and improve them to make the best out of the available computer power. We will present approaches to significantly increase efficiency in the assembly and solution part of a finite element code. Here, the special features of vector super computers will be exploited.}, added-at = {2021-03-09T13:40:57.000+0100}, author = {{von Scheven}, Malte and Tiyyagura, S.R. and Ramm, Ekkehard and Bischoff, Manfred}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/231fda0a2916af29ec1ea535cdeb676d2/ibb-publication}, booktitle = {Extended Abstract in Proc. of International Conf. on Computational Methods for Coupled Problems in Science and Engineering, Santa Eulalia, Ibiza, Spain, Mai 21-23}, interhash = {e9b29a022029cc391419f13c6f386ad3}, intrahash = {31fda0a2916af29ec1ea535cdeb676d2}, keywords = {ibb from:maltevonscheven inproceedings}, timestamp = {2021-03-09T12:40:57.000+0100}, title = {Efficiency Issues of Partitioned Solution in Fluid-Structure Interaction}, year = 2007 }