A plug-and-play coupling approach for parallel multi-field simulations

Abstract

For multi-field simulations involving a larger number of different physical fields and in cases where the involved fields or simulation codes change due to new modelling insights, e.g., flexible and robust partitioned coupling schemes are an important prerequisite to keep timeto-solution within reasonable limits. They allow for a fast, almost plug-and-play combination of existing established codes to the respective multi-field simulation environment. In this paper, we study a class of coupling approaches that we originally introduced in order to improve the parallel scalability of partitioned simulations. Due to the symmetric structure of these coupling methods and the use of 'long' vectors of coupling data comprising the input and output of all involved codes at a time, they turn out to be particularly suited also for simulations involving more than two coupled fields. As standard two-field coupling schemes are not suited for such cases as shown in our numerical results, this allows the simulation of a new range of applications in a partitioned way.

Improving the performance of the partitioned QN-ILS procedure for fluid–structure interaction problems: Filtering

“…This method is sometimes called Interface QuasiNewton Inverse Least Squares to emphasize the use of interface variables, even though this does not change the method itself [15,26,66,85].…”

“…If solved by a pure fixed-point iteration, the vectorial system results in two independent instances of the S-System. Quasi-Newton solvers turn out to be powerful enough that one iteration of the V-System is comparable to one iteration of the S-System [15,85].…”

Partitioned simulation strategies for fluid–structure–control interaction problems by Gauss–Seidel formulations

“…The disturbance force on the right hand side z(t) has to be split up into z F (t) and z S (t), since Eqs. (17) and (18), which are the partitioned equations, need a disturbance force each. In combination with Eqs.…”

“…The temporal discretization of the partitioned simplified model problem Eqs. (17), (18), (19), (20) and (21), with the BDF1 scheme leads to the discrete, partitioned, simplified model problem. It consists of the discrete fluid Eq.…”

Parallel block‐preconditioned monolithic solvers for fluid‐structure interaction problems

“…The traditional approach to the solution of FSI problems makes use of available fluid and solid solvers in an alternate iteration between fluid and solid and an information exchange across the interface via the interface conditions. This class of solvers is called partitioned solvers , see, eg, other works and the references therein for recent developments of partitioned methods. Beside the advantage of using available solvers, often provided by different codes, there are several disadvantages of partitioned solvers.…”