By Donald A. Drew (auth.), Professor Wolfgang Wendland, Professor Messoud Efendiev (eds.)

The research and simulation of multifield difficulties have lately turn into essentially the most real and bright parts of analysis. even supposing the person subproblems of complicated technical and actual phenomena usually are understood individually, their interplay and coupling create not just new problems but additionally a whole new point and caliber of interacting coupled box difficulties. offered by way of top specialists this booklet comprises fresh leads to those fields from the foreign convention on Multifield difficulties, April 8-10, 2002 on the college of Stuttgart, Germany.

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For some arbitrary vector s we want [D(F 1 ls , and with an appropriate small step h we have (51) This uses the iterative solver F 1 for the first subsystem once. 3 Solution of the Schur-Complement System Now we can look at step 2. It involves two sub-steps: Computation of the vector r in (45a,47) and solution of the Schur-complement system (44). 2, but in a reversed way. From (47), we have analogously to (51): (52) This uses the iterative solver F2 for the second subsystem once. -------,-----r------,------,,------, I I as ~ ~ J" a '" ..

Eng. 32, 3-57 13. Zienkiewicz O. , Paul D. K, Chan A. H. C. (1988) Unconditionally stable staggered solution procedure for soil-pore fluid interaction problems. Int. J. Num. Meth. Eng. 26, 1039-1055 14. , Felippa C. A. (1983) Partitioned analysis of coupled systems. , Hughes T. J. R. ) Computational Methods in Transient Analysis. North-Holland, Amsterdam 34 Hermann G. Matthies, Jan Steindorf 15. , FeJippa C. A. (1984) Recent developments in coupled field analysis methods. In: Lewis R. , Hinton E.

Again this is a coupled system of equations, but we may only have solvers for each subsystem separately. 3 Fluid-Structure Interaction Before describing in the abstract setting of the preceeding section 2 how to solve these systems numerically by using the subsystem solvers, we shall take a glance at the FSI problem, and how to formulate it such that it fits the above setting. 1 The Fluid We assume the fluid to be modeled adequately as an incompressible Newtonian fluid, satisfying the appropriate Navier-Stokes equation.

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