TY - GEN
T1 - Partitioned solution of the unsteady adjoint equations for a strongly coupled fluid-structure interaction problem
AU - Degroote, Joris
AU - Hojjat, Majid
AU - Stavropoulou, Electra
AU - Wüchner, Roland
AU - Bletzinger, Kai Uwe
PY - 2012
Y1 - 2012
N2 - Unsteady fluid-structure interaction (FSI) simulations are often time-consuming. As a result, the number of simulations has to be limited in optimisation studies and therefore gradient-based optimisation methods are generally preferred. When the number of optimisation parameters is high, the adjoint equations of the unsteady FSI problem need to be solved to obtain the required gradient at a cost (almost) independent of the number of parameters. In this work, a framework is presented to solve both the forward and the adjoint problem in a partitioned way, which means that the flow equations and the structural equations are solved separately. As an illustration, a one-dimensional example is solved, namely the flow of an incompressible fluid in a straight elastic tube. Due to the strong interaction between the fluid and the structure, quasi-Newton coupling iterations are applied to stabilise the partitioned solution of both the forward and the adjoint problem.
AB - Unsteady fluid-structure interaction (FSI) simulations are often time-consuming. As a result, the number of simulations has to be limited in optimisation studies and therefore gradient-based optimisation methods are generally preferred. When the number of optimisation parameters is high, the adjoint equations of the unsteady FSI problem need to be solved to obtain the required gradient at a cost (almost) independent of the number of parameters. In this work, a framework is presented to solve both the forward and the adjoint problem in a partitioned way, which means that the flow equations and the structural equations are solved separately. As an illustration, a one-dimensional example is solved, namely the flow of an incompressible fluid in a straight elastic tube. Due to the strong interaction between the fluid and the structure, quasi-Newton coupling iterations are applied to stabilise the partitioned solution of both the forward and the adjoint problem.
KW - Adjoint
KW - Fluid-structure interaction
KW - Gradient
KW - Partitioned
KW - Quasi-Newton
UR - http://www.scopus.com/inward/record.url?scp=84871638932&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84871638932
SN - 9783950353709
T3 - ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
SP - 1858
EP - 1875
BT - ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
T2 - 6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012
Y2 - 10 September 2012 through 14 September 2012
ER -