Convergence acceleration for partitioned simulations of the fluid-structure interaction in arteries

Radtke, Lars; Larena‐Avellaneda, Axel; Debus, Eike Sebastian; Düster, Alexander

doi:10.1007/s00466-016-1268-0

Cited by 23 publications

(29 citation statements)

References 57 publications

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“…1, the parallel coupling algorithm in combination with the original QNLS method yields the lowest number of iterations. The variant FQNLSMTR, in which data from previous time steps is reused and where the filtering according to [4] and resetting according to [5] are applied, unexpectedly does not yield a performance gain. While this behavior was not observed in preliminary investigations [8], the fact that the Aitken relaxation-like method does not yield stable simulations in combination with the parallel coupling algorithms (marked as failed in Fig.…”

Section: Partitioned Couplingmentioning

confidence: 98%

“…A parallel coupling algorithm can be based on the FPI Regarding the convergence acceleration method, various choices are possible. We have found that the quasi-Newton least squares (QNLS) method from [3] with the enhancements introduced in [4] and [5] yields the lowest number of coupling iterations for both coupling algorithms. However, less complex methods such as the Aitken relaxation-like approach used for fixed-point FSI simulations in [6] are reasonable alternatives in view of a lower implementation effort.…”

Section: Partitioned Couplingmentioning

confidence: 99%

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Partitioned simulation of multi‐field problems – efficient and robust coupling of fluids and structures

Radtke

Lampe

Abdel‐Maksoud

et al. 2018

Proc Appl Math and Mech

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Strongly coupled multifield problems arise in various engineering applications. Fluid-structure interaction problems are one of the most prominent examples, especially in maritime applications. Choosing a partitioned solution approach allows to reuse existing software that was specialized to solve the underlying structural and fluid dynamics subproblems. In this work, the general partitioned solution approach is applied to investigate the hydrodynamics around an elastic marine-propeller. The software library comana is used to steer the solution process. It allows to couple a boundary element solver for the fluid subproblem with a finite element solver for the structural subproblem. It is shown that novel convergence acceleration methods ensure a stable and efficient simulation for different coupling algorithms.

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Section: Partitioned Couplingmentioning

confidence: 98%

Section: Partitioned Couplingmentioning

confidence: 99%

Partitioned simulation of multi‐field problems – efficient and robust coupling of fluids and structures

Radtke

Lampe

Abdel‐Maksoud

et al. 2018

Proc Appl Math and Mech

Self Cite

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show abstract

“…Aitken's underrelaxation constants are adjusted dynamically based on the acceleration of the rigid body, thus improving stability. This type of simulations with deformable grids, applied to fluidstructure interaction using OpenFOAM solvers have been tested in the past with complex problems, such as drag reduction [38], flow and deformation in arteries [39], bluff body oscillations [40], or offshore floating platforms [41]).…”

Section: Numerical Simulationsmentioning

confidence: 99%

Numerical Study of an Oscillating-Wing Wingmill for Ocean Current Energy Harvesting: Fluid-Solid-Body Interaction with Feedback Control

Balam-Tamayo

Málaga

Figueroa-Espinoza

2020

JMSE

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The performance and flow around an oscillating foil device for current energy extraction (a wingmill) was studied through numerical simulations. OpenFOAM was used in order to study the two-dimensional (2D) flow around a wingmill. A closed loop control law was coded in order to follow a reference angle of attack. The objective of this control law is to modify the angle of attack in order to enhance the lift force (and increase power extraction). Dimensional analysis suggests a compromise between the generator (or damper) stiffness and actuator/control gains, so a parametric study was carried out while using a new dimensionless number, called B, which represents this compromise. It was found that there is a maximum on the efficiency curve in terms of the aforementioned dimensionless parameter. The lessons that are learned from this fluid-structure and feedback coupling are discussed; this interaction, combined with the feedback dynamics, may trigger dynamic stall, thus decreasing the performance. Moreover, if the control strategy is not carefully selected, then the energy spent on the actuator may affect efficiency considerably. This type of simulation could allow for the system identification, control synthesis, and optimization of energy harvesting devices in future studies.

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“…j+1,k using a suitable convergence acceleration scheme. In our experience, the quasi-Newton least-squares method proposed in Degroote et al (2009) or Radtke et al (2016) has proven effective for different kinds of strongly coupled multi-field problems. In this scheme, the displacement increment u h n,1 j+1,k is determined by minimising the updated residual…”

Section: Partitioned Solution Approachmentioning

confidence: 99%

Numerical investigation of the landing manoeuvre of a crew transfer vessel to an offshore wind turbine

König

González

Abdel‐Maksoud

et al. 2017

Ships and Offshore Structures

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Crew transfer vessels are a fast and cost-effective means of transportation to bring service personnel and technical equipment to an offshore wind turbine. The landing manoeuvre of such service vessels is a complex coupled process involving the ship's motion in the seaway and the frictional contact between the fender and the boat landing. With the help of numerical simulations, we aim to identify the limit conditions under which a safe crew transfer can still be ensured, and to investigate innovative transfer concepts which serve to avoid severe accidents. In our research, we draw on a partitioned solution strategy which has already been successfully applied to other sophisticated multi-field phenomena and which allows to reuse specialised existing solvers for the solution of the involved subproblems.

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Convergence acceleration for partitioned simulations of the fluid-structure interaction in arteries

Cited by 23 publications

References 57 publications

Partitioned simulation of multi‐field problems – efficient and robust coupling of fluids and structures

Partitioned simulation of multi‐field problems – efficient and robust coupling of fluids and structures

Numerical Study of an Oscillating-Wing Wingmill for Ocean Current Energy Harvesting: Fluid-Solid-Body Interaction with Feedback Control

Numerical investigation of the landing manoeuvre of a crew transfer vessel to an offshore wind turbine

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