Partitioned analysis of coupled mechanical systems

Felippa, Carlos A.; Park, K. C.; Farhat, Charbel

doi:10.1016/s0045-7825(00)00391-1

Cited by 581 publications

(231 citation statements)

References 37 publications

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“…5.2. The fluid-structure interaction was solved in a sequentially staggered manner [66], such that velocity and pressure data were passed from the fluid model after each time-step in order to derive plant motion and then new plant position data were fed back into the fluid model for the next time-step. The drag force provided the coupling between the flow and plant models, while other fluid forces where not considered for simplicity.…”

Section: Numerical Solvermentioning

confidence: 99%

Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling

et al. 2016

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Vegetation is a characteristic feature of shallow aquatic flows such as rivers, lakes and coastal waters. Flow through and above aquatic vegetation canopies is commonly described using a canopy mixing layer analogy which provides a canonical framework for assessing key hydraulic characteristics such as velocity profiles, large-scale coherent turbulent structures and mixing and transport processes for solutes and sediments. This theory is well developed for the case of semi-rigid terrestrial vegetation and has more recently been applied to the case of aquatic vegetation. However, aquatic vegetation often displays key differences in morphology and biomechanics to terrestrial vegetation due to the different environment it inhabits. Here we investigate the effect of plant morphology and biomechanical properties on flow-vegetation interactions through the application of a coupled LES-biomechanical model. We present results from two simulations of aquatic vegetated flows: one assuming a semi-rigid canopy and the other a highly flexible canopy and provide a comparison of the associated flow regimes. Our results show that while both cases display canopy mixing layers, there are also clear differences in the shear layer characteristics and turbulent processes between the two, suggesting that the semi-rigid approximation may not provide a complete representation of flow-vegetation interactions.

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Section: Numerical Solvermentioning

confidence: 99%

Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling

et al. 2016

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“…The time evolution of the system is followed by means of a staggered procedure [53]. Thus, after executing a diffusion step, the hydrogen concentration is interpolated from the nodal values of the grain-boundary diffusion elements to the quadrature points of the cohesive elements.…”

Section: Philosophical Magazine 2951mentioning

confidence: 99%

A three-dimensional multiscale model of intergranular hydrogen-assisted cracking

Rimoli

Ortiz

2010

Philosophical Magazine

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“…In short, F represents the coupled system of equations and X represents all nodal solution variables of the coupled system. The non-linear system of equations can be solved either directly as one set or iteratively by partitioning [16,27,28]. In the 'directly fully coupled solution' using, for example, the Newton-Raphson method, the linearization of the equations at each iteration gives…”

Section: Displacement Compatibilitymentioning

confidence: 99%

Finite element developments for general fluid flows with structural interactions

Bathe

Hou²

2004

Numerical Meth Engineering

227

182

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SUMMARYThe objective in this paper is to present some developments for the analysis of Navier-Stokes incompressible and compressible fluid flows with structural interactions. The incompressible fluid is discretized with a new solution approach, a flow-condition-based interpolation finite element scheme. The high-speed compressible fluids are solved using standard finite volume methods. The fluids are fully coupled to general structures that can undergo highly non-linear response due to large deformations, inelasticity, contact and temperature. Particular focus is given on the scheme used to couple the fluid media with the structures. The fluids can also be modelled as low-speed compressible or slightly compressible media, which are important models in engineering practice. Some solutions obtained using ADINA are presented to indicate the analyses that can be performed.

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Partitioned analysis of coupled mechanical systems

Cited by 581 publications

References 37 publications

Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling

Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling

A three-dimensional multiscale model of intergranular hydrogen-assisted cracking

Finite element developments for general fluid flows with structural interactions

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