An immersed-shell method for modelling fluid–structure interactions

Viré, Axelle; Xiang, Jiansheng; Pain, Christopher C.

doi:10.1098/rsta.2014.0085

Cited by 17 publications

(38 citation statements)

References 33 publications

(63 reference statements)

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“…The method was firstly presented in the work of [50]. In this approach, a thin shell mesh surrounding the solid mesh is introduced, and a coupling source term is used to calculate the exchange forces between the fluid and solid on the shell mesh.…”

Section: Coupling Methods Between the Fluid Model (Fluidity) And Solimentioning

confidence: 99%

“…∆r is the thickness of the shell, which is an intermediate thin area between the fluid and solid, and is introduced for calculating the impact of the solid on the fluid [50].…”

Section: Coupling Source Termmentioning

confidence: 99%

“…where ∆t is the time step size andû f is the bulk velocity ( [50] which is then used in the coupled system. The coupling process is achieved by introducing a source term s c into the momentum equation (3), which represents the effects of forces of the solid on the fluid.…”

Section: Coupling Equationsmentioning

confidence: 99%

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A non-intrusive reduced-order model for compressible fluid and fractured solid coupling and its application to blasting

Xiao¹,

Yang²,

Fang

et al. 2017

Journal of Computational Physics

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This work presents the first application of a non-intrusive reduced order method to model solid interacting with compressible fluid flows to simulate crack initiation and propagation. In the high fidelity model, the coupling process is achieved by introducing a source term into the momentum equation, which represents the effects of forces of the solid on the fluid. A combined single and smeared crack model with the MohrCoulomb failure criterion is used to simulate crack initiation and propagation. The non-intrusive reduced order method is then applied to compressible fluid and fractured solid coupled modelling where the computational cost involved in the full high fidelity simulation is high. The non-intrusive reduced order model (NIROM) developed here is constructed through proper orthogonal decomposition (POD) and a radial basis function (RBF) multi-dimensional interpolation method.The performance of the NIROM for solid interacting with compressible fluid flows, in the presence of fracture models, is illustrated by two complex test cases: an immersed wall in a fluid and a blasting test case. The numerical simulation results show that the NIROM is capable of capturing the details of compressible fluids and fractured solids while the CPU time is reduced by several orders of magnitude. In addition, the issue of whether or not to subtract the mean from the snapshots before applying POD is discussed in this paper. It is shown that solutions of the NIROM, without mean subtracted before constructing the POD basis, captured more details than the NIROM with mean subtracted from snapshots.

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Section: Coupling Methods Between the Fluid Model (Fluidity) And Solimentioning

confidence: 99%

“…∆r is the thickness of the shell, which is an intermediate thin area between the fluid and solid, and is introduced for calculating the impact of the solid on the fluid [50].…”

Section: Coupling Source Termmentioning

confidence: 99%

See 1 more Smart Citation

A non-intrusive reduced-order model for compressible fluid and fractured solid coupling and its application to blasting

Xiao¹,

Yang²,

Fang

et al. 2017

Journal of Computational Physics

Self Cite

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show abstract

“…Challenges and innovative solutions are discussed in three papers of the theme issue: the papers by Sorensen et al [37] and Xu et al [38], which present respectively a CFD method and a free-vortex wake method for aerodynamics, and [39], which proposes an integrated CFD approach to aerodynamics and hydrodynamics.…”

Section: Aerodynamics and Hydrodynamicsmentioning

confidence: 99%

“…Within the context of CFD methods, Viré et al [39] propose an innovative method modelling aerodynamic and hydrodynamic fluid-structure interactions on a computational mesh covering fluids (sea water and air) and structures (support structures, rotor blades). In particular, the Navier-Stokes equations are defined over an extended fluid mesh covering fluids and structures, while the effects of the structures on the fluid flows are represented using a thin shell surrounding the structures, which relaxes fluid velocity and structural velocity to one another.…”

Section: Aerodynamics and Hydrodynamicsmentioning

confidence: 99%

New perspectives in offshore wind energy

Failla

Arena

2015

Phil. Trans. R. Soc. A.

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The design of offshore wind turbines is one of the most fascinating challenges in renewable energy. Meeting the objective of increasing power production with reduced installation and maintenance costs requires a multi-disciplinary approach, bringing together expertise in different fields of engineering. The purpose of this theme issue is to offer a broad perspective on some crucial aspects of offshore wind turbines design, discussing the state of the art and presenting recent theoretical and experimental studies.

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Implementation of an Empirical Joint Constitutive Model into Finite-Discrete Element Analysis of the Geomechanical Behaviour of Fractured Rocks

2016

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An empirical joint constitutive model (JCM) that captures the rough wall interaction behaviour of individual fractures associated with roughness characteristics observed in laboratory experiments is combined with the solid mechanical model of the finite-discrete element method (FEMDEM). The combined JCM-FEMDEM formulation gives realistic fracture behaviour with respect to shear strength, normal closure, and shear dilatancy and includes the recognition of fracture length influence as seen in experiments. The validity of the numerical model is demonstrated by a comparison with the experimentally established empirical solutions. A 2D plane strain geomechanical simulation is conducted using an outcrop-based naturally fractured rock model with far-field stresses loaded in two consecutive phases, i.e. take-up of isotropic stresses and imposition of two deviatoric stress conditions. The modelled behaviour of natural fractures in response to various stress conditions illustrates a range of realistic behaviour including closure, opening, shearing, dilatancy, and new crack propagation. With the increase in stress ratio, significant deformation enhancement occurs in the vicinity of fracture tips, intersections, and bends, where large apertures can be generated. The JCM-FEMDEM model is also compared with conventional approaches that neglect the scale dependency of joint properties or the roughness-induced additional frictional resistance. The results of this paper have important implications for understanding the geomechanical behaviour of fractured rocks in various engineering activities.

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An immersed-shell method for modelling fluid–structure interactions

Cited by 17 publications

References 33 publications

A non-intrusive reduced-order model for compressible fluid and fractured solid coupling and its application to blasting

A non-intrusive reduced-order model for compressible fluid and fractured solid coupling and its application to blasting

New perspectives in offshore wind energy

Implementation of an Empirical Joint Constitutive Model into Finite-Discrete Element Analysis of the Geomechanical Behaviour of Fractured Rocks

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