Fast high fidelity CFD/CSM fluid structure interaction using RBF mesh morphing and modal superposition method

Groth, Corrado; Cella, Ubaldo; Costa, Emiliano; Biancolini, Marco Evangelos

doi:10.1108/aeat-09-2018-0246

Cited by 27 publications

(10 citation statements)

References 27 publications

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“…Some other works have imported fluid and solid solutions to the same software (although still using different discretizing methods) and realized a weakly two-way coupling of FSI, for example, Di Domenico et al (2018) and Groth et al (2019). In weakly two-way coupling, per time step, the fluid solution is first passed to the solid part to induce the solid deformation, and then the solid deformation is used to update fluid mesh; however, the velocity and pressure of the fluid field are not further solved based on the updated fluid mesh.…”

Section: Used the Eigenfunction Expansion Methods Tomentioning

confidence: 99%

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Huang

2021

Computer aided Civil Eng

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This work provides a novel approach that combines computational fluid dynamics (CFD) with computational solid mechanics (CSM) to dynamically simulate the fully coupled hydroelastic interaction between nonlinear ocean waves and a submerged horizontal plate breakwater (SHPB). Based on a systematic series of simulations, it is shown that the wave damping performance of an SHPB can be evidently improved by an appropriate extent of deformation, which can be achieved through the design of its bending stiffness by varying elasticity and/or aspect ratio. The wave attenuation effect is found to be maximized when an SHPB has a deformation amplitude close to the incident wave amplitude. By accounting for the hydroelastic effect through the fully coupled CFD+CSM approach, this work presents a new computational technique that supports the design of deformable offshore and coastal structures.

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Section: Used the Eigenfunction Expansion Methods Tomentioning

confidence: 99%

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Huang

2021

Computer aided Civil Eng

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“…Taking into account the results obtained from the Structural-CFD analysis for the baseline geometrical configuration of flexible components, the changes in shape and size were applied to the geometry of the flexible components according to the geometrical specifications and tolerances. The RBF solutions related to these changes were generated using the 'Surfs' and 'Encap' features of RBF Morph ™ [30]. In particular, for each shape modification a set of surfaces "Surfs" was used to fix the nodes that are required not to change their position, a cylindrical "Encap" to deform the surfaces inside a proper domain, limiting the morphing action while respecting the tolerances.…”

Section: Rbf Parametersmentioning

confidence: 99%

A mesh morphing computational method for geometry optimization of assembled mechanical systems with flexible components

Calı̀

Ambu

2022

Int J Interact Des Manuf

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In this paper an interactive computational methodology was developed assuming that shape and size optimization of flexible components can significantly improve energy absorption or storage ability in assembled systems with flexible components (AS-FC). A radial basis functions mesh morphing formulation in non-linear numerical finite element analysis, including contact problems and flow interaction, was adopted as optimal design method to optimize shape and size design parameters in AS-FC. Flexible components were assembled in finite element environment according to functional ISO-ASME tolerances specification; non-linear structural analysis with flow interaction analysis was performed. The results of the study showed that the proposed method allows to optimize the shape and size of the flexible components in AS-FC maximizing the system's ability to absorb or store energy. The potentiality of the method and its forecasting capability were discussed for the case study of an automotive crash shock in which the specific energy absorption was increased by over 40%. The case studied refers to a simple flexible component geometry, but the method could be extended to systems with more complex geometries.

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“…In the cardiovascular field, morphing approaches were employed in [9] for the registration procedures of the cardiac muscle and to model an aorta aneurysm by exploiting a one-way FSI [10,11,12]. In literature RBF have been extensively employed to tackle FSI problems [13], using the modal method for both static [14,15] and transient simulations [16,17,18], as well as the two-way approach [19,20] with RBF-based mapping methods [21]. In this work the state of the art regarding biomedical one-way FSI applications, as shown in [12], is further improved for a transient simulation by taking into account the non-linear deformations of the wetted surfaces during motion.…”

Section: Introductionmentioning

confidence: 99%

High fidelity fluid-structure interaction by radial basis functions mesh adaption of moving walls: a workflow applied to an aortic valve

Geronzi,

Gasparotti,

Capellini

et al. 2022

Preprint

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Fluid-Structure Interaction (FSI) can be investigated by means of non-linear Finite Element Models (FEM), suitable to capture large deflections of structural parts interacting with fluids, and Computational Fluid Dynamics (CFD). High fidelity simulations are obtained using the fine spatial resolution of both the structural and fluid computational grids. A key enabler to have a proper exchange of information between the structural solver and the fluid one is the management of the interface at wetted surfaces where the grids are usually non matching. A class of applications, known also as one-way FSI problems, involves a complex movement of the walls that is known in advance as measured or as computed by FEM, and that has to be imposed at the boundaries during a transient CFD solution. Effective methods for the time marching adaption of the whole computational grid of the CFD model according to the evolving shape of its boundaries are required. A very well established approach consists of a continuum update of the mesh that is regenerated by adding and removing cells to fit the evolution of the moving walls. In this paper, starting from the work originally presented in Meshfree Methods in Computational Sciences, ICCS 2020 [1], an innovative method based on Radial Basis Functions (RBF) mesh morphing is proposed, allowing the retention of the same mesh topology suitable for a continuum update of the shape. The proposed method is exact at a set of given key configurations and relies on shape blending time interpolation between key frames. The study of the complex motion of a Polymeric-Prosthetic Heart Valve (P-PHV) is presented using the new framework and considering as a reference the established approach based on remeshing.

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Fast high fidelity CFD/CSM fluid structure interaction using RBF mesh morphing and modal superposition method

Cited by 27 publications

References 27 publications

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

A mesh morphing computational method for geometry optimization of assembled mechanical systems with flexible components

High fidelity fluid-structure interaction by radial basis functions mesh adaption of moving walls: a workflow applied to an aortic valve

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