A Mesh Morphing Based Fsi Method Used in Aeronautical Optimization Applications

Andrejašič, Matej; Erzen, David; Costa, Emiliano; Porziani, Stefano; Biancolini, Marco Evangelos; Groth, Corrado

doi:10.7712/100016.1908.7206

Cited by 16 publications

(7 citation statements)

References 14 publications

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“…On the left side, the deformed configuration for baseline is shown together with the rigid original model. A very similar approach was shown in [56], using OpenFOAM and ANSYS APDL for the optimization of the WATTsUP electric aircraft propeller, with an increase in the weighted sum of efficiencies at two different flight regimes equal to 4.0%.…”

Section: Steady Fsi Examplesmentioning

confidence: 86%

Radial Basis Functions Vector Fields Interpolation for Complex Fluid Structure Interaction Problems

Groth

Porziani

Biancolini

2021

Fluids

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Fluid structure interaction (FSI) is a complex phenomenon that in several applications cannot be neglected. Given its complexity and multi-disciplinarity the solution of FSI problems is difficult and time consuming, requiring not only the solution of the structural and fluid domains, but also the use of expensive numerical methods to couple the two physics and to properly update the numerical grid. Advanced mesh morphing can be used to embed into the fluid grid the vector fields resulting from structural calculations. The main advantage is that such embedding and the related computational costs occur only at initialization of the computation. A proper combination of embedded vector fields can be used to tackle steady and transient FSI problems by structural modes superposition, for the case of linear structures, or to impose a full non-linear displacement time history. Radial basis functions interpolation, a powerful and precise meshless tool, is used in this work to combine the vector fields and propagate their effect to the full fluid domain of interest. A review of industrial high fidelity FSI problems tackled by means of the proposed method and RBF is given for steady, transient, and non-linear transient FSI problems.

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Section: Steady Fsi Examplesmentioning

confidence: 86%

Radial Basis Functions Vector Fields Interpolation for Complex Fluid Structure Interaction Problems

Groth

Porziani

Biancolini

2021

Fluids

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“…Notable examples of RBF applications are fluid-dynamic and structural shape optimizations [14,35], fluid structure interaction [3,8], and motorsport [45], nautical [13,50], road infrastructures [48] and medical [9] analyses.…”

Section: Rbfmentioning

confidence: 99%

Fast interactive CFD evaluation of hemodynamics assisted by RBF mesh morphing and reduced order models: the case of aTAA modelling

Biancolini

Capellini

Costa

et al. 2020

Int J Interact Des Manuf

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The medical digital twin is emerging as a viable opportunity to provide patient-specific information useful for treatment, prevention and surgical planning. A bottleneck toward its effective use when computational fluid dynamics (CFD) techniques and tools are adopted for the high fidelity prediction of blood flow, is the significant computing cost required. Reduced order models (ROM) looks to be a promising solution for facing the aforementioned limit. In fact, once ROM data processing is accomplished, the consumption stage can be performed outside the computer-aided engineering software adopted for simulation and, in addition, it could be also implemented on interactive software visualization interfaces that are commonly employed in the medical context. In this paper we demonstrate the soundness of such a concept by numerically investigating the effect of the bulge shape for the ascending thoracic aorta aneurysm case. Radial basis functions (RBF) based mesh morphing enables the implementation of a parametric shape, which is used to build up the ROM framework and data. The final result is an inspection tool capable to visualize, interactively and almost in real-time, the effect of shape parameters on the entire flow field. The approach is first verified considering a morphing action representing the progression from an average healthy patient to an average aneurismatic one (Capellini et al. in Proceedings VII Meeting Italian Chapter of the European Society of Biomechanics (ESB-ITA 2017), 2017; Capellini et al. in J. Biomech. Eng. 140(11):111007-1–111007-10, 2018). Then, a set of shape parameters, suitable to consistently represent a widespread number of possible bulge configurations, are defined and accordingly generated. The concept is showcased taking into account the steady flow field at systolic peak conditions, using ANSYS®Fluent®and its ROM environment for CFD and ROM calculations respectively, and the RBF MorphTM software for shape parametrization.

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“…As visible, the FSI optimisation confirms that there is room for effectively optimise the winglet in cruise conditions. A similar multi-physic workflow has been implemented for the optimisation of the propeller of the Pipistrel’s electric aircraft WATTsUP (Andrejašič et al , 2016), obtaining an increase of the weighted sum of efficiencies at two different flight regimes equal to 4.0 per cent.…”

Section: Industrial Applications Of Fluid Structure Interaction Modal Approachmentioning

confidence: 99%

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

Groth¹,

Cella

Costa

et al. 2019

AEAT

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Purpose This paper aims to present a fast and effective approach to tackle complex fluid structure interaction problems that are relevant for the aeronautical design. Design/methodology/approach High fidelity computer-aided engineering models (computational fluid dynamics [CFD] and computational structural mechanics) are coupled by embedding modal shapes into the CFD solver using RBF mesh morphing. Findings The theoretical framework is first explained and its use is then demonstrated with a review of applications including both steady and unsteady cases. Different flow and structural solvers are considered to showcase the portability of the concept. Practical implications The method is flexible and can be used for the simulation of complex scenarios, including components vibrations induced by external devices, as in the case of flapping wings. Originality/value The computation mesh of the CFD model becomes parametric with respect to the modal shape and, so, capable to self-adapt to the loads exerted by the surrounding fluid both for steady and transient numerical studies.

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A Mesh Morphing Based Fsi Method Used in Aeronautical Optimization Applications

Cited by 16 publications

References 14 publications

Radial Basis Functions Vector Fields Interpolation for Complex Fluid Structure Interaction Problems

Radial Basis Functions Vector Fields Interpolation for Complex Fluid Structure Interaction Problems

Fast interactive CFD evaluation of hemodynamics assisted by RBF mesh morphing and reduced order models: the case of aTAA modelling

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

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