Space–time computational analysis of MAV flapping-wing aerodynamics with wing clapping

Takizawa, Kenji; Tezduyar, Tayfun E.; Buscher, Austin

doi:10.1007/s00466-014-1095-0

Cited by 107 publications

(65 citation statements)

References 77 publications

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“…The sliding-interface technique was originally developed in [23] in the context of Isogeometric Analysis (IGA) [39,45], and successfully applied to simulate offshore wind turbines in [24,43,51,52], hydraulic arresting gears in [90], and kayak propulsion in [91]. The sliding-interface formulation was recently extended to the space-time (ST) VMS method [70,72,[75][76][77][78]80], and the extension is called the "ST Slip Interface (ST-SI)" method [79,82,84,85].…”

Section: Discretization Methodsmentioning

confidence: 99%

Free-surface flow modeling and simulation of horizontal-axis tidal-stream turbines

Yan¹,

Deng²,

Korobenko³

et al. 2017

Computers & Fluids

127

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A computational free-surface flow framework that enables 3D, time-dependent simulation of horizontal-axis tidal-stream turbines (HATTs) is presented and deployed using a complexgeometry HATT. Free-surface flow simulations using the proposed framework, without any empiricism, are able to accurately capture the effect of the free surface on the hydrodynamic performance of the turbine, as demonstrated through excellent agreement with the experimental data. To carry out the free-surface computations, we have developed a novel level-set redistancing procedure compatible with the sliding-interface technique used for handling the rotor-stator interaction in the HATT full-machine simulations. To illustrate the versatility of the proposed approach, additional computations are carried out where the HATT is subjected to wave action.

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Section: Discretization Methodsmentioning

confidence: 99%

Free-surface flow modeling and simulation of horizontal-axis tidal-stream turbines

Yan¹,

Deng²,

Korobenko³

et al. 2017

Computers & Fluids

127

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“…the ST-TC method. [74][75][76] These desirable ST features and requirements motivated the development of the ST slip interface (ST-SI) method we present in this paper, which is essentially the ST version of the ALE-VMS sliding-interface method.…”

Section: Introductionmentioning

confidence: 99%

Space–time VMS method for flow computations with slip interfaces (ST-SI)

Takizawa

Tezduyar

Mochizuki

et al. 2015

Math. Models Methods Appl. Sci.

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116

140

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Math. Models Methods Appl. Sci. Downloaded from www.worldscientific.com by UNIVERSITY OF PITTSBURGH on 08/15/15. For personal use only. 2 K. Takizawa et al.representation of the circular paths associated with the spinning. The ST-SI method includes versions for cases where the SI is between fluid and solid domains with weaklyimposed Dirichlet conditions for the fluid and for cases where the SI is between a thin porous structure and the fluid on its two sides. Test computations with 2D and 3D models of a vertical-axis wind turbine show the effectiveness of the ST-SI method. -axis wind turbine. ST-VMS method for flow computations with slip interfaces 3performances of the reconnect and renode options were evaluated. The evaluations showed that the force oscillations seen immediately after the remeshing are reduced substantially with the reconnect option.The ST variational multiscale (ST-VMS) method, 52,53 which was introduced recently, is the VMS version of the DSD/SST method. The VMS components are from the residual-based VMS method given in Refs. 59-62. The ALE-VMS method, 11,15,63 which preceded ST-VMS, is a moving-mesh extension of the VMS formulation originally proposed in Ref. 61. The ST methods, naturally, have higher accuracy for a given time-step size than the semi-discrete methods such as the ALE method (see Refs. 52 and 53 for the relevant accuracy analysis). Furthermore, the ST methods can be used with higher-order basis functions in time (such as NURBS 3,5,64,65 ). This gives us not only higher accuracy in solving the governing equations but also more effective ways of motion representation 24,52,53,66 and mesh moving and remeshing (see Refs. 24,[66][67][68][69][70]. We will explain that a few paragraphs later.Moving the fluid mechanics mesh to follow a fluid-solid interface enables us to control the mesh resolution near the interface, have high-resolution representation of the boundary layers, and obtain accurate solutions in such critical flow regions. These desirable features do not come easily or do not come at all with the nonmoving-mesh methods. As the mesh is not following the interface, independent of how well the interface geometry is represented, the resolution of the boundary layer will be limited by the resolution of the fluid mechanics mesh where the interface is.In computation of flow problems where one or more of the subdomains contain spinning structures, such as the rotor of a wind turbine, we want the mesh covering the subdomain containing the spinning structure to spin with it so that we maintain the high-resolution representation of the boundary layers. For that, something needs to be done at the interfaces between the subdomains. The ST computation of this class of problems was first accomplished with the shear-slip mesh update method (SSMUM), 71,72 which was introduced in Ref. 71 and named "SSMUM" in Ref. 72.The SSMUM was originally intended for flow around two high-speed trains passing each other in a tunnel. 71 The challenge was to accurately and efficiently update the meshes use...

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“…The computations reported in 2015 and 2016 were for spacecraft parachute FSI [107,108], flapping-wing aerodynamics with wing clapping [109], thermo-fluid analysis of a truck and its tires [9], aerodynamics of a vertical-axis wind turbine [14], thermo-fluid analysis of a disk brake [15], aerodynamics of a tire with road contact and deformation [110], and ram-air parachute aerodynamics [111]. The parachute FSI computations included aerodynamic moment analysis of a single Orion spacecraft parachute, a 2-parachute cluster and JAXA subscale parachute, and detailed analysis of the Orion drogue parachute at Stage 1, 2 and 3, under different flight conditions.…”

Section: Years 2011-2018mentioning

confidence: 99%

Space–time computations in practical engineering applications: a summary of the 25-year history

Tezduyar

Takizawa

2018

Comput Mech

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In an article published online in July 2018 it was stated that the algorithm proposed in the article is "enabling practical implementation of the space-time FEM for engineering applications." In fact, space-time computations in practical engineering applications were already enabled in 1993. We summarize the computations that have taken place since then. These computations started with finite element discretization and are now also with isogeometric discretization. They were all in 3D space and were all carried out on parallel computers. For quarter of a century, these computations brought solution to many classes of complex problems ranging from Orion spacecraft parachutes to wind turbines, from patient-specific cerebral aneurysms to heart valves, from thermo-fluid analysis of ground vehicles and tires to turbocharger turbines and exhaust manifolds.

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Space–time computational analysis of MAV flapping-wing aerodynamics with wing clapping

Cited by 107 publications

References 77 publications

Free-surface flow modeling and simulation of horizontal-axis tidal-stream turbines

Free-surface flow modeling and simulation of horizontal-axis tidal-stream turbines

Space–time VMS method for flow computations with slip interfaces (ST-SI)

Space–time computations in practical engineering applications: a summary of the 25-year history

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