Space–time techniques for computational aerodynamics modeling of flapping wings of an actual locust

Takizawa, Kenji; Henicke, Bradley; Puntel, Anthony; Kostov, Nikolay; Tezduyar, Tayfun E.

doi:10.1007/s00466-012-0759-x

Cited by 121 publications

(101 citation statements)

References 102 publications

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“…The computations reported in 2012 were for detailed analysis of parachute FSI [85][86][87][88], arterial FSI [89,90], flow in aneurysms blocked with stent [91], wind-turbine aerodynamics [92], and bioinspired flapping-wing aerodynamics [18,93,94]. The detailed parachute studies, all for the Orion spacecraft parachutes, were for different designs of the suspension lines and overinflation control line, reefed parachute stages, different trial canopy design configurations, different payload models, 2-parachute clusters, FSIbased dynamical analysis of single parachutes and parachute clusters, disreefing of single parachutes and parachute clusters, parachutes with modified geometric porosity, and Stage 2 shape determination for the modified-geometric-porosity parachute.…”

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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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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“…The tracking points can be seen in Figure 31. How the wing motion and deformation data is extracted from the video data and represented using NURBS basis functions in space and time is described in detail in [51]. Figures 32 and 33 show the wind tunnel photographs and the computational model at eight points in time.…”

Section: Examplesmentioning

confidence: 99%

Main aspects of the space–time computational FSI techniques and examples of challenging problems solved

Takizawa

Tezduyar

2014

Mechanical Engineering Reviews

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Flow problems with moving boundaries and interfaces include fluid-structure interaction (FSI) and a number of other classes of problems, have an important place in engineering analysis and design, and offer some formidable computational challenges. Bringing solution and analysis to such flow problems motivated the development of the Deforming-Spatial-Domain/Stabilized Space-Time (DSD/SST) method. Since its inception, the DSD/SST method and its improved versions have been applied to a diverse set of challenging problems with a common core computational technology need. The classes of problems solved include free-surface and two-fluid flows, fluid-object and fluid-particle interaction, FSI, and flows with solid surfaces in fast, linear or rotational relative motion. Some of the most challenging FSI problems, including parachute FSI and arterial FSI, are being solved and analyzed with the DSD/SST method as a core technology. Better accuracy and improved turbulence modeling were brought with the recently-introduced variational multiscale (VMS) version of the DSD/SST method, which is called DSD/SST-VMST (also ST-VMS). In specific classes of problems, such as parachute FSI, arterial FSI, aerodynamics of flapping wings, and wind-turbine aerodynamics, the scope and accuracy of the FSI modeling were increased with the special ST FSI techniques targeting each of those classes of problems. This article provides an overview of the core ST FSI technique, its recent versions, and the special ST FSI techniques. It also provides examples of challenging problems solved and analyzed in parachute FSI, arterial FSI, aerodynamics of flapping wings, and wind-turbine aerodynamics.

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“…These desirable features do not come easily or do not come at all with the interface-capturing (nonmoving-mesh) methods. Comments on and examples for what the DSD/SST method brings to the table beyond what the ALE method does can be found in [4], and also in [4,[10][11][12]60,64,66,[68][69][70][71][72][73], including examples from aerodynamics of flapping wings and wind turbines and fluid mechanics of heart valves.…”

Section: Introductionmentioning

confidence: 97%

“…Examples, with the cited references reporting recent computations, are spacecraft aerodynamics [53], spacecraft parachutes [12,[54][55][56][57][58][59][60], cardiovascular fluid mechanics [4,[60][61][62][63][64][65][66][67], flapping-wing aerodynamics [4,60,64,[68][69][70], wind-turbine aerodynamics [60,64,71,72], and data compression [73].…”

Section: Introductionmentioning

confidence: 99%

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

2015

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Computational analysis of flapping-wing aerodynamics with wing clapping was one of the classes of computations targeted in introducing the space-time (ST) interface-tracking method with topology change (ST-TC). The ST-TC method is a new version of the deforming-spatialdomain/stabilized ST (DSD/SST) method, enhanced with a master-slave system that maintains the connectivity of the "parent" fluid mechanics mesh when there is contact between the moving interfaces. With that enhancement and because of its ST nature, the ST-TC method can deal with an actual contact between solid surfaces in flow problems with moving interfaces. It accomplishes that while still possessing the desirable features of interface-tracking (moving-mesh) methods, such as better resolution of the boundary layers. Earlier versions of the DSD/SST method, with effective mesh update, were already able to handle moving-interface problems when the solid surfaces are in near contact or create near TC. Flapping-wing aerodynamics of an actual locust, with the forewings and hindwings crossing each other very close and creating near TC, is an example of successfully computed problems. Flapping-wing aerodynamics of a micro aerial vehicle (MAV) with the wings of an actual locust is another example. Here we show how the ST-TC method enables 3D computational analysis of flapping-wing aerodynamics of an MAV with wing clapping. In the analysis,

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Space–time techniques for computational aerodynamics modeling of flapping wings of an actual locust

Cited by 121 publications

References 102 publications

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

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

Main aspects of the space–time computational FSI techniques and examples of challenging problems solved

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

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