Computation of flow problems with the Mixed Interface-Tracking/Interface-Capturing Technique (MITICT)

Akin, J.E.; Tezduyar, Tayfun E.; Ungor, M.

doi:10.1016/j.compfluid.2005.07.008

Cited by 45 publications

(26 citation statements)

References 17 publications

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“…The Mixed Interface-Tracking/Interface-Capturing Technique (MITICT) [15] was introduced in 2001 for computation of flow problems that involve both interfaces that can be accurately tracked with a moving-mesh method and interfaces that are too complex or unsteady to be tracked and therefore require an interface-capturing technique. The MITICT was successfully tested in [68,69]. We believe that it is only meaningful to propose additional nonmoving-mesh techniques (that are claimed to be better alternatives to moving-mesh techniques) if the categories of problems that cannot be solved with moving-mesh techniques that the new technique is targeting are clearly identified, with computed examples of complex, real-world problems in those categories.…”

Section: Introductionmentioning

confidence: 96%

Stabilized space–time computation of wind-turbine rotor aerodynamics

et al. 2011

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We show how we use the Deforming-SpatialDomain/Stabilized Space-Time (DSD/SST) formulation for accurate 3D computation of the aerodynamics of a windturbine rotor. As the test case, we use the NREL 5MW offshore baseline wind-turbine rotor. This class of computational problems are rather challenging, because they involve large Reynolds numbers and rotating turbulent flows, and computing the correct torque requires an accurate and meticulous numerical approach. We compute the problem with both the original version of the DSD/SST formulation and a recently introduced version with an advanced turbulence model. The DSD/SST formulation with the advanced turbulence model is a space-time version of the residual-based variational multiscale method. We compare our results to those reported recently, which were obtained with the residualbased variational multiscale Arbitrary Lagrangian-Eulerian method using NURBS for spatial discretization and which we take as the reference solution. While the original DSD/SST formulation yields torque values not far from the reference solution, the DSD/SST formulation with the variational multiscale turbulence model yields torque values very close to the reference solution.

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Section: Introductionmentioning

confidence: 96%

Stabilized space–time computation of wind-turbine rotor aerodynamics

et al. 2011

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“…The MITICT was introduced for FSI with multiple fluids or free-surface flows. It was successfully used in a number of test problems [3,4]. In this work, only a comparison with the Particle Finite Element Method (PFEM) will be performed.…”

Section: Introductionmentioning

confidence: 99%

Interaction between an elastic structure and free-surface flows: experimental versus numerical comparisons using the PFEM

et al. 2008

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The paper aims to introduce new fluid-structure interaction (FSI) tests to compare experimental results with numerical ones. The examples have been chosen for a particular case for which experimental results are not much reported. This is the case of FSI including free surface flows. The possibilities of the Particle Finite Element Method (PFEM) for the simulation of free surface flows is also tested. The simulations are run using the same scale as the experiment in order to minimize errors due to scale effects. Different scenarios are simulated by changing the boundary conditions for reproducing flows with the desired characteristics. Details of the input data for all the examples studied are given. The aim is to identifying benchmark problems for FSI including free surface flows for future comparisons between different numerical approaches.

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“…In particular, recent interest in the non-interface-fitted mesh approaches [1,10,11,13,[17][18][19]21,22,24,25,[27][28][29][32][33][34][35][36][37]40,41,[46][47][48][54][55][56][58][59][60][61][62], in which the fluid and structure are described in general by the Eulerian and Lagrangian coordinates, respectively, is remarkable. One reason for this interest is associated with the practical merit of mesh generation, because the approach using a non-interface-fitted mesh can reduce human and computational costs and difficulties of the mesh generation.…”

Section: Introductionmentioning

confidence: 99%

“…Another reason, and we consider this is more important, is that this approach has a potential capability of handling the geometrical complexity of FSI problems, most of which is caused by large deformation and translation of structures. However, it is the common perception that the non-interface-fitted mesh methods still have problems in computational accuracy and reliability compared with the interface-fitted mesh methods such as the ALE based method [2][3][4]7,14,20,23,26,38,39,49] and the DSD/SST method [5,6,8,9,12,[15][16][17][30][31][32][33][40][41][42][43][44][45][50][51][52][53]57,[63][64][65][66][67][68][69][70][71][72][73]. One reason behind the perception is, we consider, that the former methods are not able to handle the continuity and discontinuity at the interface of fluid and structure as it stands, whereas integrations...…”

Section: Introductionmentioning

confidence: 99%

LLM and X-FEM based interface modeling of fluid–thin structure interactions on a non-interface-fitted mesh

Sawada

Tezuka

2011

Comput Mech

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This paper presents a non-interface-fitted mesh method for fluid-thin structure interactions. The key components are the Lagrangian Lagrange-multiplier (LLM) method and the extended finite element method (X-FEM). The LLM couples fluid and thin structure through the Lagrangian nodes of the structure element. The X-FEM gives flow discontinuity to the fluid elements intersected by the structure element. The combination method is verified through applications to flow with a domain-partitioning boundary and flow-induced flapping of a flexible filament. We discuss how the discontinuities at the interface enhance the simulation results, how the lack of the discontinuities affects the results, and identify some effects of these discontinuity enrichments.

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Computation of flow problems with the Mixed Interface-Tracking/Interface-Capturing Technique (MITICT)

Cited by 45 publications

References 17 publications

Stabilized space–time computation of wind-turbine rotor aerodynamics

Stabilized space–time computation of wind-turbine rotor aerodynamics

Interaction between an elastic structure and free-surface flows: experimental versus numerical comparisons using the PFEM

LLM and X-FEM based interface modeling of fluid–thin structure interactions on a non-interface-fitted mesh

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