Anisotropic adaptive meshing and monolithic Variational Multiscale method for fluid–structure interaction

2013 ◽  
Vol 122 ◽  
pp. 88-100 ◽  
Author(s):  
E. Hachem ◽  
S. Feghali ◽  
R. Codina ◽  
T. Coupez
Keyword(s):  
Fluid Structure Interaction ◽  
Multiscale Method ◽  
Variational Multiscale Method ◽  
Adaptive Meshing ◽  
Fluid Structure ◽  
Variational Multiscale ◽  
Structure Interaction

ALE-VMS AND ST-VMS METHODS FOR COMPUTER MODELING OF WIND-TURBINE ROTOR AERODYNAMICS AND FLUID–STRUCTURE INTERACTION

2012 ◽  
Vol 22 (supp02) ◽  
pp. 1230002 ◽  
Author(s):  
YURI BAZILEVS ◽  
MING-CHEN HSU ◽  
KENJI TAKIZAWA ◽  
TAYFUN E. TEZDUYAR
Keyword(s):  
Wind Turbine ◽  
Computer Modeling ◽  
Fluid Structure Interaction ◽  
Turbine Rotor ◽  
Arbitrary Lagrangian Eulerian ◽  
Fluid Structure ◽  
Rotor Aerodynamics ◽  
Variational Multiscale ◽  
Structure Interaction ◽  
Wind Turbine Rotor

We provide an overview of the Arbitrary Lagrangian–Eulerian Variational Multiscale (ALE-VMS) and Space–Time Variational Multiscale (ST-VMS) methods we have developed for computer modeling of wind-turbine rotor aerodynamics and fluid–structure interaction (FSI). The related techniques described include weak enforcement of the essential boundary conditions, Kirchhoff–Love shell modeling of the rotor-blade structure, NURBS-based isogeometric analysis, and full FSI coupling. We present results from application of these methods to computer modeling of NREL 5MW and NREL Phase VI wind-turbine rotors at full scale, including comparison with experimental data.

SPACE–TIME FLUID–STRUCTURE INTERACTION METHODS

2012 ◽  
Vol 22 (supp02) ◽  
pp. 1230001 ◽  
Author(s):  
KENJI TAKIZAWA ◽  
TAYFUN E. TEZDUYAR
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Flows ◽  
Space Time ◽  
Computational Accuracy ◽  
Fluid Structure ◽  
Variational Multiscale ◽  
Structure Interaction ◽  
Flow Problems ◽  
Core Technology ◽  
Special Space

Since its introduction in 1991 for computation of flow problems with moving boundaries and interfaces, the Deforming-Spatial-Domain/Stabilized Space–Time (DSD/SST) formulation has been applied to a diverse set of challenging problems. The classes of problems computed include free-surface and two-fluid flows, fluid–object, fluid–particle and fluid–structure interaction (FSI), and flows with mechanical components in fast, linear or rotational relative motion. The DSD/SST formulation, as a core technology, is being used for some of the most challenging FSI problems, including parachute modeling and arterial FSI. Versions of the DSD/SST formulation introduced in recent years serve as lower-cost alternatives. More recent variational multiscale (VMS) version, which is called DSD/SST-VMST (and also ST-VMS), has brought better computational accuracy and serves as a reliable turbulence model. Special space–time FSI techniques introduced for specific classes of problems, such as parachute modeling and arterial FSI, have increased the scope and accuracy of the FSI modeling in those classes of computations. This paper provides an overview of the core space–time FSI technique, its recent versions, and the special space–time FSI techniques. The paper includes test computations with the DSD/SST-VMST technique.

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