Space---time VMS computation of wind-turbine rotor and tower aerodynamics

Authors:
Kenji Takizawa;Tayfun E. Tezduyar;Spenser Mcintyre;Nikolay Kostov;Ryan Kolesar;Casey Habluetzel
Affiliations:
Department of Modern Mechanical Engineering and Waseda Institute for Advanced Study, Waseda University, Tokyo, Japan 169-8050;Mechanical Engineering, Rice University, Houston, USA 77005;Mechanical Engineering, Rice University, Houston, USA 77005;Mechanical Engineering, Rice University, Houston, USA 77005;Mechanical Engineering, Rice University, Houston, USA 77005;Mechanical Engineering, Rice University, Houston, USA 77005
Venue:
Computational Mechanics
Year:
2014

Citing 21
Cited 1

GMRES: a generalized minimal residual algorithm for solving nonsymmetric linear systems

SIAM Journal on Scientific and Statistical Computing
Discontinuity-capturing finite element formulations for nonlinear convection-diffusion-reaction equations

Computer Methods in Applied Mechanics and Engineering
Streamline upwind/Petrov-Galerkin formulations for convection dominated flows with particular emphasis on the incompressible Navier-Stokes equations

Computer Methods in Applied Mechanics and Engineering - Special edition on the 20th Anniversary
A new strategy for finite element computations involving moving boundaries and interfaces—the deforming-spatial-domain/space-time procedure. I: The concept and the preliminary numerical tests

Computer Methods in Applied Mechanics and Engineering
A new strategy for finite element computations involving moving boundaries and interfaces—the deforming-spatial-domain/space-time procedure. II: Computation of free-surface flows, two-liquid flows, and flows with drifting cylinders

Computer Methods in Applied Mechanics and Engineering
Incompressible flow computations with stabilized bilinear and linear equal-order-interpolation velocity-pressure elements

Computer Methods in Applied Mechanics and Engineering
A Fast and High Quality Multilevel Scheme for Partitioning Irregular Graphs

SIAM Journal on Scientific Computing
Methods for parallel computation of complex flow problems

Parallel Computing - Special Anniversary issue
Parallel Finite-Element Computation of 3D Flows

Computer
On the Nonnormality of Subiteration for a Fluid-Structure-Interaction Problem

SIAM Journal on Scientific Computing
Large eddy simulation of turbulent Taylor-Couette flow using isogeometric analysis and the residual-based variational multiscale method

Journal of Computational Physics
Blood vessel tissue prestress modeling for vascular fluid-structure interaction simulation

Finite Elements in Analysis and Design
A parallel sparse algorithm targeting arterial fluid mechanics computations

Computational Mechanics
Stabilized space---time computation of wind-turbine rotor aerodynamics

Computational Mechanics
Multiscale space---time fluid---structure interaction techniques

Computational Mechanics
Accurate fluid-structure interaction computations using elements without mid-side nodes

Computational Mechanics
Wind turbine aerodynamics using ALE---VMS: validation and the role of weakly enforced boundary conditions

Computational Mechanics
Space---time computational analysis of bio-inspired flapping-wing aerodynamics of a micro aerial vehicle

Computational Mechanics
Fluid---structure interaction modeling of wind turbines: simulating the full machine

Computational Mechanics
Computational analysis of noise reduction devices in axial fans with stabilized finite element formulations

Computational Mechanics
Space---time techniques for computational aerodynamics modeling of flapping wings of an actual locust

Computational Mechanics

Space---time computation techniques with continuous representation in time (ST-C)

Computational Mechanics

Quantified Score

Hi-index	0.00

Visualization

Abstract

We present the space---time variational multiscale (ST-VMS) computation of wind-turbine rotor and tower aerodynamics. The rotor geometry is that of the NREL 5MW offshore baseline wind turbine. We compute with a given wind speed and a specified rotor speed. The computation is challenging because of the large Reynolds numbers and rotating turbulent flows, and computing the correct torque requires an accurate and meticulous numerical approach. The presence of the tower increases the computational challenge because of the fast, rotational relative motion between the rotor and tower. The ST-VMS method is the residual-based VMS version of the Deforming-Spatial-Domain/Stabilized ST (DSD/SST) method, and is also called "DSD/SST-VMST" method (i.e., the version with the VMS turbulence model). In calculating the stabilization parameters embedded in the method, we are using a new element length definition for the diffusion-dominated limit. The DSD/SST method, which was introduced as a general-purpose moving-mesh method for computation of flows with moving interfaces, requires a mesh update method. Mesh update typically consists of moving the mesh for as long as possible and remeshing as needed. In the computations reported here, NURBS basis functions are used for the temporal representation of the rotor motion, enabling us to represent the circular paths associated with that motion exactly and specify a constant angular velocity corresponding to the invariant speeds along those paths. In addition, temporal NURBS basis functions are used in representation of the motion and deformation of the volume meshes computed and also in remeshing. We name this "ST/NURBS Mesh Update Method (STNMUM)." The STNMUM increases computational efficiency in terms of computer time and storage, and computational flexibility in terms of being able to change the time-step size of the computation. We use layers of thin elements near the blade surfaces, which undergo rigid-body motion with the rotor. We compare the results from computations with and without tower, and we also compare using NURBS and linear finite element basis functions in temporal representation of the mesh motion.