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The book presents novel Computational Fluid Dynamics (CFD)
techniques to compute offshore wind and tidal applications. The
papers in this volume are based on a mini-symposium held at ECCOMAS
2018. Computational fluid dynamics (CFD) techniques are regarded as
the main design tool to explore the new engineering challenges
presented by offshore wind and tidal turbines for energy
generation. The difficulty and costs of undertaking experimental
tests in offshore environments have increased the interest in CFD
which is used to design appropriate turbines and blades, understand
fluid flow physical phenomena associated with offshore
environments, predict power production or characterise offshore
environments amongst other topics.
The book encompasses novel CFD techniques to compute offshore wind
and tidal applications. Computational fluid dynamics (CFD)
techniques are regarded as the main design tool to explore the new
engineering challenges presented by offshore wind and tidal
turbines for energy generation. The difficulty and costs of
undertaking experimental tests in offshore environments have
increased the interest in the field of CFD which is used to design
appropriate turbines and blades, understand fluid flow physical
phenomena associated with offshore environments, predict power
production or characterise offshore environments, amongst other
topics.
The book encompasses novel CFD techniques to compute offshore wind
and tidal applications. Computational fluid dynamics (CFD)
techniques are regarded as the main design tool to explore the new
engineering challenges presented by offshore wind and tidal
turbines for energy generation. The difficulty and costs of
undertaking experimental tests in offshore environments have
increased the interest in the field of CFD which is used to design
appropriate turbines and blades, understand fluid flow physical
phenomena associated with offshore environments, predict power
production or characterise offshore environments, amongst other
topics.
This work details the development and validation of an unsteady
unstructured high order ( 3) h/p Discontinuous Galerkin (DG) -
Fourier solver for the incompressible Navier-Stokes equations on
static and rotating sliding meshes in 3D. This general purpose
solver is used to provide insight into cross-flow (wind or tidal)
turbine physical phenomena. To account for the relative mesh
motion, the system of equations is written in arbitrary
Lagrangian-Eulerian form and a non-conformal DG formulation is used
for spatial discretisation. The DG method, together with a novel
sliding mesh technique, allows direct linking of rotating and
static meshes through the numerical fluxes. This technique shows
spectral accuracy and no degradation of temporal convergence rates
if rotational motion is applied to a region of the mesh. To
simulate 3D flows, the solver is parallelised and extended using
Fourier series, which enables DNS and turbulent LES simulations.
Two LES methodologies are proposed. The thesis includes solutions
for: Stokes flows, the Taylor vortex problem, flows around square
and circular cylinders, flows around static and rotating NACA foils
and rotating cross-flow turbines flows."
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