Deforming Mesh With Unsteady Turbulence
Model For Fluid-structure Interaction
Author(s)
J.-T. Yeh
Abstract
By taking the mesh of the fluid domain as a virtual solid and using the explicit
integration scheme to solve the solid dynamics, a deforming mesh method is
proposed for the simulation of fluid-structure interaction. The deforming mesh
method with an unsteady turbulence model has been implemented into a finite
element code derived from slightly compressible flow formulation and an
explicit integration scheme. Due to the explicit integration scheme used for the
dynamics of both deforming mesh and fluid flow, it is easy to perform parallel
computation for a large-scale fluid-structure interaction problem. After the
validation of this approach on the flow induced vibration of the flow past a
circular cylinder, the unsteady fluid-structure interaction of a heat exchangertube
row in crossflow is demonstrated.
Keywords: deforming mesh, unsteady turbulence model, fluid-structure
interaction.
1 Introduction
The fluid-structure interaction, the unsteady fluid flow making a structure move
or deform and the motion of the structure changing the fluid flow, is an
important topic in many engineering fields, for example, the flutter of aircraft’s
wings and the flow induced vibration of tube bundle in heat exchangers. To have
a good numerical simulation of the fluid structure interaction, a sufficiently
accurate model to solve the unsteady flow field, especially for turbulent flow,
and an efficiency method to update the grid/mesh of fluid domain due to the
motion of boundaries are of great concern.
Keywords
deforming mesh, unsteady turbulence model, fluid-structure
interaction.
Related Book
Other papers in this volume
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