Fluid–Structure Interaction with Low-Re Turbulence Model

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Journal Title
Journal ISSN
Volume Title
School of Science and Technology | J Muu elektroninen julkaisu
Date
2010
Major/Subject
Mcode
Degree programme
Language
en
Pages
16
Series
Abstract
Abstract: This report presents a methodology to couple fluid and structure that gives rise to a variety of phenomena with applications in many areas, such as stability analysis of airplane wings, turbomachinery/bridge design and blood flow through arteries. An efficient interface for the fluid-structure coupling is developed that resolves complications associated with the interaction between two simulation modules. The computational framework consists of a multi-block moving grid technique, the low-Re k–ǫ turbulence model, and a structure/pressure-based flow solver. The moving grid approach which handles the geometric variations in time, combines master/slave strategy and transfinite interpolation techniques. A modified Newmark–β method is used for solving the non-linear structural equation. Main result: The turbulent flow characteristics subjected to a favorable pressure gradient inside a two/three–dimensional contraction have been carried out numerically. Attention is focused on the relaminarization in the boundary layer of a flat plate (i.e.,vane), positioned at the centerline of the contraction and the downstream development of the vortex induced vibration (VIV). FINFLO handles this complex case appreciably well.
Description
MEMO No CFD/MECHA-6-2010 DATE: September 8, 2010
Keywords
FINFLO, k − ǫ model, vortex induced vibration, moving grid
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