Wind and Structures

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CFD modelling of free-flight and auto-rotation of plate type debris

  • Kakimpa, B. (Department of Civil Engineering, The University of Nottingham) ;
  • Hargreaves, D.M. (Department of Civil Engineering, The University of Nottingham) ;
  • Owen, J.S. (Department of Civil Engineering, The University of Nottingham) ;
  • Martinez-Vazquez, P. (School of Civil Engineering, The University of Birmingham) ;
  • Baker, C.J. (School of Civil Engineering, The University of Birmingham) ;
  • Sterling, M. (School of Civil Engineering, The University of Birmingham) ;
  • Quinn, A.D. (School of Civil Engineering, The University of Birmingham)
  • Received : 2009.09.18
  • Accepted : 2010.01.02
  • Published : 2010.03.25
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Abstract

This paper describes the use of coupled Computational Fluid Dynamics (CFD) and Rigid Body Dynamics (RBD) in modelling the aerodynamic behaviour of wind-borne plate type objects. Unsteady 2D and 3D Reynolds Averaged Navier-Stokes (RANS) CFD models are used to simulate the unsteady and non-uniform flow field surrounding static, forced rotating, auto-rotating and free-flying plates. The auto-rotation phenomenon itself is strongly influenced by vortex shedding, and the realisable k-epsilon turbulence modelling approach is used, with a second order implicit time advancement scheme and equal or higher order advection schemes for the flow variables. Sequentially coupling the CFD code with a RBD solver allows a more detailed modelling of the Fluid-Structure Interaction (FSI) behaviour of the plate and how this influences plate motion. The results are compared against wind tunnel experiments on auto-rotating plates and an existing 3D analytical model.

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References

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