Numerical investigation of flow around hairy flaps cylinder using FSI Capabilities

M Souli, Ç Inaki, E Sarradj, T Geyer, F Del Pin

Abstract


Flow around a cylinder has been extensively studied due to its practical importance in engineering; much attention has been devoted to drag reduction and vortex shedding suppression using active and passive control devices. A strong motivation for studying such practical problems come from the fact that large amplitude of lift fluctuation and alternate vortex shedding are generally design concerns for engineers. Several numerical and experimental studies have been devoted for studying flow around a cylinder  with a flexible plate attached to its centerline. This investigation has been known to be one of the most successful ways of controlling vortex shedding. Other active device for vortex shedding cycle reduction in order to minimize sound pressure is a cylinder equipped with hairy flaps. Experimental studies of air around a cylinder equipped with hairy flaps show that hairy flaps can reduce the wake deficit by modifying the shedding cycle behind the cylinder. For the modelisation and simulation of  such a coupling problem, fluid structure capabilities need to be performed. Fluid structure coupling problems can be solved using different solvers; a monolithic solver and a partitioned process. Monolithic process is a fully implicit method preserving energy at the fluid structure interface. However its implementation  is more complex when specific methods are required for both fluid and structure solvers. When efficient fluid and structure software packages  are available, a partitioned procedure can be used in order to couple the two codes. The present work is devoted to simulation of fluid structure interaction problems and flow around thin flexible hairy flaps, using a partitioned procedure. One of the main problems encountered in the simulation is the automatic remeshing when the flaps come into contact and the fluid mesh between the flaps undergoes high mesh distortion. . In this paper, numerical simulation has been performed and Strouhal number for two different Reynolds number Re=1.46 104 and 1.89 104 have been investigated. For both Reynolds number experimental data is available. For comparison with flow around a plain cylinder, numerical simulation were also performed and Strouhal number compared to experimental value

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References


Ozdemir. O, M. Souli M., Fahjan Y., (2010), Application of nonlinear fluid–structure interaction methods to seismic analysis of anchored and unanchored tanks, Engineering Structures 32, pp 409-423 Crossref

Longatte E., Verreman V., Souli M. Time marching for simulation of Fluid-Structure Interaction Problems. Journal of Fluids and Structures, Volume 25, Issue 1, pp 95-111 Crossref

S. Islam, Z. Chao Ying R.Manzoor, Z.Islam, S.Kalsoom, A computational study of drag reduction and vortex shedding suppression of flow past a square cylinder in presence of small control cylinders AIP Advances 7, 045119 (2017) Crossref

J.Favier; A.Dauptain; D. Basso; A. Bottaro Passive separation control using a self-adaptive hairy coating Journal of Fluid Mechanics Volume 627; 2009 , pp. 451-483 Crossref

L. Kamps; T.F. Geyer; E. Sarradj; C.Brücker Vortex shedding noise of a cylinder with hairy flaps. Journal of Sound and Vibration 388 (2017) 69–84 Crossref

Chorin A.J., (1968), Numerical solution of the Navier-Stokes equations”, Math. Comp. 22 (1968), pp 745-768 Crossref

Gresho P.M., (1990), On the theory of semi-implicit projection methods for viscous incompressible flow and its implementation via a finite element method that also introduces a nearly consistent mass matrix. Part 1: theory, Int. Journ. Num. Meth. Fluids 11, pp 587-620 Crossref

Idelson S.R; E.Onate, F.Delpin; N.Calvo Fluid Structure Interaction using the Particle Finite Element Method Computer Methods in Applied Mechanics and Engineering 2006, pp 2100-2123 Crossref

Cyril Gruau. Thierry Coupez 3D tetrahedral, unstructured and anisotropic mesh generation with adaptation to natural and multidomain metric Comput. Methods Appl. Mech. Engrg. 194 (2005) 4951–4976 Crossref

I. Çaldichoury; F.Delpin ICFD Incompressible Fluid Solver LSDYNA Theoretical Manual 2014

Aquelet N, Souli M., L. Olovson L., (2005), Euler Lagrange coupling with damping effects: Application to slamming problems, Computer Methods in Applied Mechanics and Engineering, Vol 195, pp 110-132 Crossref

Hallquist J.O., (1998), Theatrical manual for LS-DYNA, Livermore Software Technology Corporation, Livermore

Menter, F. R. (1994), Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications", AIAA Journal, vol. 32, no 8. pp. 1598-1605. Crossref

D. Kuzmin and O. Mierka (2007) On the implementation of the k − ε turbulence model in incompressible flow solvers based on a finite element discretization. International Journal of Computing Science and Mathematics 1, 2007 Crossref




DOI: http://dx.doi.org/10.21152/1750-9548.12.2.189

Copyright (c) 2018 M Souli, Ç Inaki, E Sarradj, T Geyer, F Del Pin

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