In the present paper the study of the two-dimensional flow field past a circular cylinder for Reynolds number up to 5 · 105 is addressed. A Lagrangian particle method approach has been exploited and the simulations have been performed with high spatial resolutions in order to resolve all the main vortical scales. Long simulation time evolutions have been performed in order to get the vortex shedding dynamics as well as the Fourier analysis of the loads. The adopted numerical method allows to discuss both local (boundary layer and near wake dynamics) and global (far wake dynamics) aspects of the problem.The fun- damental aspects related to the different identified flow states as well as the drag crisis mechanism are investigated.

Numerical simulations of the transition from laminar to chaotic behaviour of the planar vortex flow past a circular cylinder / Durante, D.; Rossi, E.; Colagrossi, A.; Graziani, Giorgio. - In: COMMUNICATIONS IN NONLINEAR SCIENCE & NUMERICAL SIMULATION. - ISSN 1007-5704. - STAMPA. - 48:(2017), pp. 18-38. [10.1016/j.cnsns.2016.12.013]

Numerical simulations of the transition from laminar to chaotic behaviour of the planar vortex flow past a circular cylinder

GRAZIANI, Giorgio
2017

Abstract

In the present paper the study of the two-dimensional flow field past a circular cylinder for Reynolds number up to 5 · 105 is addressed. A Lagrangian particle method approach has been exploited and the simulations have been performed with high spatial resolutions in order to resolve all the main vortical scales. Long simulation time evolutions have been performed in order to get the vortex shedding dynamics as well as the Fourier analysis of the loads. The adopted numerical method allows to discuss both local (boundary layer and near wake dynamics) and global (far wake dynamics) aspects of the problem.The fun- damental aspects related to the different identified flow states as well as the drag crisis mechanism are investigated.
2017
diffused vortex hydrodynamics; flow past a circular cylinder; particle method; vortex method; vortex shedding; vorticity dynamics; numerical analysis; modeling and simulation; applied mathematics
01 Pubblicazione su rivista::01a Articolo in rivista
Numerical simulations of the transition from laminar to chaotic behaviour of the planar vortex flow past a circular cylinder / Durante, D.; Rossi, E.; Colagrossi, A.; Graziani, Giorgio. - In: COMMUNICATIONS IN NONLINEAR SCIENCE & NUMERICAL SIMULATION. - ISSN 1007-5704. - STAMPA. - 48:(2017), pp. 18-38. [10.1016/j.cnsns.2016.12.013]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/930886
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