Flow dynamics in the turbulent wake of a sphere at sub-critical Reynolds numbers

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Title:	Flow dynamics in the turbulent wake of a sphere at sub-critical Reynolds numbers
Author:	Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio
Other authors:	Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics; Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
Abstract:	The direct numerical simulation of the flow over a sphere is performed. The computations are carried out in the sub-critical regime at Re = 3700 and Re = 10000 (based on the free-stream velocity and the sphere diameter). A parallel unstructured symmetry-preserving formulation is used for simulating the flow. Particular attention is devoted to investigate the shear-layer instabilities and its influence in the vortical structures in the wake of the sphere. Main features of the flow including power spectra of a set of selected monitoring probes at different positions are described and discussed in detail. Detailed information about turbulent statistics are also provided.
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids -Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica::Dinàmica -Fluid dynamics -Turbulence -Dinàmica de fluids -Turbulència
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Document type:	Article - Published version Conference Object
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