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Dynamics of Flow in Wake behind Ahmed Body
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SYSNO ASEP 0323108 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Dynamics of Flow in Wake behind Ahmed Body Title Dynamika proudění v úplavu za Ahmed Body Author(s) Uruba, Václav (UT-L) RID, ORCID Source Title EUROMECH COLLOQUIUM 509, "Vehicle Aerodynamics". - Berlin : Technische Universität Berlin, 2009 / Schober M. ; Löfdahl L. - ISBN N Pages s. 236-247 Number of pages 12 s. Publication form www - www Action EUROMECH COLLOQUIUM 509 Event date 24.03.2009-25.03.2009 VEvent location Berlin Country DE - Germany Event type EUR Language eng - English Country DE - Germany Keywords wake ; dynamics ; TR-PIV ; BOD, POPs Subject RIV BK - Fluid Dynamics R&D Projects GA101/08/1112 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation The flow-field in the wake of 2D Ahmed body was studied experimentally. The study is oriented on unsteady behavior of the free shear layers arising in the wake as well as on the wake itself. Both time-mean structures and typical dynamical structures in the wake are presented. The experimental data acquired using time resolved PIV method involves both temporal and spatial correlations. The flow-field was analyzed using the Bi-Orthogonal Decomposition method as a generalization of the Proper Orthogonal Decomposition. Then, the dynamical energetic modes were identified by application of Principal Oscillation Patterns method. The provided information could be used for construction of a low-dimensional dynamic model of the flow involving physics behind the phenomenon. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
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