caa a22 4500 606198962 CHVBK 20210128100936.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00348-015-1910-1 doi (NATIONALLICENCE)springer-10.1007/s00348-015-1910-1 Flow field in the wake of a bluff body driven through a steady recirculating flow [Elektronische Daten] [Stephane Poussou, Michael Plesniak] The wake produced by a bluff body driven through a steady recirculating flow is studied experimentally in a water facility using particle image velocimetry. The bluff body has a rectangular cross section of height, $$H$$ H , and width, $$D$$ D , such that the aspect ratio, AR = H/D, is equal to 3. The motion of the bluff body is uniform and rectilinear, and corresponds to a Reynolds number based on width, Re D =9,600. The recirculating flow is confined within a hemicylindrical enclosure and is generated by planar jets emanating from slots of width, $$h$$ h , such that $$Re_h=500$$ R e h = 500 . Under these conditions, experiments are performed in a closed-loop facility that enables complete optical access to the near-wake. Velocity fields are obtained up to a distance of $$13D$$ 13 D downstream of the moving body. Data include a selection of phase-averaged velocity fields representative of the wake for a baseline case (no recirculation) and an interaction case (with recirculation). Results indicate that the transient downwash flow typically observed in wakes behind finite bodies of small aspect ratio is significantly perturbed by the recirculating flow. The wake is displaced from the ground plane and exhibits a shorter recirculation zone downstream of the body. In summary, it was found that the interaction between a bluff body wake and a recirculating flow pattern alters profoundly the dynamics of the wake, which has implications on scalar transport in the wake. Springer-Verlag Berlin Heidelberg, 2015 Poussou Stephane School of Mechanical Engineering, Purdue University, 47907, West Lafayette, IN, USA aut Plesniak Michael Department of Mechanical and Aerospace Engineering, The George Washington University, 800 22nd Street, N.W., 20052, Washington, DC, USA aut Experiments in Fluids Springer Berlin Heidelberg 56/2(2015-02-01), 1-16 0723-4864 56:2<1 2015 56 348 https://doi.org/10.1007/s00348-015-1910-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-1910-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Poussou Stephane School of Mechanical Engineering, Purdue University, 47907, West Lafayette, IN, USA aut NATIONALLICENCE 700 1- Plesniak Michael Department of Mechanical and Aerospace Engineering, The George Washington University, 800 22nd Street, N.W., 20052, Washington, DC, USA aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/2(2015-02-01), 1-16 0723-4864 56:2<1 2015 56 348