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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN Imprimir: 1065-3090
ISSN En Línea: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.2013008052
pages 255-261

LARGE-SCALE HAIRPIN VORTICES FROM A PAIR OF SURFACE-MOUNTED HEMISPHERES AT A LOW REYNOLDS NUMBER

C. C. Chen
Department of Engineering Science, National Cheng Kung University, Tainan; Department of Architecture, China University of Science and Technology, Taipei, Taiwan
Jung-Hua Chou
Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan, 701
C. C. Hsu
Department of Spatial Design, Kun Shan University, Tainan, Taiwan

SINOPSIS

Flow visualization experiments are conducted to study the hairpin vortices which are shed from the wakes of a pair of surface-mounted hemispheres at a Reynolds number of about 500. The results show that the number of groups of the hairpin vortices can be one, two or three, depending on the gap between the hemispheres. As the gap increases from zero, the number of groups varies from one to three first. Then it reduces to two when the gap is large enough for the individual wakes to prevail.


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