Flip-Flop Flow Control inside Streamwise Diverging Diamond-Shaped Cylinder Bundles with Concavities - Journal of Flow Control, Measurement & Visualization

JFCMV > Vol.1 No.3, October 2013

Flip-Flop Flow Control inside Streamwise Diverging Diamond-Shaped Cylinder Bundles with Concavities ()

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DOI: 10.4236/jfcmv.2013.13010 3,455 Downloads 6,408 Views Citations

Author(s)

Shuichi Torii, Shizaburo Umeda

Affiliation(s)

Department of Architecture and Civil Engineering, Fukuyama University, Fukuyama, Japan.
Department of Mechanical System Engineering, Kumamoto University, Kumamoto, Japan.

ABSTRACT

The flow visualization work with the aid of PIV and Piezometer deals with flip-flop flow around diamond-shaped cylinder bundle revised with concavities on both bundle walls. It is disclosed that 1) the concavity constructed on both side-walls of a diamond cylinder induces a substantial change in the flow patterns in the exit jet-stream field and jet- stream dispersion, 2) pressure characteristics are quantitatively measured in a diverging-flow region in diamond cylinder bundles with concavityand in its downstream region, and 3) flip-flop flow occurs in the flow passages and its occurrence condition is obtained.

KEYWORDS

Flip-Flop Flow; Streamwise Diverging Diamond-Shaped Cylinder Bundle; PIV Measurement; Concavity

Share and Cite:

S. Torii and S. Umeda, "Flip-Flop Flow Control inside Streamwise Diverging Diamond-Shaped Cylinder Bundles with Concavities," Journal of Flow Control, Measurement & Visualization, Vol. 1 No. 3, 2013, pp. 77-85. doi: 10.4236/jfcmv.2013.13010.

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