Alexandros Voutsinas
Mie University
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Publication
Featured researches published by Alexandros Voutsinas.
Journal of Physics: Conference Series | 2009
Alexandros Voutsinas; Toshihiko Shakouchi; Koichi Tsujimoto; Toshitake Ando
The present study deals with the effect of the bubble size, from small bubble scale to normal scale (db=0.25~2.6 mm), on the flow passing through a rectangular cylinder in an upward gas-liquid bubbly flow. Extensive visualization experiments are conducted and a digital camera and a high-speed camera analyzed the flow, while PIV analysis by the volume cross-correlation method is conducted to observe the differences in the flow pattern. In order to further understand the effect of bubble size, the pressure distribution along the pipe and the cylinder surface are measured. From the results taken, the drag force is calculated and compared to the case of single phase-flow. Furthermore, the fluctuation phenomena generating from the Karman vortex street downstream the cylinder are investigated, and how the intensity and frequency are affected by the bubble size and gas fraction is presented. The experiments are conducted under two different Reynolds number Re, and volumetric gas fraction ranging from αv=0~5%, giving valuable information regarding the changes that occur due to bubble size differences and the relation it has with volumetric gas fraction.
Journal of Fluid Science and Technology | 2009
Alexandros Voutsinas; Toshihiko Shakouchi; Koichi Tsujimoto; Toshitake Ando
Jsme International Journal Series B-fluids and Thermal Engineering | 2006
Alexandros Voutsinas; Toshihiko Shakouchi; Junichi Takamura; Koichi Tsujimoto; Toshitake Ando
Transactions of the Japan Society of Mechanical Engineers. B | 2006
Alexandros Voutsinas; Toshihiko Shakouchi; Koich Tsujimoto; Toshitake Ando
Journal of Fluid Science and Technology | 2009
Alexandros Voutsinas; Toshihiko Shakouchi; Koichi Tsujimoto; Toshitake Ando
The Proceedings of Conference of Tokai Branch | 2008
Toshihiko Shakouchi; Takuya Shimizu; Keiji Hori; Alexandros Voutsinas; Koichi Tsujimoto; Toshitake Ando
The Proceedings of the Fluids engineering conference | 2007
Toshihiko Shakouchi; Takuya Shimizu; Alexandros Voutsinas; Koichi Tsujimoto; Toshitake Ando
The Proceedings of the Fluids engineering conference | 2005
Alexandros Voutsinas; Toshihiko Shakouchi; Shinichi Nagai; Koichi Tsujimoto; Toshitake Ando
Jets, wakes and separated flows : proceedings of International Conference on Jets, Wakes and Separated Flows, ICJWSF | 2005
Alexandros Voutsinas; Toshihiko Shakouchi; Junichi Takamura; Koichi Tsujimoto; Toshitake Ando
The Proceedings of Conference of Kyushu Branch | 2003
Toshihiko Shakouchi; Alexandros Voutsinas; Koichi Tsuzimoto; Toshitake Ando