Faculty Profiles - TAKAHASHI Satoshi

Presentations -

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912 Practical method of gas separation/dissolution for water utilizing cavitation

MUKAI Takeshi, WASHIO Seiichi, TAKAHASHI Satoshi

2009.2.26 The Japan Society of Mechanical Engineers

D10 Study of measurement of components ratio in gas-mixture using optical interferometer

Hugejile, TAKAHASHI Satoshi, WASHIO Seiichi

2008.10.6 The Japan Society of Mechanical Engineers

905 Examination of on-line gas separation / dissolution method of liquid utilizing maximum developed stationary cavity in cavitation

TSUGE Tomonao, WASHIO Seiichi, TAKAHASHI Satoshi

2008.2.26 The Japan Society of Mechanical Engineers

902 Experimental study of electrification in oil now through metal channels under the condition of velocity change

TAZATO Yuki, TAKAHASHI Satoshi, WASHIO Seiichi

2008.2.26 The Japan Society of Mechanical Engineers

520 Study on single micro-bubbles

Tanimura Shuhei, Hiraki Hidenori, Deguchi Shinji, Takahashi Satoshi, Washio Seiichi

2008.1.24 The Japan Society of Mechanical Engineers

G501 Observation of Cavitation Inception in Separating Water Flows through Constrictions

FUJIYOSHI So, WASHIO Seiichi, TAKAHASHI Satoshi

Fluids engineering conference ... 2007.11.17 The Japan Society of Mechanical Engineers

Event date： 2007.11.17

Language：Japanese

The present authors have conducted observations of separating oil flows for years and have discovered a phenomenon that an infinitesimal cavity suddenly emerges on the wall close to the point of separation. The new-born cavity grows and splits releasing a lot of minute bubbles to downstream. The present paper intends to answer the following question presumably given to the discovery by traditional cavitation researchers dealing with water flow; does the same phenomenon occur in water flows with separation? Through observations of water flows in rectangular and cylindrical constrictions using a super-high speed video camera and a long distance microscope, it has been confirmed that a cavity is suddenly born near the separation point in water flows as well. In other words, the same mechanism of cavity generation at the point of separation commonly exists both in water flows and oil ones.

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G305 Observation of flow structure around the separation point using PIV method

Takahashi Satoshi, Washio Seiichi, Ogata Toshihiro

Fluids engineering conference ... 2007.11.17 The Japan Society of Mechanical Engineers

Event date： 2007.11.17

Language：Japanese

The purpose of this paper is to investigate the stress at the separation point in laminar flow from an analysis of velocity distribution obtained by PIV method. For the purpose of measurement of fluid velocity near the wall, density and size of smoke particle in air were better than those of additives in mineral oil or of scattering particles seeded in tap water. The fluid on the stream line starting from the point of separation accelerated in a narrow area with large tensile and shearing stress. This result means that huge stress is produced around at the point of separation by flow.

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512 Study of flow structure around the separation point by PIV method

Ogata Toshihiro, WASHIO Seiichi, TAKAHASHI Satoshi

2007.3.7 The Japan Society of Mechanical Engineers

913 Observation of cavitation on liquid-solid interface caused by relative motion of solid walls contacting in liquid

MURAKAMI Kenji, WASHIO Seiichi, TAKAHASHI Satoshi, DEGUCHI Shinji

2007.3.7 The Japan Society of Mechanical Engineers

917 Behavior of bubbles with transient pressurization

HOGAMI Takeru, TAKAHASHI Satoshi, WASHIO Seiichi

2007.3.7 The Japan Society of Mechanical Engineers

1005 Observation of cavitation in oil flow between poppet supported by a spring and valve seat

KIKUI Shotaro, WASHIO Seiichi, TAKAHASHI Satoshi

2007.3.7 The Japan Society of Mechanical Engineers

906 Measurement of refractive index in oil caused by gas dissolution

FUJIWARA Yasushi, TAKAHASHI Satoshi, WASHIO Seiichi

2006.2.23 The Japan Society of Mechanical Engineers

419 Observation of unique phenomena produced by separation of flow

IWAMOTO Tomoyuki, WASHIO Seiichi, TAKAHASHI Satoshi

2006.2.23 The Japan Society of Mechanical Engineers

910 Experimental study of flow electrification in oil with velocity change over metal walls

ZHU Shouxin, TAKAHASHI Satoshi, WASHIO Seiichi, TAZATO Yuki

2006.2.23 The Japan Society of Mechanical Engineers

908 Observation of Cavitation inception caused by vibrating body in oil

TADA Tatsusei, WASHIO Seiichi, TAKAHASHI Satoshi, DEGUCHI Shinji

2006.2.23 The Japan Society of Mechanical Engineers

514 Dynamic Characteristics of a Variable Contraction in a Poppet Valve

CHEN Huiqing, WASHIO Seiichi, TAKAHASHI Satoshi, ZHU Shouxin

2005.10 The Japan Society of Mechanical Engineers

208 Experimental Study on Electrification Phenomena in Dielectric Oil Flows over Metal Walls

ZHU Shouxin, TAKAHASHI Satoshi, WASHIO Seiichi

2005.10 The Japan Society of Mechanical Engineers

814 Observation of Cavitation Starting at Downstream Edge of a Constriction

TAKEDA Shinji, WASHIO Seiichi, TAKAHASHI Satoshi

2005.2.24 The Japan Society of Mechanical Engineers

812 Numerical and experimental study of separation flow in an expanding flow

MATSUBARA Shunsuke, WASHIO Seiichi, TAKAHASHI Satoshi

2005.2.24 The Japan Society of Mechanical Engineers

Observation of flow electrification using metal nets

Fujihara Hitoshi, Takahashi Satoshi, Washio Seiichi

2004.3.6 The Japan Society of Mechanical Engineers

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