Internatinal Activities 2013

International collaborations in 2013

Institute Person in Charge Purpose
Bubble responses to oscillating shear at high-frequency University of Warwick, UK H.Yamauchi(M1)
I.Kumagai
Y.Murai
Finding out the mechanism of bubble-base drag reduction in high turbulence
Wake of a permeable disc in viscoelastic liquid ETH-Zurich, Swiss T.Nakashima(M1)
T.Shiratori(D2)
Y.Murai
Demonstration of UVP for external flows of viscoelastic liquid
Flow structure visualization in an expanding pipe flow Le Havre Univ, France N.Yonezawa(M1)
Y.Tasaka
Understanding flow structures formed in an expanding pipe flow
Liquid column in a box of aero turbulence Imperial College London, UK T.Oda(M1)
Y.Murai
Flow instability enhancement of liquid column in turbulence
Rayleigh-Benard convection under strong magnetic field Helmholtz-Zentrum Dresden-Rossendorf(HZDR), German Y.Yamaguchi(M1)
Y.Tasaka
Investigating critical condition of the onset of flow oscillation in Rayleigh-Benard convection with horizontal magnetic field
Ultrasonic investigation of bubbly flows(2nd) Strasbourg University, France H.Sakamaki(M1)
Y. Tasaka
Performance test of winged bubble introducer(WBI) and applying ultrasonic bubble detection method on bubbly flows generated by WBI

Numbers 2013

International Conference Collaboration Research(International) Traveling abroad Conference Organized
12 8 15 9

Internatinal Activities 2012

International collaborations in 2012

Institute Person in Charge Purpose Fruit
Ultrasound sensing of bubbles and droplets in flow Univ. of Warwick, England Y.Murai, H.Kayukawa, Y.Miyagishima(M2) Development of ultrasonic detection technique for fluid-fluid interface Highly time-resolved technique from sensed signal has been investigated Interfacial rheometry applied for a thin multi-phase layer of bubbles and solid particles
Interfacial rheometry applied for a thin multi-phase layer of bubbles and solid particles ETH-Zurich, Swiss Y.Murai,
I. Kumagai,
T.Shiratori(M2),
Y. Aikawa(M1),
T. Kimura(M1)
Application of interfacial rheometer for dispersive multiphase flow Strong shear-thinning of bubbles, and unique trend in solid particles are found
Rayleigh-Benard convection under strong magnetic field Helmholtz-Zentrum Dresden-Rossendorf(HZDR), Germany Y.Tasaka, K.Igaki(M1) Investigating flow regimes in High Rayleigh number – High Chandrasekhar number conditions New flow regime of regular flow reversal was found
Ultrasonic investigation of bubbly flows Institut de Mecanique des Fluides et des Solides(IMSF), Strasbourg University, France, UBERTONE Y.Tasaka, K.Sato(M2) Development of efficient measurement tools for bubbly flow characterization Flow field including dispersed bubbles were visualized by UB-Flow system

Numbers 2012

International Conference Collaboration Research(International) Traveling abroad Conference Organized
12 4 15 9

Internatinal Activities 2011

International collaborations in 2011

Institute Person in Charge Purpose Fruit
Index-matching visualization of immiscible liquid-liquid mixture in oscillatory circular Couette flow Univ. of Warwick, England I.Kumagai, Y.Murai Testing of rheology in fluids containing unsteadily moving interfaces Coaxial multiphase rheometry has been constructed
Responses of bubbles and drops in oscillatory planar Couette flow Univ. of Warwick, England I.Kumagai, Y.Miyagishima(M1) Quantitative assessment of non-equilibrium shear rresponses with index matching Non-equilibrium shear strain responses of drop was obtained
Interfacial rheomotry applied for a multi-phase layer of bubbles and solid particles ETH-Zurich, Swiss Y.Murai, I.Kumagai, T.Shiratori(M2) Finding unique characteristics of densely arranged dispersion in a thin layer Basic data of G' and G'' have been obtained
Wind tunnel experiment of interferences between two horizontal axis wind turbines Iowa State University, USA Y.Murai, K.Takeshima(M1) Finding elements causing the interference using high-speed PIV system Periodic flow field generated by blade tip was measured and discussed
Image processing of bubble motion in an aeration tank model Xi'an niversity of Science and Technology, China Y.Murai, K.Oyabu(M2) Development of image processing measurement technique for bubbles Automatic correlation technique for out-of-focus effect was suggested
Experimental investigation of the generation and behavior of hair-pin vortices in pipe flows The University of Manchester, England Y.Tasaka, Y.Tohge(M1) Invesigating the hair-pin vortices generated by a small jet perpendicular to the pipe flows Dependence of the wave number of the vortices on Re and amplitude of the jet is clarified.
Dynamics of thermochemical plumes in viscous flids Laboratoire FAST, Universite Paris-Sud 11 and CNRS, France I.Kumagai, R.Abe(M1) The scaling analysis of the thermocheical plume behaviors A new model of the thermochemical plume behavior has been constructed.

Numbers 2011

International Conference Collaboration Research Traveling abroad Conference Organized
26 5 20 5

Internatinal Activities 2010

International collaborations in 2010

Institute Person in Charge Purpose Fruit
Off-axis PIV measurement ofTaylo column subject to independent disk rotation Univ.ofWarwick, England Y,Murai, Y.Nambu(M2) Finding out the azimuthal instability during the rotation of waves Nambu measred 3-D structure of the column with multiple azimuthal poles
Index-maching visualization of immiscible liquid-liquid mixture in oscillatory circular Couette flow Univ.ofWarwick, England I.Kumaga, Y.Murai Finding out complex viscosity de to non-equilibrium interfacial shear A new experimental set has been constructed
Steady Couette measurement of non-Newtonian prooperty created with interfacial bubble layer ETH-Zurich, Swiss Y.Murai, I.Kumagai, Y.Takeda, Y.Aikawa(B4) Finding new effective viscosity within interfacial microbubble layer Strong shear-thinningproperty of foam layer has been found
Osillatory Couette rheometry for non-Newtonian and viscoelastic liquid ETH-Zurich, Swiss Y.Murai, Y.Takeda, Y.Shiratori(M1) Rheological data mining for SMS and PAA solutions G' and G'' characterstics of several liquid media were obtained

Numbers 2010

International Conference Collaboration Research Traveling abroad Conference Organized
17 7 9 9