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Shiho Tanaka
Tokyo University of Science
ParticleConvectionPhysicsMarangoni numberMarangoni effect
13Publications
5H-index
217Citations
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Publications 13
Newest
#1D. Schwabe (University of Giessen)H-Index: 12
#2A. I. Mizev (University of Giessen)H-Index: 8
Last. Shiho Tanaka (Ridai: Tokyo University of Science)H-Index: 5
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We report on the behavior of small particles of dilute concentration in time-dependent (oscillatory) thermocapillary flow in cylindrical liquid bridges. The particles accumulate in a dynamic string for certain aspect ratios of the liquid bridge and at, typically, two times the critical Marangoni number for the onset of time dependence. This was observed for particles with a density larger and smaller than that of the fluid and for the isodense case. If looked at in a snapshot, this string would ...
57 CitationsSource
#1D. SchwabeH-Index: 12
#2A. I. MizevH-Index: 8
Last. Hiroshi Kawamura (Ridai: Tokyo University of Science)H-Index: 18
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The formation of a dynamic spiral string of particles with larger density than the fluid was investigated for time-dependent thermocapillary flow in liquid bridges under various gravity conditions including microgravity. The dynamic spiral string forms after approximately 20–60 oscillation periods from the homogeneous dilute particle suspension. It was found that the action of gravity is not decisive in the process of the particle accumulation structure (PAS) but gravity influences the flow fiel...
33 CitationsSource
#1Shiho Tanaka (Ridai: Tokyo University of Science)H-Index: 5
#2Hiroshi Kawamura (Ridai: Tokyo University of Science)H-Index: 18
Last. D. SchwabeH-Index: 1
view all 4 authors...
Thermocapillary convection is induced in a liquid bridge by a nonuniform surface tension distribution caused by an axial temperature difference. A toroidal vortex is formed by the thermocapillary force over the free surface. The induced flow is visualized by using fine particles as tracers. At a sufficiently high Marangoni number, three-dimensional standing and traveling oscillatory flows appear, and under certain flow conditions, the tracer particles form particle accumulation structures (PAS)....
43 CitationsSource
#1Hiroshi KawamuraH-Index: 34
#2Shiho TanakaH-Index: 5
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#2Shiho TanakaH-Index: 5
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Source
#1Shiho Tanaka (Ridai: Tokyo University of Science)H-Index: 5
#2Ichiro UenoH-Index: 14
Last. Hiroshi Kawamura (Ridai: Tokyo University of Science)H-Index: 18
view all 3 authors...
Thermocapillary convection in a liquid bridge is induced by non-uniform surface tension distribution over the free surface owing to a temperature difference between two cylindrical rods sustaining the liquid bridge. The induced flow is usually visualized by using fine particles as tracers. Under certain flow conditions, the tracer particles were found to form particle accumulation structures (PAS). Four types of PAS were found in different flow fields. The conditions for the occurrence of PAS we...
1 CitationsSource
#1Ichiro Ueno (Ridai: Tokyo University of Science)H-Index: 14
#2Shiho Tanaka (Ridai: Tokyo University of Science)H-Index: 5
Last. Hiroshi Kawamura (Ridai: Tokyo University of Science)H-Index: 18
view all 3 authors...
Thermocapillary-driven convection in a half-zone liquid bridge was investigated experimentally. The induced flows were categorized into several regimes mainly through the pattern of the suspended particle motion in the bridge and the surface temperature variation. Special attention was paid to the flow structures far beyond the critical condition. Chaotic and turbulent flows were realized in this configuration. They were distinguished from the periodic oscillatory flow by applying the pseudo-pha...
72 CitationsSource
#2Shiho TanakaH-Index: 5
Last. Hiroshi KawamuraH-Index: 34
view all 4 authors...
#1Ichiro UenoH-Index: 14
#2Shiho TanakaH-Index: 5
Last. Hiroshi KawamuraH-Index: 34
view all 3 authors...
#2Shiho TanakaH-Index: 5
Last. Hiroshi KawamuraH-Index: 34
view all 4 authors...
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