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Ishikawa Lab
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A fluid mechanics lab that investigates and controls the vortices and flows around objects.
AboutAbout the lab
Investigating and controlling flow around objects.
The Ishikawa Lab studies flows around axisymmetric bodies such as disks and spheres, as well as the control of flow separation on wings.
The lab also works on flow control using a fluid whose viscosity changes with light, and on simulations of flow around groups of trees.
In joint research with JAXA, the lab also studies noise from propulsion systems and particle flow inside jet engines.
Key terms
- Flow separation
- A phenomenon in which flow that had followed the surface of an object leaves the surface.
- Microplasma actuator
- A low-power device used to control flow separation on wings.
- Viscosity
- The degree of a fluid's stickiness, or resistance to flow. This lab uses a fluid whose viscosity changes reversibly when it is irradiated with light.
ResearchResearch themes
The Ishikawa Lab investigates the structure of vortices and flows formed around objects, with the aim of controlling flow. Its subjects are varied, including axisymmetric bodies, wings, and groups of trees, and it uses measurement techniques such as particle image velocimetry (PIV) and computer simulation.
*Illustrative imageFlow around disks and spheres
The lab studies the flow and vortex structures formed behind disks and spheres, which are typical axisymmetric bodies. For the wake of a disk, it examines the instantaneous velocity field using a measurement technique called PIV.
*Illustrative imageFlow separation control with microplasma
The lab develops low-power microplasma actuators and studies how to use them to control flow separation on wings.
*Illustrative imageFlow control by changing viscosity with light
Using a fluid whose viscosity changes reversibly when exposed to light, the lab aims to control flow without touching it. In one research example, increasing the viscosity made the vortices disappear, and decreasing it caused vortices to form.
*Illustrative imageWindthrow damage in groups of trees
The lab uses computer simulation to analyze the structure of the flow around groups of trees and how the resulting forces act on the trees.
MembersFaculty
The members of the Ishikawa Lab are faculty members, master's students, and undergraduate students.As of 2026
- ProfessorHitoshi Ishikawa
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Model in Vortex Facility - GPN” NASA/LARC/photographer unknown / Public domain (cropped)
- Flow around disks and spheres: “PHEDRA SPHERE ICARE CNRS” Viviana lago / CC BY-SA 4.0 (cropped)
- Flow separation control with microplasma: “Flow structure comparison between linear and serpentine plasma actuators” Cpor / CC BY-SA 4.0 (cropped)
- Flow control by changing viscosity with light: “Airplane vortex edit” NASA Langley Research Center (NASA-LaRC), Edited by Fir0002 / Public domain (cropped)
- Windthrow damage in groups of trees: “Windthrow of a pine in Tuntorp, Brastad 4” W.carter / CC BY 4.0 (cropped)
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- Related lab (元祐研究室): “«Близнецы-на-чипе» - технология будущего для испытания лекарств 06” FMNLab / CC BY 4.0 (cropped)
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