Developmentof*func.onal* hydrogel* pain.ng*for ......Investigation of drag reduction of hydrogel by...
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Development of func.onal hydrogel pain.ng for fuelefficient ship Okano laboratory
Transcript of Developmentof*func.onal* hydrogel* pain.ng*for ......Investigation of drag reduction of hydrogel by...
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Development of func.onal hydrogel pain.ng for fuel-‐efficient ship
Okano laboratory
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Water resistance
870 million ton of CO2 emission in a year
Large Frictional drag
Ribret Micro-bubble
Previous research
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Chitosan
Environment-Friendly And
Easy Application
Investigation of drag reduction mechanism of hydrogel coatings
Object
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Drag increase Drag reduc.on
Hydrogel
streamwise wavy channel spanwise wavy channel
DR = -20.4 % DR = +9.3 %
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Investigation of drag reduction of hydrogel by using a rotating cylinder facility
Motor Torque Meter
Acryl
Stainless
Camera
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Steady vortexes Turbulent
