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From red cells to snowboarding: a new concept for a train track
Qianhong Wu1, Yiannis Andreopoulos, Sheldon Weinbaum
1Department of Biomedical Engineering & New York Center for Biomedical Engineering, The City College of the City University of New York, 140th Street at Convent Avenue, New York, New York 10031, USA.
Abstract:
Feng and Weinbaum [J. Fluid Mech. 422, 282 (2000)]] have shown that there is a remarkable dynamic similarity between a red cell gliding on the endothelial surface glycocalyx and a human snowboarding on fresh powder although they differ in mass by 10(15). The lift forces in each case are 4 orders of magnitude greater than classical lubrication theory. Herein we report the first measurements of the pore pressures generated on the time scale of snowboarding and show a feasibility of designing a train that can glide on a track whose permeability and elastic properties are similar to goose down.
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