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Articles 31 - 33 of 33
Full-Text Articles in Physics
Exploring The Physics With Computer Animation, T. J. Bensky
Exploring The Physics With Computer Animation, T. J. Bensky
Physics
No abstract provided.
Review Of Ola Dahlman Et Al., Detect And Deter: Can Countries Verify The Nuclear Test Ban, David Hafemeister
Review Of Ola Dahlman Et Al., Detect And Deter: Can Countries Verify The Nuclear Test Ban, David Hafemeister
Physics
No abstract provided.
Fluid Elasticity Can Enable Propulsion At Low Reynolds Number, Nathan C. Keim, Mike Garcia, Paulo E. Arratia
Fluid Elasticity Can Enable Propulsion At Low Reynolds Number, Nathan C. Keim, Mike Garcia, Paulo E. Arratia
Physics
Conventionally, a microscopic particle that performs a reciprocal stroke cannot move through its environment. This is because at small scales, the response of simple Newtonian fluids is purely viscous and flows are time-reversible. We show that by contrast, fluid elasticity enables propulsion by reciprocal forcing that is otherwise impossible. We present experiments on rigid objects actuated reciprocally in viscous fluids, demonstrating for the first time a purely elastic propulsion set by the object’s shape and boundary conditions. We describe two different artificial “swimmers” that experimentally realize this principle.