Colin John Cook MRSC. Liquids in Motion: An Investigation into Newton's model for viscosity

Natural Sciences / Physics / Fluid Dynamics

Submitted on: Apr 30, 2023, 09:03:09

Description: NewtonEs model of viscosity in liquids employs a fixed plate and a parallel moving plate separated by a gap. The moving plate takes a conceptual liquid layer along with it and the stationary plate holds a similar liquid layer in place. This creates shear between the layers, and the differences in speeds between layers was assumed to be an arithmetic progression to zero. Experimental results and logic indicate: no zero velocity in such a system, relative speeds are actually in geometric progression, and that therefore NewtonEs model is incorrect. Dimensional analyses of a rotating cylinder and a moving plate in viscous liquids both give the dimensions of viscosity as M/(L2.T), whereas the currently accepted unit of viscosity, the poise, has dimensions M/(L.T). Therefore, the poise has been incorrectly assigned to viscosity, and existing formulas lack predictive power.

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Liquids in Motion pub.doc

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