Abstract
In gravity flow type capillary viscometer, the non-linear relationship between kinematic viscosity and efflux time can be due to two factors — the well known kinetic energy correction and the start-up flow during which the flow within the capillary attains its Poiseuillean character. The start-up contribution, however, appears to be an order of magnitude lower than that introduced by the kinetic energy correction for commonly used low-viscosity liquids encountered in practice.
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