EFFECT OF SECONDARY FLOW ON VISCOSITY MEASUREMENT USING CONE-AND-PLATE VISCOMETER

The usefulness of the cone-and-plate viscometer is limited to rotational speeds low enough for the assumption of primary flow to be valid. Experimental data for Newtonian liquids show that a theoretical result of Walters and Waters [5] satisfactorily predicts the conditions at which the effect of secondary flow becomes appreciable. © 1968.