Abstract
The Technical viscometers, which include Redwood, Saybolt, and Englar viscometers, have various defects. Therefore, the author carried out this experiment to find the characteristics of viscous flow through various kind of tubes and orifices into the air vertically, and to make a new Technical absolute viscometer. More than forty numbers of tubes, short tubes and orifices (the diameters of which being 0.03-0.53 cm. and the ratio of the length of the tubes or orifices to their diameters 0.024-124.6) were taken for this experiment. This paper presents the apparatus, the method of experiment, the flow pattern from the end of the tube or orifice into the air, and the relation between the coefficient of discharge and the Raynold's number.
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