The Flow of Colloids which Show Anomalous Viscosity

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Abstract
In order to obtain information about the conditions of flow in solutions which show anomalous viscosity, the distribution of velocity in a straight tube of circular cross section for one of these solutions was directly determined by the methods that are usual in hydrodynamics. From a reservoir, A (Figure 1), the liquid flowed through a capillary tube (Figure 2). At the end of this tube in a box, B, was a Pitot-tube (6), by means of which the velocity head of the flowing liquid was measured. The driving pressure was measured at the points (1) and (2) with a U-shaped manometer, The Pitot-tube also was connected with one limb of a second manometer, the other limb communicating with a bore (3). As the mouth of the Pitot-tube was in exactly the same plane as that of the capillary tube and the bore (3), the velocity head was read directly on the manometer, since the hydrostatic pressure is constant in every plane perpendicular to the axis of the tube.

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