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Rheometer |
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rheometer [rē′äm·əd·ər]
(engineering) An instrument for determining flow properties of solids by measuring relationships between stress, strain, and time. Rheometer an instrument for measuring the flow of a viscous fluid. In the USSR, the term is applied to a type of rate-of-flow meter that measures the volume flow of a gas. The operation of such a rheometer is based on the measurement of the pressure drop across a constriction in the pipe through which the gas flows; the constriction may be in the form of an orifice or capillary tube. The pressure drop is a single-valued function of the flow rate of the gas and is measured by a differential manometer, whose scale is generally marked in units of gas flow, such as cm3/min or liters per hour (l/hr). Such rheometers are used for measuring flow rates of up to 104l/hr in industrial and laboratory installations. For example, they are used in equipment for the chlorination of water and in devices for the quantitative analysis of the composition of gases. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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