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The speed of a torsional stress wave transmitted in a solid waveguide, that has a non-circular cross-section and is submerged in a liquid, is inversely proportional to the density of the liquid. Thus, by measuring the speed of the torsional stress wave, one can obtain information about the liquid's density or density-related characteristics such as liquid level and the mass composition of bi-phase mixtures. A predictive theory is developed to correlate the speed of the wave with the liquid's density and the shape of the waveguide's cross-section. The theory is used to optimize the waveguide's geometry so as to increase the sensor's sensitivity. The theoretical results are compared and found to favorably agree with experimental observations.
Kim, Jin O. and Bau, Haim H., "On line, Real-Time Densimeter-Theory and Optimization" (1988). Departmental Papers (MEAM). 204.
Date Posted: 17 August 2010
This document has been peer reviewed.