Abstract
We present a theoretical basis for a direct method of determining buoyancy period (frequency) as a function of depth by registering the displacements and oscillations of the hydrodynamic wake formed in a stationary liquid by freely ascending bubbles (the density marker method). We achieve an error no greater than 5% by comparing theoretical computations of parameters for internal waves generated by a free submerged thin wake having uniform transverse density distribution in an exponentially stratified liquid with measurements of internal waves in the liquid. We find that there is a power law for the decrease in amplitude of internal oscillations with time.
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Additional information
Translated from Imeritel'naya Tekhnika, No. 6, pp. 15–18, June, 1998.
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Smirnov, S.A., Chashechkin, Y.D. & Il'inykh, Y.S. High-accuracy method for measuring profiles of buoyancy periods. Meas Tech 41, 514–519 (1998). https://doi.org/10.1007/BF02504319
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DOI: https://doi.org/10.1007/BF02504319