Dispersion and attenuation was measured for standing waves in a vertical waveguide filled with a bubbly air/water mixture. The propagation speed of pressure pulses was also measured. The data were compared with a two-fluid model for a range of values of the virtual volume coefficient, CVM. The experimentally determined CVM was found to be a function of global void fraction (〈α〉). Moreover it was noted that this CVM was less strongly related to void fraction than those proposed by Zuber (1964) and Van Wijngaarden (1976).
An Investigation of the Propagation of Pressure Perturbations in Bubbly Air/Water Flows
Ruggles, A. E., Lahey, R. T., Jr., Drew, D. A., and Scarton, H. A. (May 1, 1988). "An Investigation of the Propagation of Pressure Perturbations in Bubbly Air/Water Flows." ASME. J. Heat Transfer. May 1988; 110(2): 494–499. https://doi.org/10.1115/1.3250513
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