The influence of cavitation history and entrained gas on liquid tensile strength

Abstract

The ab initio production of a tension pulse in a liquid has been described previously by Overton and Trevena (1981). The work described in this paper is a development of those earlier experiments. First a description is given of the way the amplitude of the tension pulse is influenced by stressing frequency, together with a determination of cavitation thresholds. Secondly, the influence of entrained gas on the amplitude of this threshold is discussed; and thirdly a study is made of the first positive pressure pulse resulting from bubble collapse.

Polymeric Hopkinson Bar-Confinement Chamber Apparatus to Evaluate Fluid Cavitation

“…After impact, the upward motion of the fluid column generates a tensile wave that is propagated to the bottom of the tube where cavitation is generated. This method is described in greater detail in the works of Hansson et al [47], Overton et al [48], and Williams et al [41,[49][50][51][52][53]. Chesterman performed tests using distilled water in a glass tube with varied impact velocities reporting effects on cavitation cluster dynamics as opposed to its generation.…”

“…Likewise, Hansson [47] performed tests on water presenting a mathematical model for the formation and collapse of cavity clusters. Overton [48] further developed the method by using a piezoelectric transducer in a cylindrical rubber block forming the base of the tube to measure pressure, and reported the apparent cavitation thresholds of negative 0.178, 0.189, 0.203 MPa for degassed fresh tap-water, deionized water, and sea-water, respectively. Williams [53] calculated cavitation thresholds as low as negative 56.6-70.2 MPa for 'nuclear-grade' deionized water at 20°C using volumetric strains obtained via high-speed imaging.…”

Water hammer with column separation: A historical review

“…Intense pre-pressurization of the liquid tends to increase its tensile strength. Plesset (1969), Overton et al (1984) and Trevena (1984Trevena ( , 1987 give in-depth treatments of tensile stresses in liquids. Recent results have been presented by Williams et al (1999), Williams and Williams (2000) and Brown and Williams (2000).…”

Improved Design of Ultrasonic Cleaning Tank Using Harmonic Response Analysis in ANSYS

“…When the solution's temperature is increased, the cleaning performance decreases. It was found that the suitable temperature of solution for cleaning is in the range of 20 -40 ๐ C, while the best cleaning temperature is below 20 ๐ C [6,7].…”