ASA 128th Meeting - Austin, Texas - 1994 Nov 28 .. Dec 02

3aPAb3. An experimental investigation of bubble shapes from a nozzle in water.

B. K. Choi

S. W. Yoon

Dept. of Phys., Sung Kyun Kwan Univ., Suwon 440-746, Republic of Korea

The shape oscillations of bubbles from a nozzle in water have been well investigated by Longuet-Higgins [M. S. Longuet-Higgins, J. Fluid Mech. 201, 543--565 (1989)]. In the present paper the elliptical deformation due to a bubble rising in water is introduced in the Longuet-Higgin's theory. The bubble shape oscillations in water are also experimentally observed using a stroboscope photographic technique. The theory with an elliptical deformation condition well describes the experimental observation of bubble shape oscillations. The dependence of antipole time on bubble radius shows good agreement between the theoretical estimation and the experimental observation. [Work supported by the Korea Science and Engineering Foundation.]