Abstract
An experimental technique is demonstrated for acoustically levitating aqueous foam drops and exciting their spheroidal modes. This allows fundamental studies of foam-drop dynamics that provide an alternative means of estimating the viscoelastic properties of the foam. One unique advantage of the technique is the lack of interactions between the foam and container surfaces, which must be accounted for in other techniques. Results are presented in which a foam drop with gas volume fraction $\ensuremath{\varphi}=0.77$ is levitated at 30 kHz and excited into its first quadrupole resonance at $63\ifmmode\pm\else\textpm\fi{}3 \mathrm{Hz}.$ By modeling the drop as an elastic sphere, the shear modulus of the foam was estimated at $75\ifmmode\pm\else\textpm\fi{}3 \mathrm{Pa}.$
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
