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Measurement of Aqueous Foam Rheology by Acoustic LevitationAn 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 phi = 0.77 is levitated at 30 kHz and excited into its first quadrupole resonance at 63 +/- 3 Hz. By modeling the drop as an elastic sphere, the shear modulus of the foam was estimated at 75 +/- 3 Pa.
Document ID
20010061508
Document Type
Reprint (Version printed in journal)
Authors
McDaniel, J. Gregory (Boston Univ. Boston, MA United States)
Holt, R. Glynn (Boston Univ. Boston, MA United States)
Rogers, Rich
Date Acquired
August 20, 2013
Publication Date
March 1, 2000
Publication Information
Publication: Physical Review E
Volume: 61
Issue: 3
ISSN: 1063-651X
Subject Category
Nonmetallic Materials
Funding Number(s)
CONTRACT_GRANT: NAG3-2121
PROJECT: RTOP 101-13-0A
Distribution Limits
Public
Copyright
Other