Experimental investigation of cavitational bubble dynamics under multi-frequency system

Avvaru, Balasubrahmanyam ; Pandit, Aniruddha B. (2008) Experimental investigation of cavitational bubble dynamics under multi-frequency system Ultrasonics Sonochemistry, 15 (4). pp. 578-589. ISSN 1350-4177

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S13504...

Related URL: http://dx.doi.org/10.1016/j.ultsonch.2007.06.012


Acoustic emission spectra measurements have been carried out under mono and multi-frequency acoustic sources to understand the fundamental difference in bubble/cavity dynamics. The effect of introducing the dual and triple frequency acoustic waves of different frequency on the sono-chemical yield has also been investigated experimentally. The introduction of a second wave has increased the number of cavitating bubbles and as well as the collapsing intensity of cavities resulting into higher sono-chemical yield, and better effective utilization of reactor volume with a large number of resonating cavitating bubbles. To get the information about the intensity of each of the cavity oscillating events, decomposition of the pressure signal measured by the hydrophone in the frequency domain of the FFT power spectrum has been carried out. Inverse fourier reconstruction technique, has been used to elaborate the dynamics of the cavitating bubbles in the multi-frequency system.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Acoustic Emission Spectra; Multiple Frequency; FFT Power Spectrum; Cavitational Bubbles; Sono-chemical Yield
ID Code:39668
Deposited On:14 May 2011 12:51
Last Modified:14 May 2011 12:51

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