37 citations · 67 across the 9 of their papers we have counts for
9 papers
Probing the pressure dependence of sound speed and attenuation in bubbly media: Experimental observations, a theoretical model and numerical calculations
AJ. Sojahrood, Q. Li, H. Haghi +3
The problem of attenuation and sound speed of bubbly media has remained partially unsolved. Comprehensive data regarding pressure-dependent changes of the attenuation and sound spe…
Experimental and numerical evidence of intensified non-linearity at the micro and nano scale: The lipid coated acoustic bubble
AJ Sojahrood, H. Haghi, T. M. Porter +2
A lipid coated bubble (LCB) oscillator is a very interesting non-smooth oscillator with many important applications ranging from industry and chemistry to medicine. However, due to…
On the threshold of 1/2 order subharmonic emissions in the oscillations of ultrasonically excited bubbles
A. J. Sojahrood, N. R. Shirazi, H. Haghi +2
The pressure threshold for 1/2 order subharmonic (SH) emissions and period doubling during the oscillations of ultrasonically excited bubbles is thought to be minimum when the bubb…
Critical corrections to formulations of nonlinear energy dissipation of ultrasonically excited bubbles and a unifying parameter to asses and enhance bubble activity in applications
AJ Sojahrood, H Haghi, R Karshafian +1
Nonlinear oscillations of bubbles can significantly increase the attenuation of the host media. Optimization of bubble related applications needs a realistic estimation of the medi…
Nonlinear dynamics of acoustic bubbles excited by their pressure dependent subharmonic resonance frequency: oversaturation and enhancement of the subharmonic signal
A. J. Sojahrood, R. Earl, Q. Li +3
The acoustic bubble is an example of a highly nonlinear system which is the building block of several applications and phenomena ranging from underwater acoustics to sonochemistry…
Notes on the two main routes of period doubling and 1/2 order subharmonic oscillations in a bubble oscillator
A. J. Sojahrood, R. E. Earl, M. C. Kolios +1
Period doubling route to chaos is one of the well-known characteristics of nonlinear oscillators. A bubble is a highly nonlinear oscillator that exists in various phenomena and app…
On the collective behavior of interacting polydisperse microbubbles
H. Haghi, AJ Sojahrood, M. C. Kolios
Exploiting the full potential of MBs for applications requires a good understanding of their complex dynamics. Improved understanding of MB oscillations can lead to further enhance…
Pressure dependence of the ultrasound attenuation and speed in bubbly media: Theory and experiment
A. J. Sojahrood, Q. Li, H. Haghi +3
Results of the measurements of sound speed and attenuation in a bubbly medium are reported. Monodisperse bubble solutions are sonicated with broadband ultrasound pulses with pressu…
A comprehensive bifurcation method to analyze the super-harmonic and ultra-harmonic behavior of the acoustically excited bubble oscillator
AJ. Sojahrood, D. Wegierak, H. Haghi +2
Acoustically excited bubbles are involved in a wide range of phenomena and applications ranging from oceanography to sonoluminescence; they have applications in chemistry, medical…