Suppressing the jet formation in a bubble pair excited with an ultrasonic pulse
Year: 2025
Type: article
Abstract: This study numerically explores the suppression of bubble jet formation in oscillating microbubble pairs under excitation with an ultrasonic pulse, focusing on the conditions that lead to bubble collapse without jetting. Bubble jets (i.e., liquid jets penetrating the bubble) are typically observed in collapsing bubble pairs. However, jet formation can be avoided when the distance between the bubbles is kept within a specific range. We investigate identical-sized bubble pairs aligned along an axis and subjected to a single-cycle ultrasound pulse. Simulations are conducted using the axisymmetric assumption with the ALPACA compressible multiphase flow solver. Our findings revealed that the domain where jet formation is suppressed becomes smaller as the bubble compression increases. This is demonstrated by decreasing the bubble size and the excitation frequency, which allows for greater bubble growth. These results indicate that while jet suppression is feasible for bubble pairs with high compression ratios, it becomes increasingly sensitive to distance. • Direct numerical simulation of bubble pairs excited with an ultrasonic pulse. • Jet suppression refers to bubble collapse without jetting in a bubble pair. • Investigation of parameters (bubble radii, excitation frequency and distance). • Determining the domain of jet suppression as a function of parameters.
Source: Ultrasonics Sonochemistry
Authors: Dániel Nagy, Ferenc Hegedűs
Institution: Budapest University of Technology and Economics
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,710
OpenAlex ID: W4409839144