Projects per year
Abstract / Description of output
Nanobubble cavitation is advancing technologies in enhanced wastewater treatment, cancer therapy and diagnosis, and microfluidic cleaning. Current macroscale models predict that nanobubble oscillations should be isothermal, yet recent studies suggest that they are adiabatic with an associated increase in natural frequency, which becomes challenging when characterizing nanobubble sizes using ultrasound in experiments. We derive a new theoretical model that considers the nonideal nature of the nanobubble’s internal gas phase and nonequilibrium effects, by employing the van der Waals (vdW) equation of state and implementing a temperature jump term at the liquid–gas interface, respectively, finding excellent agreement with molecular dynamics (MD) simulations. Our results reveal how adiabatic behavior could be erroneously interpreted when analyzing the thermal response of the gas using the commonly employed polytropic process and explain instead how nanobubble oscillations are physically closer to their isothermal limit.
Original language | English |
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Pages (from-to) | 10841-10847 |
Journal | Nano Letters |
Volume | 23 |
Issue number | 23 |
Early online date | 4 Dec 2023 |
DOIs | |
Publication status | Published - 13 Dec 2023 |
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Dive into the research topics of 'Thermal oscillations of nanobubbles'. Together they form a unique fingerprint.-
Engineering bulk nanobubbles for enhanced water disinfection and quality
1/06/23 → 31/05/28
Project: Research
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Multiscale Simulation of Rarefied Gas Flow for Engineering Design
1/01/21 → 31/12/23
Project: Research
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From Kinetic Theory to Hydrodynamics: re-imagining two fluid models of particle-laden flows
Borg, M. & Reese, J.
1/10/17 → 30/09/21
Project: Research
Datasets
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Thermal Oscillations of Nanobubbles
Dockar, D. (Creator), Gibelli, L. (Creator) & Borg, M. (Creator), Edinburgh DataShare, 1 Dec 2023
DOI: 10.7488/ds/7554
Dataset