Dynamics of Droplet-Droplet Collision - Advancing Predictive Spray Combustion Models for a Net...

IAS Visiting Fellow Dr Peng Zhang delivers a seminar on their research, fully titled "Dynamics of Droplet-Droplet Collision - Advancing Predictive Spray Combustion Models for a Net-Zero Future" -

Droplet-droplet collision is a fundamental process in both natural phenomena and industrial applications, serving as a microcosm of multi-scale fluid dynamics. This talk unravels the intricate physics governing collision outcomes—coalescence, bouncing, and separation—beginning with the canonical case of identical droplets. We highlight the interplay between macroscopic droplet kinematics, internal flow dynamics, and microscale interfacial interactions (e.g., rarefied gas films and van der Waals forces), which collectively define the system’s multi-physics behaviour.

Expanding beyond symmetric collisions, we explore complex scenarios involving unequal-sized droplets, non-Newtonian fluids, and dissimilar droplets, alongside analogous jet-jet collisions. By synthesizing these insights, we bridge fundamental fluid dynamics with predictive spray combustion modeling, emphasizing how microscale collision physics can constrain macroscale combustion efficiency and emissions—particularly for low-carbon fuels. This work provides a framework to improve the accuracy of spray combustion simulations, supporting the development of cleaner combustion technologies.

Arrivals from 11:45 am for a 12:00 noon start. For those joining in-person, lunch will be served after the seminar from 1:00pm.

This event is hybrid format, please use the required booking button at the bottom of the page to choose either in-person or online attendance.
(Please note that in-person spaces are limited and booking is required, so we can manage numbers for catering and also the space in the seminar room)

By booking a place at this event, attendees agree to behave in a respectful manner such that everyone feels comfortable contributing as they wish. The IAS reserves the right to eject anyone who does not abide by this policy.

IAS seminars are typically recorded, minus any Q&A sessions at the end, again to encourage contributions. The recordings are then uploaded to our website on a Fellows bio page and/or Programme page, along with our IAS YouTube Channel. If you are not able to attend a seminar live, please do still register as we will email everyone who registered to let them know once the recordings are made available.