School of Mechanical, Electrical and Manufacturing Engineering

Research

Cryo Droplet Evaporation Research Project

Droplet Evaporation In Superheated Liquids

Droplet evaporation in superheated liquids plays an important role in many practical applications, such as cryogenic liquid transportation, liquid energy system, liquid food packaging and bio-tissue preservation, so it requires a more in-depth investigation.

Our Aim

The project aims to visualise and quantify the evaporation process of a droplet when immersed into another superheated immiscible liquid through detailed experimental measurement and numerical modelling. The quantitative understanding of the evaporation process can help to unlock the possibilities of controlled evaporation processes in practical applications to either increase the system efficiency or reduce the risks of over-pressurisation.

Our Research

The project aims to visualise and quantify the evaporation process of a droplet when immersed into another superheated immiscible liquid through detailed experimental measurement and numerical modelling. The quantitative understanding of the evaporation process can help to unlock the possibilities of controlled evaporation processes in practical applications to either increase the system efficiency or reduce the risks of over-pressurisation.

Our Outcomes

The team has successfully quantified the evaporation rate of a liquid nitrogen droplet in different suphearted immiscible liquids through detailed experimental measurements. A simplified quasi-steady state spherical-symmetric model has been proposed to predict the evaporation rate with good agreement with the experimental results.

The team also identified different evaporation regimes for non-cryogenic droplets in superheated liquid, including the explosive evaporation and the film evaporation. The detailed experimental and theoretical analysis results will be published in the near future.

Publication:

Rebelo, N, Zhao, H, Nadal, F, Garner, C, Williams, A (2019) Evaporation of liquid nitrogen droplets in superheated immiscible liquidsInternational Journal of Heat and Mass Transfer, 143, 118575, ISSN: 0017-9310. DOI: 10.1016/j.ijheatmasstransfer.2019.118575

Dr Huayong Zhao, Lecturer in Fluid Mechanics

“This project enable us to experimentally quantify the evaporation rate of cryogenic droplets in another supheated immiscible liquid for the first time. The team also observed many intriguing phase change process which has not been reported in the existing literature, so we are very keen to further quantify the process and eventually find ways to control the evaporation process to enable novel applications.”

Dr Huayong Zhao, Lecturer in Fluid Mechanics

Athena Swan Bronze award

Contact us

The Wolfson School of Mechanical, Electrical and Manufacturing Engineering
Loughborough University
Loughborough
Leicestershire
LE11 3TU