Modelling of the evaporation of a droplet suspended in a binary atmosphere

Oberman, Glen J. & Farrell, Troy W. (2016) Modelling of the evaporation of a droplet suspended in a binary atmosphere. International Journal of Heat and Mass Transfer, 92, pp. 381-393.

[img] PDF (238kB)
Administrators only until January 2018 | Request a copy from author
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

View at publisher

Abstract

The process of spray drying is applied in a number of contexts. One such application is the production of a synthetic rock used for storage of nuclear waste. To establish a framework for a model of the spray drying process for this application, we here develop a model describing evaporation from droplets of pure water, such that the model may be extended to account for the presence of colloid within the droplet. We develop a spherically-symmetric model and formulate continuum equations describing mass, momentum, and energy balance in both the liquid and gas phases from first principles. We establish appropriate boundary conditions at the surface of the droplet, including a generalised Clapeyron equation that accurately describes the temperature at the surface of the droplet. To account for experiment design, we introduce a simplified platinum ball and wire model into the system using a thin wire problem. The resulting system of equations is transformed in order to simplify a finite volume solution scheme. The results from numerical simulation are compared with data collected for validation, and the sensitivity of the model to variations in key parameters, and to the use of Clausius–Clapeyron and generalised Clapeyron equations, is investigated. Good agreement is found between the model and experimental data, despite the simplicity of the platinum phase model.

Impact and interest:

4 citations in Scopus
4 citations in Web of Science®
Search Google Scholar™

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 89599
Item Type: Journal Article
Refereed: Yes
Keywords: droplet evaporation, sol gel, spray drying, mathematical model, transport phenomena
DOI: 10.1016/j.ijheatmasstransfer.2015.08.080
ISSN: 0017-9310
Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > APPLIED MATHEMATICS (010200) > Applied Mathematics not elsewhere classified (010299)
Divisions: Current > Schools > School of Mathematical Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier Ltd.
Deposited On: 28 Oct 2015 02:19
Last Modified: 01 Nov 2015 04:54

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page