A new puffing model for a droplet of butanol-hexadecane blends

Zhang, Y; Huang, Y; Huang, R; Huang, S; Ma, Y; Xu, S; Wang, Z

A new puffing model for a droplet of butanol-hexadecane blends

Zhang, Y Huang, Y

Huang, R Huang, S Ma, Y Xu, S Wang, Z

Permalink

Publication Type:: Journal Article
Citation:: Applied Thermal Engineering, 2018, 133 pp. 633 - 644
Issue Date:: 2018-03-25

Closed Access

	Filename	Description	Size
	1-s2.0-S1359431117330405-main.pdf	Published Version	999.44 kB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Zhang, Y	en_US
dc.contributor.author	Huang, Y https://orcid.org/0000-0001-9800-8788	en_US
dc.contributor.author	Huang, R	en_US
dc.contributor.author	Huang, S	en_US
dc.contributor.author	Ma, Y	en_US
dc.contributor.author	Xu, S	en_US
dc.contributor.author	Wang, Z	en_US
dc.date.issued	2018-03-25	en_US
dc.identifier.citation	Applied Thermal Engineering, 2018, 133 pp. 633 - 644	en_US
dc.identifier.issn	1359-4311	en_US
dc.identifier.uri	http://hdl.handle.net/10453/128156
dc.description.abstract	© 2018 Elsevier Ltd A new model was developed to investigate the puffing process of a butanol-hexadecane droplet. The puffing model took into account all the key processes, including the surface evaporation, bubble formation, bubble growth and bubble breakup. The Rayleigh equation was modified to simulate the bubble growth inside a small droplet. The sub-models for surface evaporation and bubble growth were firstly verified against the previous experimental data. Then the droplet puffing experiments of butanol-hexadecane blends were conducted under 1 bar and 750 K condition using the droplet suspension technique to further verify the puffing model. Results showed that the puffing model well simulated three phases of BUT50 (50% butanol and 50% hexadecane by mass). The three phases were the transient heating, fluctuation evaporation and equilibrium evaporation phases. An extremely strong fluctuation and several weak fluctuations were observed during the fluctuation evaporation phase from the experimental normalized squared diameter. Due to the model hypotheses, these weak fluctuations were ignored and only the strong fluctuation was simulated in the present model. Furthermore, a significant turning point was observed in the experimental temperature curve when the droplet diameter had the strong fluctuation. The occurrence of the strong fluctuation was caused by the obvious bubble expansion inside the droplet. The numerical results showed that the significant heat absorption for the bubble expansion led to the turning point in the temperature curve.	en_US
dc.relation.ispartof	Applied Thermal Engineering	en_US
dc.relation.isbasedon	10.1016/j.applthermaleng.2018.01.096	en_US
dc.subject.classification	Energy	en_US
dc.title	A new puffing model for a droplet of butanol-hexadecane blends	en_US
dc.type	Journal Article
utslib.citation.volume	133	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	0915 Interdisciplinary Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	133	en_US

Abstract:

© 2018 Elsevier Ltd A new model was developed to investigate the puffing process of a butanol-hexadecane droplet. The puffing model took into account all the key processes, including the surface evaporation, bubble formation, bubble growth and bubble breakup. The Rayleigh equation was modified to simulate the bubble growth inside a small droplet. The sub-models for surface evaporation and bubble growth were firstly verified against the previous experimental data. Then the droplet puffing experiments of butanol-hexadecane blends were conducted under 1 bar and 750 K condition using the droplet suspension technique to further verify the puffing model. Results showed that the puffing model well simulated three phases of BUT50 (50% butanol and 50% hexadecane by mass). The three phases were the transient heating, fluctuation evaporation and equilibrium evaporation phases. An extremely strong fluctuation and several weak fluctuations were observed during the fluctuation evaporation phase from the experimental normalized squared diameter. Due to the model hypotheses, these weak fluctuations were ignored and only the strong fluctuation was simulated in the present model. Furthermore, a significant turning point was observed in the experimental temperature curve when the droplet diameter had the strong fluctuation. The occurrence of the strong fluctuation was caused by the obvious bubble expansion inside the droplet. The numerical results showed that the significant heat absorption for the bubble expansion led to the turning point in the temperature curve.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/128156