The effect of ambient pressure on ejecta sheets from free-surface ablation

Handle URI:
http://hdl.handle.net/10754/621586
Title:
The effect of ambient pressure on ejecta sheets from free-surface ablation
Authors:
Marston, J. O.; Mansoor, Mohammad M. ( 0000-0001-9196-0960 ) ; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 ) ; Truscott, T. T.
Abstract:
We present observations from an experimental study of the ablation of a free liquid surface promoted by a focused laser pulse, causing a rapid discharge of liquid in the form of a very thin conical-shaped sheet. In order to capture the dynamics, we employ a state-of-the-art ultra-high-speed video camera capable of capturing events at (Formula presented.) fps with shutter speeds down to 20 ns, whereby we were able to capture not only the ejecta sheet, but also the shock wave, emerging at speeds of up to 1.75 km/s, which is thus found to be hypersonic (Mach 5). Experiments were performed at a range of ambient pressures in order to study the effect of air drag on the evolution of the sheet, which was always observed to dome over, even at pressures as low as 3.8 kPa. At reduced pressures, the extended sheet evolution led to the formation of interference fringe patterns from which, by comparison with the opening speed of rupture, we were able to determine the ejecta thickness. © 2016, Springer-Verlag Berlin Heidelberg.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Marston JO, Mansoor MM, Thoroddsen ST, Truscott TT (2016) The effect of ambient pressure on ejecta sheets from free-surface ablation. Experiments in Fluids 57. Available: http://dx.doi.org/10.1007/s00348-016-2141-9.
Publisher:
Springer Nature
Journal:
Experiments in Fluids
Issue Date:
16-Apr-2016
DOI:
10.1007/s00348-016-2141-9
Type:
Article
ISSN:
0723-4864; 1432-1114
Sponsors:
The research was partially funded by KAUST Office of Competitive Research Funds. The authors thank Jesse Belden for assistance with the interferometry calculations.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorMarston, J. O.en
dc.contributor.authorMansoor, Mohammad M.en
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.contributor.authorTruscott, T. T.en
dc.date.accessioned2016-11-03T08:32:43Z-
dc.date.available2016-11-03T08:32:43Z-
dc.date.issued2016-04-16en
dc.identifier.citationMarston JO, Mansoor MM, Thoroddsen ST, Truscott TT (2016) The effect of ambient pressure on ejecta sheets from free-surface ablation. Experiments in Fluids 57. Available: http://dx.doi.org/10.1007/s00348-016-2141-9.en
dc.identifier.issn0723-4864en
dc.identifier.issn1432-1114en
dc.identifier.doi10.1007/s00348-016-2141-9en
dc.identifier.urihttp://hdl.handle.net/10754/621586-
dc.description.abstractWe present observations from an experimental study of the ablation of a free liquid surface promoted by a focused laser pulse, causing a rapid discharge of liquid in the form of a very thin conical-shaped sheet. In order to capture the dynamics, we employ a state-of-the-art ultra-high-speed video camera capable of capturing events at (Formula presented.) fps with shutter speeds down to 20 ns, whereby we were able to capture not only the ejecta sheet, but also the shock wave, emerging at speeds of up to 1.75 km/s, which is thus found to be hypersonic (Mach 5). Experiments were performed at a range of ambient pressures in order to study the effect of air drag on the evolution of the sheet, which was always observed to dome over, even at pressures as low as 3.8 kPa. At reduced pressures, the extended sheet evolution led to the formation of interference fringe patterns from which, by comparison with the opening speed of rupture, we were able to determine the ejecta thickness. © 2016, Springer-Verlag Berlin Heidelberg.en
dc.description.sponsorshipThe research was partially funded by KAUST Office of Competitive Research Funds. The authors thank Jesse Belden for assistance with the interferometry calculations.en
dc.publisherSpringer Natureen
dc.titleThe effect of ambient pressure on ejecta sheets from free-surface ablationen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalExperiments in Fluidsen
dc.contributor.institutionDepartment of Chemical Engineering, Texas Tech University, Lubbock, TX, United Statesen
dc.contributor.institutionDepartment of Mechanical and Aerospace Engineering, Utah State University, Logan, UT, United Statesen
kaust.authorMansoor, Mohammad M.en
kaust.authorThoroddsen, Sigurdur T.en
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