Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6301
AuthorsAndò, B.* 
Coltelli, M.* 
Prestifilippo, M.* 
Scollo, S.* 
TitleA lab-scale experiment to measure terminal velocity of volcanic ash
Issue Date4-Jun-2010
Series/Report no./99 (2010)
DOI10.1109/TIM.2010.2090690
URIhttp://hdl.handle.net/2122/6301
Keywordslab-scale experiment
terminal settling velocity
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques 
AbstractIn this paper, a novel methodology to measure trajectory and terminal velocity of volcanic ash in laboratory is presented. The methodology consists of: i) planning a lab-scale experiment in order to reproduce the sedimentation processes of fine volcanic ash based on the principle of dynamic similarity; ii) realizing the experimental set-up using a glass tank filled with glycerine, a web-cam based vision system and a dedicated image post processing tool able to estimate the position and the terminal velocity of any particle falling in the tank; iii) performing a calibration procedure to accurately estimate the uncertainty on particle velocity; iv) comparing the experimental results with estimations obtained by some particle fallout models available in literature. Our results shows that there is a good agreement between experimental terminal velocities and those obtained applying a model which includes information on particle shape. The proposed methodology allows us to investigate how the particle shape affects the sedimentation processes. Since the latter is strategic to improve the accuracy on modeling ash fallout, this work will contribute to reduce risks to aviations during explosive eruptions.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Ando_et_al__inpress.pdf7.19 MBAdobe PDFView/Open
Ando_et_al_2010.pdfarticle438.5 kBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

61
checked on Apr 25, 2017

Download(s)

791
checked on Apr 25, 2017

Google ScholarTM

Check

Altmetric