Sponsor
This work was partially supported by the Rose Hills Foundation 825 SURF at UC Berkeley and the National Science Foundation.
Published In
Journal of Volcanology and Geothermal Research
Document Type
Post-Print
Publication Date
2-21-2015
Subjects
Mud volcanoes -- Italy -- Stromboli, Magmatism -- Italy -- Stromboli, Mud volcanoes -- California -- Salton Sea
Abstract
The rheology of particle-laden fluids with a yield stress, such as mud or crystal-rich magmas, controls the mobility of bubbles, both the size needed to overcome the yield stress and their rise speed. We experimentally measured the velocities of bubbles and rigid spheres in mud sampled from the Davis-Schrimpf mud volcanoes adjacent to the Salton Sea, Southern California. Combined with previous measurements in the polymer gel Carbopol, we obtained an empirical model for the drag coefficient and bounded the conditions under which bubbles overcome the yield stress. Yield stresses typical of mud and basaltic magmas with sub-mm particles can immobilize millimeter to centimeter sized bubbles. At Stromboli volcano, Italy, a vertical yield stress gradient in the shallow conduit may immobilize bubbles with diameter . 1 cm and hinder slug coalescence.
DOI
10.1016/j.jvolgeores.2015.02.004
Persistent Identifier
http://archives.pdx.edu/ds/psu/14426
Citation Details
Tran, Aaron, Rudolph, Maxwell L., Manga, Michael, Bubble mobility in mud and magmatic volcanoes, Journal of Volcanology and Geothermal Research (2015), doi: 10.1016/j.jvolgeores.2015.02.004
Description
This is the author’s version of a work that was accepted for publication in Journal of Volcanology and Geothermal Research. Changes resulting from the publishing process, such as editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document.
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