Physics – Fluid Dynamics
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987e%26psl..84..339k&link_type=abstract
Earth and Planetary Science Letters, Volume 84, Issue 2-3, p. 339-344.
Physics
Fluid Dynamics
5
Scientific paper
The mixing of mafic and silicic magmas in a squeezed conduit is simulated by fluid dynamics experiments using glue and dilute glycerin in a squeezed vinyl tube. Lighter and more viscous glue initially stably overlies dilute glycerin in a tube. As the tube is squeezed downward by a roller, the glue and dilute glycerin axisymmetrically circulate in the tube. The stable density stratification overturns due to the circulative motion. Because of viscosity contrast between the two liquids, the convective motion becomes unsteady and chaotic, which leads to efficient mixing of two liquids, even when the tube is squeezed very slowly. It is suggested that magma mixing in a squeezed conduit may explain some occurrences of natural mixed lavas with nearly homogeneous groundmass.
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