Studies of fluid instabilities in flows of lava and debris

Details Studies of fluid instabilities in flows of lava and debris Studies of fluid instabilities in flows of lava and debris

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..345f&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 345-347 (SEE N87-23341 16-91)

Physics

Geophysics

Chemical Composition, Flow Stability, Lava, Magma, Mars Surface, Mars Volcanoes, Rheology, Debris, Flow Theory, Folds (Geology), Gravitational Effects, Taylor Instability, Viscosity, Volatility, Yield Strength

Scientific paper

At least two instabilities have been identified and utilized in lava flow studies: surface folding and gravity instability. Both lead to the development of regularly spaced structures on the surfaces of lava flows. The geometry of surface folds have been used to estimate the rheology of lava flows on other planets. One investigation's analysis assumed that lava flows have a temperature-dependent Newtonian rheology, and that the lava's viscosity decreased exponentially inward from the upper surface. The author reviews studies by other investigators on the analysis of surface folding, the analysis of Taylor instability in lava flows, and the effect of surface folding on debris flows.

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