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- W3021167953 abstract "We analyze a two-phase porous medium whose permeability and solid viscosity are dependent on porosity. It has been established experimentally and numerically that when such a medium is subjected to shear, the porosity rearranges into stripes of high and low porosity known as melt bands (Holtzman et al., 2003; Katz et al., 2006; Butler, 2009). This study uses linear theory and numerical simulations to analyze the effect of ongoing melting and buoyancy forces on the formation and evolution of melt bands. Previously, the consequences of internal melting have not been quantified and studies including buoyancy forces have conflicting interpretations (Katz, 2010; Butler, 2009). In this study, we show that the inclusion of internal melting significantly decreases the amplitude of these bands if the bulk viscosity is constant, but has a minimal effect on the amplitude when the bulk viscosity decreases with porosity. Most recent studies indicate that bulk viscosity likely strongly decreases with porosity, indicating that ongoing melting does not preclude the existence of significant melt bands in Earth's upper mantle. Buoyancy forces are shown to induce an oscillation of the bands with no effect on amplitude. We also show that isotropic expansion driven by melting and density differences between the solid and liquid can drive a porosity localizing instability." @default.
- W3021167953 created "2020-05-13" @default.
- W3021167953 creator A5082277394 @default.
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- W3021167953 date "2020-07-01" @default.
- W3021167953 modified "2023-09-27" @default.
- W3021167953 title "Effects of ongoing melting and buoyancy on melt band evolution in a compacting porous layer" @default.
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- W3021167953 doi "https://doi.org/10.1016/j.pepi.2020.106485" @default.
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