Experimental Rheometry of Magmatic Multiphase Suspensions

9614376 Spera本研究将研究多相硅酸盐岩浆固-液悬浮液和气-液乳状液的流变学，作为剪切速率、温度和分散相体积分数的函数。 具体的实验包括粘度测量的乳液中的气泡在熔融钠长石在高达40体积%的蒸汽和人工创建的悬浮液中的透辉石晶体与钙长石透辉石二元熔体在高达40体积%的固体平衡。 多相岩浆系统的流动特性的权威性实验研究仍然相当缺乏，从拟议的实验中获得的结果将导致可衡量的进展，我们理解这些材料的复杂流变性质。 如果我们要了解岩浆系统的动力学及其造成的自然危害，这是必不可少的。

9614376 Spera This research will examine the rheology of multiphase silicate magmatic solid-liquid suspensions and gas-liquid emulsions as a function of shear rate, temperature, and disperse-phase volume fraction. Specific experiments include viscometric measurements of emulsions of air bubbles in molten albite at up to 40 volume percent vapor and of artificially-created suspensions of diopside crystals in equilibrium with anorthite-diopside binary melts at up to 40 volume percent solids. Authoritative experimental studies of the flow properties of multiphase magmatic systems remain quite scarce, and results obtained from the proposed experiments will lead to measurable progress in our comprehension of the complex rheological nature of these materials. This is essential if we are to understand the dynamics of magmatic systems and the natural hazards they pose.