The flow dynamics of three-phase magmas: the coupling of rheology and permeability via bubble-particle interactions
三相岩浆的流动动力学:通过气泡-颗粒相互作用耦合流变学和渗透率
基本信息
- 批准号:NE/G014426/1
- 负责人:
- 金额:$ 30万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Fellowship
- 财政年份:2010
- 资助国家:英国
- 起止时间:2010 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Volcanic activity is naturally linked to the flow of molten rock, e.g. the rise of magma from a deep reservoir to the volcano, or the flow of lava down the volcano's flanks. For the assessment of hazards associated with a volcanic eruption, it is of pivotal importance to predict and model flow processes as accurately as possible. A central parameter governing the flow properties of a magma is the gas content of he melt, the amount of crystals and bubbles suspended in the viscous silicate melt, and the degree to which these two phases interact. Accounting for, or neglecting the effect of bubbles and solid particles in eruption models can change their results by the orders of magnitudes, and could make them fatally flawed. Two key issues in volcanology are affected by crystals and bubbles, and their interactions: the bulk flow behaviour of the magma or lava, i.e. its rheology, and the ability of bubbles to connect to a continuous degassing network, i.e. its permeability. The objective of this project is to perform laboratory experiments on three-phase magma-analogue samples, and to quantify the influence of bubble and crystal concentrations on rheology and permeability on the basis of these experiments. This will lead to the formulating of a 'rheological constitutive equation', i.e. an equation that relates suspension properties (e.g. bubble & particle concentration) and external forces (stress) to the resulting sample deformation. This will enable the results to be incorporated into more complex eruption models and to enhance their degree of sophistication and thus their accuracy. The experiments comprise shearing of a liquid-bubble-particle mixture between two concentric cylinders, on of which rotates. A vital part of the study will be the visualization of the interactive processes that occur when such a sample is subject to shear. During the measurement, these processes will be observable through a transparent outer cylinder. After the experiment, flow-induced bubble and particle textures of frozen samples will be accurately characterized under the microscope. The textural data obtained will then be used to reconstruct a 'virtual porous medium' with the same textural properties. For this medium, parameters such as permeability can be calculated numerically. Furthermore, the textures will compared to microtomographic 3D images of natural volcanic rocks from Stromboli volcano. This will allow inferences on shear history and permeability development processes in natural magma. Despite its central importance for many processes in natural sciences, as well as in industrial and commercial settings, the fundamental flow properties of three-phase systems remain largely unexplored. With the project proposed here, I intend to develop the first validated set of constitutive equations for suspensions containing both solid particles and bubbles, and by that hope to contribute a substantial portion towards a refined understanding of these systems.
火山活动自然地与熔融岩石的流动联系在一起,例如岩浆从深处的储层上升到火山,或者熔岩从火山的侧翼流下。在火山喷发灾害评估中,尽可能准确地预测和模拟火山喷发过程是至关重要的。控制岩浆流动特性的一个中心参数是熔体中的气体含量,悬浮在粘性硅酸盐熔体中的晶体和气泡的数量,以及这两相相互作用的程度。考虑或忽略喷发模型中气泡和固体颗粒的影响,可能会使结果发生数量级上的变化,并可能使模型存在致命缺陷。火山学中的两个关键问题受到晶体和气泡及其相互作用的影响:岩浆或熔岩的整体流动行为,即其流变性,以及气泡连接到连续脱气网络的能力,即其渗透性。该项目的目的是对三相岩浆模拟样品进行实验室实验,并在此基础上量化气泡和晶体浓度对流变性和渗透率的影响。这将导致形成“流变本构方程”,即将悬浮特性(例如气泡和颗粒浓度)和外力(应力)与所得样品变形联系起来的方程。这将使结果能够被纳入更复杂的喷发模型,并提高它们的复杂程度,从而提高它们的准确性。实验包括两个同心圆柱体之间的液体-气泡-颗粒混合物的剪切,其中一个圆柱体旋转。研究的一个重要部分将是可视化的交互过程,发生时,这样的样品受到剪切。在测量过程中,这些过程将通过一个透明的外圆柱体观察到。实验结束后,冷冻样品的流致气泡和颗粒织构将在显微镜下精确表征。获得的纹理数据将用于重建具有相同纹理属性的“虚拟多孔介质”。对于这种介质,渗透率等参数可以通过数值计算得到。此外,纹理将与Stromboli火山天然火山岩的显微层析3D图像进行比较。这将有助于推断天然岩浆的剪切历史和渗透性发展过程。尽管它在自然科学以及工业和商业环境中的许多过程中具有核心重要性,但三相系统的基本流动特性在很大程度上仍未被探索。在这里提出的项目中,我打算为包含固体颗粒和气泡的悬浮液开发第一套经过验证的本构方程,并希望以此为对这些系统的精确理解做出实质性的贡献。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The rheology of three-phase suspensions at low bubble capillary number.
- DOI:10.1098/rspa.2014.0557
- 发表时间:2015-01-08
- 期刊:
- 影响因子:0
- 作者:Truby JM;Mueller SP;Llewellin EW;Mader HM
- 通讯作者:Mader HM
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Sebastian Mueller其他文献
A decision point between transdifferentiation and programmed cell death priming controls KRAS-dependent pancreatic cancer development
转分化和程序性细胞死亡启动之间的决策点控制 KRAS 依赖性胰腺癌的发展
- DOI:
10.1038/s41467-025-56493-7 - 发表时间:
2025-02-19 - 期刊:
- 影响因子:15.700
- 作者:
Anne T. Schneider;Christiane Koppe;Emilie Crouchet;Aristeidis Papargyriou;Michael T. Singer;Veronika Büttner;Leonie Keysberg;Marta Szydlowska;Frank Jühling;Julien Moehlin;Min-Chun Chen;Valentina Leone;Sebastian Mueller;Thorsten Neuß;Mirco Castoldi;Marina Lesina;Frank Bergmann;Thilo Hackert;Katja Steiger;Wolfram T. Knoefel;Alex Zaufel;Jakob N. Kather;Irene Esposito;Matthias M. Gaida;Ahmed Ghallab;Jan G. Hengstler;Henrik Einwächter;Kristian Unger;Hana Algül;Nikolaus Gassler;Roland M. Schmid;Roland Rad;Thomas F. Baumert;Maximilian Reichert;Mathias Heikenwalder;Vangelis Kondylis;Mihael Vucur;Tom Luedde - 通讯作者:
Tom Luedde
Effect of particle insertion on Poly(3-hexylthiophene) brush’s π-π stacking
粒子插入对聚(3-己基噻吩)刷π-π堆积的影响
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:3.3
- 作者:
S. Pantawane;Sebastian Mueller;S. Gekle - 通讯作者:
S. Gekle
Clinical and ultrastructural results after denudation of the posterior stroma for an autologous descemet membrane endothelial keratoplasty in the fellow eye.
对侧眼自体后弹力层内皮角膜移植术后基质剥脱后的临床和超微结构结果。
- DOI:
10.1097/ico.0000000000000083 - 发表时间:
2014 - 期刊:
- 影响因子:2.8
- 作者:
Sebastian Mueller;K. Bartz;Efdal Yoeruek - 通讯作者:
Efdal Yoeruek
SAT-327 - Accuracy of spleen stiffness measurement for the diagnosis of clinically significant portal hypertension in patients with advanced chronic liver disease: an individual patient meta-analysis
- DOI:
10.1016/s0168-8278(23)00867-x - 发表时间:
2023-06-01 - 期刊:
- 影响因子:
- 作者:
Elton Dajti;Federico Ravaioli;Romanas Zykus;Laure Elkrief;Pierre-Emmanuel Rautou;Ivica Grgurevic;Horia Stefanescu;Masashi Hirooka;Fraquelli Mirella;Matteo Rosselli;Jason Pik Eu Chang;Alberto Borghi;Thomas Reiberger;Elba Llop;Sebastian Mueller;Giovanni Marasco;Annalisa Berzigotti;Agostino Colli;Davide Festi;Antonio Colecchia - 通讯作者:
Antonio Colecchia
Integrated hazardous materials management: Combining requirements from various environmental legislations to enable effective business compliance processes in industries
- DOI:
10.1007/s40684-015-0035-6 - 发表时间:
2015-07-10 - 期刊:
- 影响因子:5.600
- 作者:
Robert Miehe;Sebastian Mueller;Ralph Schneider;Sylvia Wahren;Markus Hornberger - 通讯作者:
Markus Hornberger
Sebastian Mueller的其他文献
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