Effect of Reactive Surface Areas Associated with Different Particle Shapes on Chemical-Dissolution Front Instability in Fluid-Saturated Porous Rocks
Effect of Reactive Surface Areas Associated with Different Particle Shapes on Chemical-Dissolution Front Instability in Fluid-Saturated Porous Rocks
复制标题
与不同颗粒形状相关的反应表面积对流体饱和多孔岩石中化学溶解前沿不稳定性的影响
DOI：
10.1007/s11242-007-9162-z
复制
发表时间：
2008-05
影响因子：
2.7
通讯作者：
赵崇斌
中科院分区：
文献类型：
--
作者：
赵崇斌
本文通过解析推导球形和立方体颗粒组成的两种理想多孔介质中孔隙率、孔隙流体流动和反应性化学物质输运耦合系统的无量纲孔隙流体压力梯度，研究了不同颗粒形状的反应性表面积对流体饱和多孔介质中反应性渗流不稳定性的影响。与耦合系统的临界无因次孔隙流体压力梯度相比，导出的无因次孔隙流体压力梯度可用于评价流体饱和多孔介质中化学溶解前缘的不稳定性。相关理论分析表明：（1）由于球形颗粒的形状系数大于立方颗粒的形状系数，因此由球形颗粒组成的化学体系比由立方颗粒组成的化学体系更不稳定;（2）由不规则颗粒组成的天然多孔介质的不稳定可能性小于理想化多孔介质的不稳定可能性，其由规则的球形颗粒组成。为了模拟化学溶解体系进入超临界状态时化学溶解前沿的复杂形态演化，提出了一种求解此类问题的数值方法。相关的数值结果表明，与不同的颗粒形状的反应表面积可以有显着的影响的形态演化的不稳定的化学溶解前流体饱和的多孔岩石。
In this article, the effect of reactive surface areas associated with different particle shapes on the reactive infiltration instability in a fluid-saturated porous medium is investigated through analytically deriving the dimensionless pore-fluid pressure-gradient of a coupled system between porosity, pore-fluid flow and reactive chemical-species transport within two idealized porous media consisting of spherical and cubic grains respectively. Compared with the critical dimensionless pore-fluid pressure-gradient of the coupled system, the derived dimensionless pore-fluid pressure-gradient can be used to assess the instability of a chemical dissolution front within the fluid-saturated porous medium. The related theoretical analysis has demonstrated that (1) since the shape coefficient of spherical grains is greater than that of cubic grains, the chemical system consisting of spherical grains is more unstable than that consisting of cubic grains, and (2) the instability likelihood of a natural porous medium, which is comprised of irregular grains, is smaller than that of an idealized porous medium, which is comprised of regular spherical grains. To simulate the complicated morphological evolution of a chemical dissolution front in the case of the chemical dissolution system becoming supercritical, a numerical procedure is proposed for solving this kind of problem. The related numerical results have demonstrated that the reactive surface area associated with different particle shapes can have a significant influence on the morphological evolution of an unstable chemical-dissolution front within fluid-saturated porous rocks.
登录
查看更多内容
DOI：
10.1007/978-1-4612-0575-3_12
发表时间：
1998
期刊：
--
影响因子：
--
作者：
B. Reddy
通讯作者：
B. Reddy
DOI：
10.1007/978-0-387-76543-3_4
发表时间：
2008
期刊：
--
影响因子：
--
作者：
B. Straughan
通讯作者：
B. Straughan
影响因子：
1.2
作者：
P. Gow;P. Upton;C. Zhao;K. Hill
通讯作者：
P. Gow;P. Upton;C. Zhao;K. Hill
影响因子：
7.4
作者：
E. C. Childs
通讯作者：
E. C. Childs
影响因子：
1.6
作者：
Chong-bin Zhao;B. Hobbs;H. Muhlhaus;A. Ord;G. Lin
通讯作者：
Chong-bin Zhao;B. Hobbs;H. Muhlhaus;A. Ord;G. Lin