东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

Simulation of pore scale fluid flow of granular ore media in heap leaching based on realistic model

ISSN号：1001-1250
期刊名称：《金属矿山》
时间：0
分类：TP391.41[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术] TE243[石油与天然气工程—油气井工程]
作者机构：[1]Hunan International Economics University, Changsha 410205, China, [2]School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China
相关基金：Projects（50934002, 51074013） supported by the National Natural Science Foundation of China

关键词：流体流动模拟, 有限元模型, 矿石堆浸, 孔隙, 媒体, 颗粒介质, 计算机断层扫描, 粒状, heap leaching, granular ore, fluid flow, image processing, computer simulation

中文摘要：

有不同谷物尺寸的小粒的矿石媒介的二维的图象从 X 光检查被获得计算断层摄影术。与数字图象和有限元素技术处理结合了，原来的灰度图象直接被转变成有限元素模型。由使用这些模型，在粒子之中的毛孔规模液体流动的模拟与 COMSOL Multiphysics，和液体流动速度的分发特征被进行，压力被分析。模拟结果在那里显示出那存在在每小粒的媒介的明显的优先的流动和沥滤的盲目地区。在毛孔喉咙的流动速度比毛孔身体和最大的速度的到达 0.22 m/s 的大。速度从毛孔喉咙和身体的中心逐渐地减少到粒子的表面。当在大多数有更小的谷物尺寸的小粒的媒介的区域的液体流动速度更低时，有更大的谷物尺寸的小粒的媒介的流动路径同等地散布，并且他们中的一些走近到零，因此渗透是很低的。在那里存在某毛孔与不同压力聚类，它是为不平的流动速度分发的基本原因。

英文摘要：

Two-dimensional images of the granular ore media with different grain sizes were obtained from the X-ray computed tomography. Combined with the digital image processing and finite element techniques, the original grayscale images were transformed into the finite element models directly. By using these models, the simulations of pore scale fluid flow among particles were conducted with the COMSOL Multiphysics, and the distribution characteristics of fluid flow velocity and pressure were analyzed. The simulation results show that there exist obvious preferential flow and leaching blind zone in each granular medium. The flow velocity at pore throat is larger than that of pore body and the largest velocity reaches 0.22 m/s. The velocity decreases gradually from the center of pore throat and body to the surface of particles. The flow paths of granular media with larger grain size distribute equally, while the fluid flow velocities in most of areas of granular media with smaller grain size are lower, and some of them approach to zero, so the permeability is very low. There exist some pore clusters with different pressures, which is the basic reason for the uneven flow velocity distribution.

同期刊论文项目