| Using Digital Imaging to Characterize Threshold Dynamic Parameters in Porous Media Based on Lattice Boltzmann Method |
| |
| 摘 要： | Digital images (DI) and lattice Boltzmann method (LBM) are used to characterize the threshold dynamic parameters of porous media. Two-dimensional representations of the porous structure are reconstructed from segmentation of digital images obtained from a series of tiny samples. The threshold pressure gradients and threshold Péclet numbers are researched on seven test samples by using LBM. Numerical results are in agreement with that obtained by integrating Darcy’s law. The results also indicate that fluids can flow through porous media only if the fluid force is large enough to overcome threshold pressure gradient in porous media. One synthetic case is used to further illustrate the applicability of the proposed technique. In addition, the dynamical rules in our model are local, therefore it can be run on parallel computers with well computational efficiency.
|
| 关 键 词： | 数字成像 波尔兹曼网格法 多孔介质 下限压力 LBM 流体力学 |
Using Digital Imaging to Characterize Threshold Dynamic Parameters in Porous Media Based on Lattice Boltzmann Method |
| |
| XU You-Sheng,LIU Yang,HUANG Guo-Xiang. Using Digital Imaging to Characterize Threshold Dynamic Parameters in Porous Media Based on Lattice Boltzmann Method[J]. Chinese Physics Letters, 2004, 21(12): 2454-2458 |
| |
| Authors: | XU You-Sheng LIU Yang HUANG Guo-Xiang |
| |
| Affiliation: | Department of Physics, Zhejiang Normal University, Jinhua 321004 Department of Physics, East China Normal University, Shanghai 200062 Department of Mechanical Engineering, The Hongkong Polytechnic University, Hunghom, Kowloon, Hongkong |
| |
| Abstract: | |
| |
| Keywords: | 47.55.Mh 03.40.Kf 02.70.-c |
|
| 点击此处可从《中国物理快报》浏览原始摘要信息 |
|
点击此处可从《中国物理快报》下载免费的PDF全文 |
