Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635637 | Transactions of Nonferrous Metals Society of China | 2016 | 7 Pages |
Abstract
Magnetic resonance imaging (MRI) was used to probe the structure and flow velocity within the interparticle space of a packed bed of agar beads under water-saturated condition. The images of the velocity field at three different flow rates were obtained. To determine the pore-parameter of the porous media, the internal structure of the bed was also obtained using image processing technique. The results show that the porosity of the sample is 31.28% and the fitting curve for the distribution of pore equivalent diameter follows Gaussian distribution. The velocity profiles do shift as the flow rate varies and the solution flow through the void space is not a homogeneous flow in any pores. The velocity distributions within the pore are roughly parabolic with the local maximum being near the center. About half of the velocity components are in the class of 0-1 cm/s. The frequency of lower velocity components is lower at higher flow rate, but to higher velocity components, it is just the opposite.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Ai-xiang WU, Chao LIU, Sheng-hua YIN, Zhen-lin XUE, Xun CHEN,