Simulation Analysis on Water’s Micro Seepage Laws under Different Pressure Gradients Using Computed Tomography Method
Joint Authors
Zhou, Gang
Qiu, Lei
Zhang, Wenzheng
Xue, Jiao
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-26, 26 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-09-06
Country of Publication
Egypt
No. of Pages
26
Main Subjects
Abstract EN
The aim of this paper was to develop a model that can characterize the actual micropore structures in coal and gain an in-depth insight into water’s seepage rules in coal pores under different pressure gradients from a microscopic perspective.
To achieve this goal, long-flame coals were first scanned by an X-ray 3D microscope; then, through a representative elementary volume (REV) analysis, the optimal side length was determined to be 60 μm; subsequently, by using Avizo software, the coal’s micropore structures were acquired.
Considering that the porosity varies in the same coal sample, this study selected four regions in the sample for an in-depth analysis.
Moreover, numerical simulations on water’s seepage behaviors in coal under 30 different pressure gradients were performed.
The results show that (1) the variation of the simulated seepage velocity and pressure gradient accorded with Forchheimer’s high-velocity nonlinear seepage rules; (2) the permeability did not necessarily increase with the increase of the effective porosity; (3) in the same model, under different pressure gradients, the average seepage pressure decreased gradually, while the average seepage velocity and average mass flow varied greatly with the increase of the seepage length; and (4) under the same pressure gradient, the increase of the average mass flow from the inlet to the outlet became more significant under a higher inlet pressure.
American Psychological Association (APA)
Zhou, Gang& Qiu, Lei& Zhang, Wenzheng& Xue, Jiao. 2018. Simulation Analysis on Water’s Micro Seepage Laws under Different Pressure Gradients Using Computed Tomography Method. Advances in Civil Engineering،Vol. 2018, no. 2018, pp.1-26.
https://search.emarefa.net/detail/BIM-1115837
Modern Language Association (MLA)
Zhou, Gang…[et al.]. Simulation Analysis on Water’s Micro Seepage Laws under Different Pressure Gradients Using Computed Tomography Method. Advances in Civil Engineering No. 2018 (2018), pp.1-26.
https://search.emarefa.net/detail/BIM-1115837
American Medical Association (AMA)
Zhou, Gang& Qiu, Lei& Zhang, Wenzheng& Xue, Jiao. Simulation Analysis on Water’s Micro Seepage Laws under Different Pressure Gradients Using Computed Tomography Method. Advances in Civil Engineering. 2018. Vol. 2018, no. 2018, pp.1-26.
https://search.emarefa.net/detail/BIM-1115837
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1115837