Lattice Boltzmann Simulation of Fluid Flow Characteristics in a Rock Micro-Fracture Based on the Pseudo-Potential Model

Pengyu Wang, Zhiliang Wang, Linfang Shen and Libin Xin
Additional contact information
Pengyu Wang: Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China
Zhiliang Wang: Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China
Linfang Shen: Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China
Libin Xin: Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China

Energies, 2018, vol. 11, issue 10, 1-14

Abstract: Slip boundary has an important influence on fluid flow, which is non-negligible in rock micro-fractures. In this paper, an improved pseudo-potential multi-relaxation-time (MRT) lattice Boltzmann method (LBM), which can achieve a large density ratio, is introduced to simulate the fluid flow in a micro-fracture. The model is tested to satisfy thermodynamic consistency and simulate Poiseuille flow in the case of large liquid-gas density ratio. The slip length is used as an index for evaluating the flow characteristics, and the effects of wall wettability, micro-fracture width, driving pressure and liquid-gas density ratio on the slip length are discussed. The results demonstrate that the slip length increases significantly with the increase of the wall contact angle in rock micro-fracture. And the liquid-gas density ratio has an important impact on the slip length, especially for the hydrophobic wall. Moreover, under the laminar flow regime the driving pressure and the micro-fracture width has little effect on the slip length.

Keywords: slip length; large density ratio; contact angle; pseudo-potential model; lattice Boltzmann method; micro-fracture (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/10/2576/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/10/2576/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:10:p:2576-:d:172377

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().