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- Title
Slip Backflow of Polymers in Elastic Fractures for Subsurface Heat Recovery.
- Authors
Lenci, Alessandro; Zeighami, Farhad; Daprà, Irene; Di Federico, Vittorio
- Abstract
This research delves into the complexities of backflow phenomena in finite-length and flat-walled fractures with elastic walls, specifically focusing on power-law fluids, whose shear-thinning behavior distinguishes them from Newtonian fluids. We model the backflow process under the lubrication approximation and by incorporating the linear Navier slip law. We numerically examine the influence of parameters such as slip length, fluid rheology, and external pressure on the backflow propagation of the carrier fluid. Our findings underscore the significant role played by the rheological index in determining the fracture closure rate. Additionally, our investigations highlight the marked effect of external pressure variations on pressure distribution within the fracture. Notably, the friction coefficient at the fracture walls, as denoted by a dimensionless slip number, exhibits limited influence on the fundamental dynamics of the problem. These insights advance our understanding of power-law fluid backflow and have wide-ranging applications across various engineering disciplines.
- Subjects
PSEUDOPLASTIC fluids; NEWTONIAN fluids; HEAT recovery; DIMENSIONLESS numbers; YIELD stress; POLYMERS; RHEOLOGY
- Publication
Energies (19961073), 2023, Vol 16, Issue 24, p7999
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en16247999