Viscous fingering with partially miscible fluids
Journal Article
·
· Physical Review Fluids (Online)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); none
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Technical University of Madrid (Spain)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Viscous fingering—the fluid-mechanical instability that takes place when a low-viscosity fluid displaces a high-viscosity fluid—has traditionally been studied under either fully miscible or fully immiscible fluid systems. In this work, we study the impact of partial miscibility (a common occurrence in practice) on the fingering dynamics. Through a careful design of the thermodynamic free energy of a binary mixture, we develop a phase-field model of fluid-fluid displacements in a Hele-Shaw cell for the general case in which the two fluids have limited (but nonzero) solubility into one another.We show, bymeans of high-resolution numerical simulations, that partial miscibility exerts a powerful control on the degree of fingering: fluid dissolution hinders fingering while fluid exsolution enhances fingering. Additionally, we show that, as a result of the interplay between compositional exchange and the hydrodynamic pattern-forming process, stronger fingering promotes the system to approach thermodynamic equilibrium more quickly.
- Research Organization:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FE0013999; SC0018357
- OSTI ID:
- 1505589
- Alternate ID(s):
- OSTI ID: 1398732
- Journal Information:
- Physical Review Fluids (Online), Journal Name: Physical Review Fluids (Online) Journal Issue: 10 Vol. 2; ISSN 2469-990X
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Viscous Fingering of Miscible Liquids in Porous and Swellable Media for Rapid Diagnostic Tests
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journal | October 2018 |
Well-Posedness of a Diffuse Interface model for Hele-Shaw Flows
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journal | December 2019 |
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