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Title: Influence of heterogeneity on second-kind self-similar solutions for viscous gravity currents

Journal Article · · Journal of Fluid Mechanics
DOI:https://doi.org/10.1017/jfm.2014.148· OSTI ID:1200619
 [1]; ORCiD logo [2];  [1]
  1. Princeton Univ., NJ (United States)
  2. Princeton Univ., NJ (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We report experimental, theoretical and numerical results on the effects of horizontal heterogeneities on the propagation of viscous gravity currents. We use two geometries to highlight these effects: (a) a horizontal channel (or crack) whose gap thickness varies as a power-law function of the streamwise coordinate; (b) a heterogeneous porous medium whose permeability and porosity have power-law variations. We demonstrate that two types of self-similar behaviours emerge as a result of horizontal heterogeneity: (a) a first-kind self-similar solution is found using dimensional analysis (scaling) for viscous gravity currents that propagate away from the origin (a point of zero permeability); (b) a second-kind self-similar solution is found using a phase-plane analysis for viscous gravity currents that propagate toward the origin. These theoretical predictions, obtained using the ideas of self-similar intermediate asymptotics, are compared with experimental results and numerical solutions of the governing partial differential equation developed under the lubrication approximation. All three results are found to be in good agreement.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1200619
Report Number(s):
LA-UR-13-29555
Journal Information:
Journal of Fluid Mechanics, Vol. 747, Issue 1; ISSN 0022-1120
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (7)

Flow regimes for fluid injection into a confined porous medium journal February 2015
Healing capillary films journal January 2018
Shock formation in two-layer equal-density viscous gravity currents journal January 2019
The effects of fluid transport on the creation of a dense cluster of activated fractures in a porous medium journal May 2018
Dispersive entrainment into gravity currents in porous media journal January 2020
Viscous fluid injection into a confined channel journal June 2015
A 3D Numerical Study of Interface Effects Influencing Viscous Gravity Currents in a Parabolic Fissure, with Implications for Modeling with 1D Nonlinear Diffusion Equations journal May 2019

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