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ERE Seminar: Ilenia Battiato, Dept of Energy Resources Engineering — Energy-based Upscaling of Immiscible Two-phase Flow in Porous Media: Flow Regimes and Applicability Conditions

Date and Time: 
October 9, 2017 -
12:30pm to 1:30pm
Location: 
Room 104, Green Earth Sciences Building, 367 Panama Street, Stanford
Contact Email: 
erutherford@stanford.edu
Contact Phone: 
6507236849
Event Sponsor: 
Energy Resources Engineering

 

Energy-based Upscaling of Immiscible Two-phase Flow in Porous Media: Flow Regimes and Applicability Conditions

Ilenia Battiato
Assistant Professor, Dept of Energy Resources Engineering
Stanford University


Empirical or theoretical extensions of Darcy’s law for immiscible two-phase flow have shown significant limitations in properly modelling the flow at the continuum-scale. We tackle this problem by proposing a set of upscaled equations based on pore-scale flow regimes, i.e., the topology of flowing phases. The incompressible Navier-Stokes equation is upscaled by means of multi-scale expansions and its closures derived from the mechanical energy balance for different flow regimes at the pore-scale. We also derive the applicability conditions of the upscaled equations based on the order of magnitude of relevant dimensionless numbers, i.e., Eotvos, Reynolds, Capillary, Froude numbers, and the viscosity and density ratio of the system. We demonstrate that the classical two-phase Darcy law is recovered for a limited range of operative conditions and it is compatible only with the connected-pathway flow regime, while additional terms accounting for interfacial and wall interactions should be incorporated to model accurately ganglia or drop traffic flow.