Parallel

The parallel function option requires the user to specify the rock/soil grain thermal conductivity. The effective thermal conductivity of the grid-cell then depends on the porosity, saturation states of the fluids, and the thermal conductivity of the fluids. The parallel function is a simple volume-weighted averaging model.

Where ke is the equivalent thermal conductivity tensor (W/m K); ks is the porous media thermal conductivity tensor (W/m K); φ is the diffusive porosity, Sl, Sh, Si, Sn, and Sg are the phase saturations; and kl, kh, ki, kn, and kg are the thermal conductivities of each phase.

If the Rock/Soil name is "IJK Indexing," "JKI Indexing," or "KIJ Indexing," then the value specified will be applied to all nodes in the domain. Alternately, any parameter value can be replaced with an external file.

If the key words 'dp,' 'dual porosity,' or 'fractured' appear in the rock/soil name specified inthe Rock/Soil Zonation Card, this indicates a dual continuum medium and the reading of both matrix and fracture properties (e.g., Fracture and Matrix Intrinsic Permeability) is triggered.

Somerton Model

The Somerton function [1,2] requires the user to specify the dry bulk rock/soil thermal conductivity and the aqueous-wet bulk rock/soil thermal conductivity. The effective thermal conductivity of the grid cell then depends on the aqueous saturation of the grid cell. The grain specific heat refers to the specific heat of the rock/soil grains, not the bulk specific heat.

Where ke is the equivalent thermal conductivity tensor (W/m K); keun equivalent thermal conductivity tensor (unsaturated conditions) (W/m K); and kesat equivalent thermal conductivity tensor (saturated conditions) (W/m K).