Mechanical Properties Description (G)
A number of material properties of the porous medium are specified in the Mechanical Properties Card.
Particle Density
Particle Density represents the rock grain density. This value will default to 2650 kg/m3 by using a null entry for both the particle density and its associated units.
Porosity
Total porosity and diffusive porosity are specified in this card. Total porosity refers to total connected and unconnected pore volumes and diffusive porosity refers to only the connected pore volume. It is common to use the same value for both porosities.
Compressibility
Geologic media in STOMP is considered to be slightly compressible. Compressibility is considered to be an intrinsic property of a rock/soil type. Compressibility can be specified either as Bulk Compressibility, Pore Compressibility or Specific Storage.
Tortuosity
Tortuosity functions are required for simulations that involve solute transport or diffusion of components through phases (e.g., water vapor diffusing through the gas phase or dissolved oil diffusing through the aqueous phase). Tortuosities can be computed either as constants, which require input values, or as functions of the phase saturation and diffusive porosity.