Capillary Pressure Simulation


Simulate capillary pressure directly on CT scans of different materials (e.g., porous or composite materials) using the Capillary Pressure Module, which is part of Transport Phenomena Simulation Module for VGSTUDIO MAX.

Simulation of Capillary Pressure

The simulation of capillary pressure can be used to determine characteristics of scanned porous materials, for example in geosciences to characterize soil and rock samples. 

The Capillary Pressure Module: 

  • Computes quantities like the pore size distribution and the capillary pressure drainage curve for a scanned porous material sample.
  • Works directly on voxel data and makes use of the sub-voxel accurate, local adaptive surface determination in VGSTUDIO MAX.

Pore Size Distribution

The pore size distribution is calculated using the approach of maximal inscribed spheres. The software uses spheres of varying size as probes and attempts to fit them into the pore space. For each point, the largest fitting sphere overlapping this point is found. The diameter of that sphere is assigned to this point as the local pore diameter.

Three different test setups can be mimicked by defining the reservoir boundaries for WP and NWP according to the casesa) Tempe cell, b) porous plate setup, and c) mercury injection experiment.
Pore diameter
Isolated pore space
Non-wetting phase front
Trapped wetting phase
The pore size is shown as a histogram plot.