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Automated contact angle estimation for three-dimensional X-ray microtomography data

Journal Article · · Advances in Water Resources
 [1];  [1];  [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. The Pennsylvania State Univ., University Park, PA (United States)

Multiphase flow in capillary regimes is a fundamental process in a number of geoscience applications. The ability to accurately define wetting characteristics of porous media can have a large impact on numerical models. In this paper, a newly developed automated three-dimensional contact angle algorithm is described and applied to high-resolution X-ray microtomography data from multiphase bead pack experiments with varying wettability characteristics. The algorithm calculates the contact angle by finding the angle between planes fit to each solid/fluid and fluid/fluid interface in the region surrounding each solid/fluid/fluid contact point. Results show that the algorithm is able to reliably compute contact angles using the experimental data. The in situ contact angles are typically larger than flat surface laboratory measurements using the same material. Furthermore, wetting characteristics in mixed-wet systems also change significantly after displacement cycles.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1333532
Alternate ID(s):
OSTI ID: 1327444
Report Number(s):
SAND--2014-20579J; PII: S0309170815002651
Journal Information:
Advances in Water Resources, Journal Name: Advances in Water Resources Journal Issue: C Vol. 95; ISSN 0309-1708
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Micro‐computed tomography for the investigation of stationary liquid–liquid and liquid–gas interfaces in capillaries journal December 2019
Modeling Oil Recovery in Mixed-Wet Rocks: Pore-Scale Comparison Between Experiment and Simulation journal November 2018
Spatial Correlation of Contact Angle and Curvature in Pore-Space Images journal September 2018
Validation of model predictions of pore-scale fluid distributions during two-phase flow journal May 2018