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Title: Modeling variability in porescale multiphase flow experiments

Journal Article · · Advances in Water Resources
 [1];  [2];  [2];  [3];  [2]
  1. University of California San Diego, San Diego, CA (United States); San Diego State University, San Diego, CA (United States)
  2. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  3. Stanford University, Stanford, CA (United States)

Microfluidic devices and porescale numerical models are commonly used to study multiphase flow in biological, geological, and engineered porous materials. In this work, we perform a set of drainage and imbibition experiments in six identical microfluidic cells to study the reproducibility of multiphase flow experiments. We observe significant variations in the experimental results, which are smaller during the drainage stage and larger during the imbibition stage. We demonstrate that these variations are due to sub-porescale geometry differences in microcells (because of manufacturing defects) and variations in the boundary condition (i.e., fluctuations in the injection rate inherent to syringe pumps). Computational simulations are conducted using commercial software STAR-CCM+, both with constant and randomly varying injection rates. Here, stochastic simulations are able to capture variability in the experiments associated with the varying pump injection rate.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Science Foundation (NSF)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1418474
Alternate ID(s):
OSTI ID: 1398635
Journal Information:
Advances in Water Resources, Vol. 105, Issue C; ISSN 0309-1708
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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