R
Ryan T. Armstrong
Researcher at University of New South Wales
Publications - 176
Citations - 5455
Ryan T. Armstrong is an academic researcher from University of New South Wales. The author has contributed to research in topics: Porous medium & Multiphase flow. The author has an hindex of 36, co-authored 149 publications receiving 3764 citations. Previous affiliations of Ryan T. Armstrong include Oregon State University & Royal Dutch Shell.
Papers
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Journal ArticleDOI
From connected pathway flow to ganglion dynamics
M. Rücker,M. Rücker,Steffen Berg,Ryan T. Armstrong,A. Georgiadis,Holger Ott,Alexander G. Schwing,R. Neiteler,Niels Brussee,A. Makurat,Leon Leu,Leon Leu,Martin Wolf,Faisal Khan,Frieder Enzmann,Michael Kersten +15 more
TL;DR: In this paper, a fast synchrotron-based X-ray computed microtomography was used to image the dynamic transient process in a sandstone rock using fast Synchro-R-Xray computed tomography.
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Porosity and permeability characterization of coal: A micro-computed tomography study
Hamed Lamei Ramandi,Peyman Mostaghimi,Ryan T. Armstrong,Mohammad Saadatfar,W. Val Pinczewski +4 more
TL;DR: In this article, a unique contrast agent technique using X-ray micro-computed tomography (micro-CT) was developed for studying micrometer-sized features in coal, which allows for the visualization of coal fractures not visible with conventional imaging methods.
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Beyond Darcy's law: The role of phase topology and ganglion dynamics for two-fluid flow
TL;DR: The results suggest that the role of fluid connectivity cannot be ignored for multiphase flow and show that fluid topology can undergo substantial changes during flow at constant saturation, which is one of the underlying causes of hysteretic behavior.
Journal ArticleDOI
Interfacial velocities and capillary pressure gradients during Haines jumps.
Ryan T. Armstrong,Steffen Berg +1 more
TL;DR: It is found that pore drainage events are cooperative, meaning that capillary pressure differences which extend over multiple pores directly affect fluid topology and menisci dynamics and suggests that not only viscous forces but also capillarity acts in a nonlocal way.
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Linking pore-scale interfacial curvature to column-scale capillary pressure
TL;DR: In this article, the authors compared curvature-based and transducer-based measurements when connected phase interfaces are considered and showed that curvature measurements show a strong dependence on whether an interface is formed by connected or disconnected fluid and the time allowed for equilibration.