Some Problems Connected with the Use of Classical Description of Fluid/Fluid Displacement Processes

1972 ◽  
pp. 229-240 ◽  
Author(s):  
Walter D. Rose
Keyword(s):  
Fluid Displacement ◽  
Classical Description ◽  
Displacement Processes

Capillary-Dominated Fluid Displacement in Porous Media

2019 ◽  
Vol 51 (1) ◽  
pp. 429-449 ◽  
Author(s):  
Kamaljit Singh ◽  
Michael Jung ◽  
Martin Brinkmann ◽  
Ralf Seemann
Keyword(s):  
Porous Media ◽  
Pore Space ◽  
Contact Angles ◽  
Pore Scale ◽  
Fluid Displacement ◽  
Invasion Pattern ◽  
Theoretical Considerations ◽  
Displacement Processes ◽  
Synchrotron Microtomography ◽  
Relevant Material

Liquid invasion into a porous medium is a phenomenon of great importance in both nature and technology. Despite its enormous importance, there is a surprisingly sparse understanding of the processes occurring on the scale of individual pores and of how these processes determine the global invasion pattern. In particular, the exact influence of the wettability remains unclear besides the limiting cases of very small or very large contact angles of the invading fluid. Most quantitative pore-scale experiments and theoretical considerations have been conducted in effectively two-dimensional (2D) micromodels and Hele–Shaw geometries. Although these pioneering works helped to unravel some of the physical aspects of the displacement processes, the relevance of 2D models has not always been appreciated for natural porous media. With the availability of X-ray microtomography, 3D imaging has become a standard for exploring pore-scale processes in porous media. Applying advanced postprocessing routines and synchrotron microtomography, researchers can image even slow flow processes in real time and extract relevant material parameters like the contact angle from the interfaces in the pore space. These advances are expected to boost both theoretical and experimental understanding of pore-scale processes in natural porous media.

Pore-Scale Visualisation of Two-Phase Fluid Displacement Processes in a Carbonate Rock using X-ray micro-TomographyTechnique

2013 ◽  
Author(s):  
Tannaz Pak ◽  
Ian Butler ◽  
Sebastian Geiger ◽  
Marinus I.J. van Dijke ◽  
Zeyun Jiang ◽  
...  
Keyword(s):  
Carbonate Rock ◽  
Pore Scale ◽  
Two Phase ◽  
X Ray ◽  
Fluid Displacement ◽  
Displacement Processes ◽  
Phase Fluid

SEMI-CLASSICAL DESCRIPTION OF HOT ZONE DECAY

1987 ◽  
Vol 48 (C2) ◽  
pp. C2-211-C2-214
Author(s):  
J. N. DE ◽  
C. GREGOIRE
Keyword(s):  
Classical Description ◽  
Hot Zone

scholarly journals Classical description of the parameter space geometry in the Dicke and Lipkin-Meshkov-Glick models

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Diego Gonzalez ◽  
Daniel Gutiérrez-Ruiz ◽  
J. David Vergara
Keyword(s):  
Parameter Space ◽  
Classical Description ◽  
Space Geometry

scholarly journals Horndeski genesis: consistency of classical theory

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Yulia Ageeva ◽  
Pavel Petrov ◽  
Valery Rubakov
Keyword(s):  
Strong Coupling ◽  
Dimensional Analysis ◽  
Classical Theory ◽  
Arbitrary Order ◽  
Specific Model ◽  
Power Counting ◽  
Coupling Energy ◽  
Classical Description ◽  
Higher Order Terms ◽  
The Universe

Abstract Genesis within the Horndeski theory is one of possible scenarios for the start of the Universe. In this model, the absence of instabilities is obtained at the expense of the property that coefficients, serving as effective Planck masses, vanish in the asymptotics t → −∞, which signalizes the danger of strong coupling and inconsistency of the classical treatment. We investigate this problem in a specific model and extend the analysis of cubic action for perturbations (arXiv:2003.01202) to arbitrary order. Our study is based on power counting and dimensional analysis of the higher order terms. We derive the latter, find characteristic strong coupling energy scales and obtain the conditions for the validity of the classical description. Curiously, we find that the strongest condition is the same as that obtained in already examined cubic case.

scholarly journals Quasistatic fluid-fluid displacement in porous media: Invasion-percolation through a wetting transition

2018 ◽  
Vol 3 (10) ◽  
Author(s):  
Bauyrzhan K. Primkulov ◽  
Stephen Talman ◽  
Keivan Khaleghi ◽  
Alireza Rangriz Shokri ◽  
Rick Chalaturnyk ◽  
...  
Keyword(s):  
Porous Media ◽  
Wetting Transition ◽  
Invasion Percolation ◽  
Fluid Displacement

scholarly journals Coherence Effects in Multiple Medium-Induced Radiation

Proceedings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 11
Author(s):  
Fabio Dominguez ◽  
Jose Guilherme Milhano ◽  
Carlos A. Salgado ◽  
Konrad Tywoniuk ◽  
Victor Vila
Keyword(s):  
Time Scales ◽  
Survival Probability ◽  
Jet Quenching ◽  
Close Correspondence ◽  
Gluon Emission ◽  
Classical Description ◽  
Theoretical Support ◽  
Coherence Effects ◽  
Hard Gluon

In the first part of this work we study the color coherence phenomenon by considering the well-known quark-antiquark antenna with an in-medium hard gluon emission and an extra very soft emission outside it—double antenna. By discussing the coherence effects in terms of the survival probability, we generalize previous studies of the antenna radiation to the case of more than two emitters. After providing support to the jet quenching picture with effective emitters in the QCD cascade, we present a novel setup of an antenna splitting inside the medium taking into account the finite formation time of the dipole, which turns out to be an important scale. We read into the role of coherence and the relevant time scales which control the scenario, while also providing theoretical support for vacuum-like emissions early in the medium. Finally, by mapping the spectrum of in-medium splittings through the corresponding kinematical Lund diagram, we appreciate regimes of a close correspondence to a semi-classical description.

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