scholarly journals Mimicking Geologic Depositional Fabrics for Multiphase Flow Experiments

2019 ◽  
Vol 55 (11) ◽  
pp. 9623-9638 ◽  
Author(s):  
Prasanna G. Krishnamurthy ◽  
Tip A. Meckel ◽  
David DiCarlo
Keyword(s):  
Multiphase Flow ◽  
Flow Experiments

Determining fluid saturations during multiphase flow experiments by NMR imaging techniques

AIChE Journal ◽  
1994 ◽  
Vol 40 (7) ◽  
pp. 1238-1245 ◽  
Author(s):  
Songhua Chen ◽  
Fangfang Qin ◽  
A. Ted Watson
Keyword(s):  
Multiphase Flow ◽  
Imaging Techniques ◽  
Nmr Imaging ◽  
Flow Experiments

Pore-scale multiphase flow experiments in bead packs of variable wettability

Geofluids ◽  
2013 ◽  
Vol 14 (1) ◽  
pp. 95-105 ◽  
Author(s):  
J. G. Celauro ◽  
V. A. Torrealba ◽  
Z. T. Karpyn ◽  
K. A. Klise ◽  
S. A. McKenna
Keyword(s):  
Multiphase Flow ◽  
Pore Scale ◽  
Flow Experiments

Uncertainty analysis for multiphase flow: A case study for horizontal air-water flow experiments

2021 ◽  
pp. 101972
Author(s):  
Felipe Jaloretto da Silva ◽  
Guilherme Gonçalves da Silva ◽  
Jorge Luiz Biazussi ◽  
Marcelo Souza de Castro
Keyword(s):  
Multiphase Flow ◽  
Uncertainty Analysis ◽  
Water Flow ◽  
Flow Experiments

Modeling and Implementation of a Database for Multiphase Flow Experiments

1996 ◽  
Author(s):  
Gunnar Borthne ◽  
Oddmund Johannessen ◽  
Paal Hedne
Keyword(s):  
Multiphase Flow ◽  
Flow Experiments

Modeling variability in porescale multiphase flow experiments

2017 ◽  
Vol 105 ◽  
pp. 29-38 ◽  
Author(s):  
Bowen Ling ◽  
Jie Bao ◽  
Mart Oostrom ◽  
Ilenia Battiato ◽  
Alexandre M. Tartakovsky
Keyword(s):  
Multiphase Flow ◽  
Flow Experiments

scholarly journals The Origin of Non-thermal Fluctuations in Multiphase Flow in Porous Media

2021 ◽  
Vol 3 ◽  
Author(s):  
Maja Rücker ◽  
Apostolos Georgiadis ◽  
Ryan T. Armstrong ◽  
Holger Ott ◽  
Niels Brussee ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Pressure Fluctuations ◽  
Flow Theory ◽  
Flow Regimes ◽  
Energy Scale ◽  
Dynamic Imaging ◽  
Pore Scale ◽  
Fractional Flow ◽  
Flow Experiments ◽  
Fractional Flow Theory

Core flooding experiments to determine multiphase flow in properties of rock such as relative permeability can show significant fluctuations in terms of pressure, saturation, and electrical conductivity. That is typically not considered in the Darcy scale interpretation but treated as noise. However, in recent years, flow regimes that exhibit spatio-temporal variations in pore scale occupancy related to fluid phase pressure changes have been identified. They are associated with topological changes in the fluid configurations caused by pore-scale instabilities such as snap-off. The common understanding of Darcy-scale flow regimes is that pore-scale phenomena and their signature should have averaged out at the scale of representative elementary volumes (REV) and above. In this work, it is demonstrated that pressure fluctuations observed in centimeter-scale experiments commonly considered Darcy-scale at fractional flow conditions, where wetting and non-wetting phases are co-injected into porous rock at small (<10−6) capillary numbers are ultimately caused by pore-scale processes, but there is also a Darcy-scale fractional flow theory aspect. We compare fluctuations in fractional flow experiments conducted on samples of few centimeters size with respective experiments and in-situ micro-CT imaging at pore-scale resolution using synchrotron-based X-ray computed micro-tomography. On that basis we can establish a systematic causality from pore to Darcy scale. At the pore scale, dynamic imaging allows to directly observe the associated breakup and coalescence processes of non-wetting phase clusters, which follow “trajectories” in a “phase diagram” defined by fractional flow and capillary number and can be used to categorize flow regimes. Connected pathway flow would be represented by a fixed point, whereas processes such as ganglion dynamics follow trajectories but are still overall capillary-dominated. That suggests that the origin of the pressure fluctuations observed in centimeter-sized fractional flow experiments are capillary effects. The energy scale of the pressure fluctuations corresponds to 105-106 times the thermal energy scale. This means the fluctuations are non-thermal. At the centimeter scale, there are non-monotonic and even oscillatory solutions permissible by the fractional flow theory, which allow the fluctuations to be visible and—depending on exact conditions—significant at centimeter scale, within the viscous limit of classical (Darcy scale) fractional flow theory. That also means that the phenomenon involves both capillary aspects from the pore or cluster scale and viscous aspects of fractional flow and occurs right at the transition, where the physical description concept changes from pore to Darcy scale.

Investigation on the control of multiphase flow behavior in a continuous casting tundish during ladle change

2020 ◽  
Vol 117 (6) ◽  
pp. 619
Author(s):  
Rui Xu ◽  
Haitao Ling ◽  
Haijun Wang ◽  
Lizhong Chang ◽  
Shengtao Qiu
Keyword(s):  
Multiphase Flow ◽  
Flow Behavior ◽  
Rolled Strip ◽  
Impact Zone ◽  
Steel Cleanliness ◽  
Carry Over ◽  
Slag Carry Over ◽  
Hot Rolled ◽  
Turbulence Inhibitor ◽  
The Impact

The transient multiphase flow behavior in a single-strand tundish during ladle change was studied using physical modeling. The water and silicon oil were employed to simulate the liquid steel and slag. The effect of the turbulence inhibitor on the slag entrainment and the steel exposure during ladle change were evaluated and discussed. The effect of the slag carry-over on the water-oil-air flow was also analyzed. For the original tundish, the top oil phase in the impact zone was continuously dragged into the tundish bath and opened during ladle change, forming an emulsification phenomenon. By decreasing the liquid velocities in the upper part of the impact zone, the turbulence inhibitor decreased considerably the amount of entrained slag and the steel exposure during ladle change, thereby eliminating the emulsification phenomenon. Furthermore, the use of the TI-2 effectively lowered the effect of the slag carry-over on the steel cleanliness by controlling the movement of slag droplets. The results from industrial trials indicated that the application of the TI-2 reduced considerably the number of linear inclusions caused by ladle change in hot-rolled strip coils.

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