scholarly journals Novel fluid–fluid interface domains in geologic media

2019 ◽  
Vol 21 (1) ◽  
pp. 145-154 ◽  
Author(s):  
Juliana B. Araújo ◽  
Mark L. Brusseau
Keyword(s):  
Porous Media ◽  
High Resolution ◽  
Fluid Interfaces ◽  
Fluid Interface ◽  
Geologic Media

High-resolution microtomographic imaging revealed the presence of fluid–fluid interfaces associated with physical heterogeneities such as pits and crevices present on the surfaces of natural porous media.

scholarly journals In situ assessment of the contact angles of nanoparticles adsorbed at fluid interfaces by multiple angle of incidence ellipsometry

Soft Matter ◽  
2014 ◽  
Vol 10 (36) ◽  
pp. 6999-7007 ◽  
Author(s):  
Antonio Stocco ◽  
Ge Su ◽  
Maurizio Nobili ◽  
Martin In ◽  
Dayang Wang
Keyword(s):  
Surface Coverage ◽  
Contact Angles ◽  
Fluid Interfaces ◽  
Angle Of Incidence ◽  
Fluid Interface ◽  
Colloidal Interactions ◽  
In Situ Assessment

Contact angles and surface coverage of nanoparticles adsorbing at the fluid interface are assessed by ellipsometry. Results reveal the competition between wetting and colloidal interactions.

Continuum and Molecular Dynamics Studies of the Hydrodynamics of Colloids Straddling a Fluid Interface

2021 ◽  
Vol 54 (1) ◽  
Author(s):  
Charles Maldarelli ◽  
Nicole T. Donovan ◽  
Subramaniam Chembai Ganesh ◽  
Subhabrata Das ◽  
Joel Koplik
Keyword(s):  
Molecular Dynamics ◽  
Characteristic Size ◽  
Two Dimensions ◽  
Annual Review ◽  
Publication Date ◽  
Fluid Interfaces ◽  
Particle Interactions ◽  
Fluid Interface ◽  
Interfacial Energies ◽  
Multiple Particle

Colloid-sized particles (10 nm–10 μm in characteristic size) adsorb onto fluid interfaces, where they minimize their interfacial energy by straddling the surface, immersing themselves partly in each phase bounding the interface. The energy minimum achieved by relocation to the surface can be orders of magnitude greater than the thermal energy, effectively trapping the particles into monolayers, allowing them freedom only to translate and rotate along the surface. Particles adsorbed at interfaces are models for the understanding of the dynamics and assembly of particles in two dimensions and have broad technological applications, importantly in foam and emulsion science and in the bottom-up fabrication of new materials based on their monolayer assemblies. In this review, the hydrodynamics of the colloid motion along the surface is examined from both continuum and molecular dynamics frameworks. The interfacial energies of adsorbed particles is discussed first, followed by the hydrodynamics, starting with isolated particles followed by pairwise and multiple particle interactions. The effect of particle shape is emphasized, and the role played by the immersion depth and the surface rheology is discussed; experiments illustrating the applicability of the hydrodynamic studies are also examined. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 54 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Imaging of Single Phase Flow in Porous Media by High Resolution MRI

2010 ◽  
Vol 113-116 ◽  
pp. 126-131 ◽  
Author(s):  
Lan Lan Jiang ◽  
Yong Chen Song ◽  
Yu Liu ◽  
Yue Chao Zhao ◽  
Ning Jun Zhu ◽  
...  
Keyword(s):  
Porous Media ◽  
High Resolution ◽  
Velocity Distribution ◽  
Flow Direction ◽  
Spin Echo ◽  
Flow Distribution ◽  
Flow In Porous Media ◽  
Mean Velocity ◽  
High Resolution Mri ◽  
Spin Echo Sequence

This paper presents the single flow in porous media to investigate CO2 flow velocity in porous media.We used high resolution MRI to visualize the fluid flow distribution and measure axial mean velocity in porous media.In the experiment, the porous media sample was packed with glass beads, with a porosity of around 0.4. Based the traditional spin echo sequence, we modified the sequence with flow encoding gradients in the flow direction .The sample was saturated. The water flow rates were 1ml/min、2ml/min、3ml/min and 5ml/min,respectively. First, the sequence was calibrated by pipe flow without porous media. As expected, the experimental images show parabolic velocity distribution. The velocity in the centre is high. Then the sample was measured with the same sequence. The images show that the velocity distribution is homogeneous in the porous media. In the boundary of the sample, the velocities are low because of wall-effect. Moreover, the mean velocities calculated from MRI images agree with the real velocities.These errors between calculated velocities and real velocities are small. It may be reduced by changing the experiment conditions.MRI is a useful technology for measuring flow in porous media.

scholarly journals Interface deformations affect the orientation transition of magnetic ellipsoidal particles adsorbed at fluid–fluid interfaces

Soft Matter ◽  
2014 ◽  
Vol 10 (35) ◽  
pp. 6742-6748 ◽  
Author(s):  
Gary B. Davies ◽  
Timm Krüger ◽  
Peter V. Coveney ◽  
Jens Harting ◽  
Fernando Bresme
Keyword(s):  
Magnetic Field ◽  
Fluid Interfaces ◽  
Fluid Interface ◽  
Ellipsoidal Particles ◽  
Particle Monolayer

Magnetic ellipsoidal particles adsorbed at a fluid–fluid interface create dipolar interface deformations in response to a magnetic field, which affects their orientation and may lead to novel particle monolayer structures.

scholarly journals Large scale flow visualization and anemometry applied to lab-on-a-chip models of porous media

Lab on a Chip ◽  
2016 ◽  
Vol 16 (15) ◽  
pp. 2851-2859 ◽  
Author(s):  
Johan Paiola ◽  
Harold Auradou ◽  
Hugues Bodiguel
Keyword(s):  
Porous Media ◽  
High Resolution ◽  
Velocity Field ◽  
Flow Visualization ◽  
Experimental Technique ◽  
Large Scale ◽  
Lab On A Chip ◽  
Large Scale Flow ◽  
Very High

The following is a report on an experimental technique that allows one to quantify and map the velocity field with very high resolution and simple equipment in large 2D devices.

Sign in / Sign up

Export Citation Format

Share Document