Foam-Film-Stabilized Liquid Bridge Networks in Evaporative Lithography and Wet Granular Matter

Langmuir ◽  
2013 ◽  
Vol 29 (16) ◽  
pp. 4966-4973 ◽  
Author(s):  
Ivan U. Vakarelski ◽  
Jeremy O. Marston ◽  
Sigurdur T. Thoroddsen
Langmuir ◽  
2009 ◽  
Vol 25 (23) ◽  
pp. 13311-13314 ◽  
Author(s):  
Ivan U. Vakarelski ◽  
Jin W. Kwek ◽  
Xiaosong Tang ◽  
Sean J. O’Shea ◽  
Derek Y. C. Chan

Soft Matter ◽  
2014 ◽  
Vol 10 (42) ◽  
pp. 8489-8499 ◽  
Author(s):  
Michael J. Neeson ◽  
Raymond R. Dagastine ◽  
Derek Y. C. Chan ◽  
Rico F. Tabor

The liquid bridge that forms between a particle and a flat surface, and the dynamics of its evaporation are pertinent to a range of physical processes including paint and ink deposition, spray drying, evaporative lithography and the flow and processing of powders.


2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Mohsen Torabi ◽  
Ahmed A. Hemeda ◽  
James W. Palko ◽  
Yu Feng ◽  
Yong Cao ◽  
...  
Keyword(s):  

2019 ◽  
Vol 122 (21) ◽  
Author(s):  
S. Lherminier ◽  
R. Planet ◽  
V. Levy dit Vehel ◽  
G. Simon ◽  
L. Vanel ◽  
...  
Keyword(s):  

Author(s):  
Xiangqi Li ◽  
Dengfei Wang ◽  
Fenglei Huang ◽  
Ziqi Cai ◽  
Zhengming Gao

2021 ◽  
Vol 23 (4) ◽  
Author(s):  
Stefan Luding ◽  
Yimin Jiang ◽  
Mario Liu

Abstract Jamming/un-jamming, the transition between solid- and fluid-like behavior in granular matter, is an ubiquitous phenomenon in need of a sound understanding. As argued here, in addition to the usual un-jamming by vanishing pressure due to a decrease of density, there is also yield (plastic rearrangements and un-jamming that occur) if, e.g., for given pressure, the shear stress becomes too large. Similar to the van der Waals transition between vapor and water, or the critical current in superconductors, we believe that one mechanism causing yield is by the loss of the energy’s convexity (causing irreversible re-arrangements of the micro-structure, either locally or globally). We focus on this mechanism in the context of granular solid hydrodynamics (GSH), generalized for very soft materials, i.e., large elastic deformations, employing it in an over-simplified (bottom-up) fashion by setting as many parameters as possible to constant. Also, we complemented/completed GSH by using various insights/observations from particle simulations and calibrating some of the theoretical parameters—both continuum and particle points of view are reviewed in the context of the research developments during the last few years. Any other energy-based elastic-plastic theory that is properly calibrated (top-down), by experimental or numerical data, would describe granular solids. But only if it would cover granular gas, fluid, and solid states simultaneously (as GSH does) could it follow the system transitions and evolution through all states into un-jammed, possibly dynamic/collisional states—and back to elastically stable ones. We show how the un-jamming dynamics starts off, unfolds, develops, and ends. We follow the system through various deformation modes: transitions, yielding, un-jamming and jamming, both analytically and numerically and bring together the material point continuum model with particle simulations, quantitatively. Graphic abstract


2021 ◽  
Vol 33 (2) ◽  
Author(s):  
Paolo Capobianchi ◽  
Marcello Lappa

AbstractSystems of solid particles in suspension driven by a time-periodic flow tend to create structures in the carrier fluid that are reminiscent of highly regular geometrical items. Within such a line of inquiry, the present study provides numerical results in support of the space experiments JEREMI (Japanese and European Research Experiment on Marangoni flow Instabilities) planned for execution onboard the International Space Station. The problem is tackled by solving the unsteady non-linear governing equations for the same conditions that will be established in space (microgravity, 5 cSt silicone oil and different aspect ratios of the liquid bridge). The results reveal that for a fixed supporting disk radius, the dynamics are deeply influenced by the height of the liquid column. In addition to its expected link with the critical threshold for the onset of instability (which makes Marangoni flow time-periodic), this geometrical parameter can have a significant impact on the emerging waveform and therefore the topology of particle structures. While for shallow liquid bridges, pulsating flows are the preferred mode of convection, for tall floating columns the dominant outcome is represented by rotating fluid-dynamic disturbance. In the former situation, particles self-organize in circular sectors bounded internally by regions of particle depletion, whereas in the latter case, particles are forced to accumulate in a spiral-like structure. The properties of some of these particle attractors have rarely been observed in earlier studies concerned with fluids characterized by smaller values of the Prandtl number.


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