scholarly journals Steiner triangular drop dynamics

2020 ◽  
Vol 30 (2) ◽  
pp. 023118
Author(s):  
Elizabeth Wesson ◽  
Paul Steen
Keyword(s):  
Drop Dynamics

Rheological Aspects of Drops Deforming in Finite Reynolds Number Oscillatory Extensional Flows

2004 ◽  
Author(s):  
Xiaoyi Li ◽  
Kausik Sarkar
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Extensional Flow ◽  
Three Dimensional ◽  
Industrial Applications ◽  
Drop Deformation ◽  
Interface Morphology ◽  
Drop Dynamics ◽  
Variation Of Parameters ◽  
Broad Implication

The evolving morphology of droplets in a flowing emulsion determines its rheological properties. A two-way interaction between drops and the flow governs the rheological stresses arising from drop deformation. In this paper, the rheology of droplet emulsions under oscillatory extensional flow is investigated using direct numerical simulation (DNS). The deformation of a three dimensional drop is simulated. The rheological responses are related with the interface morphology using Bachelor’s stress formulation [6]. Detailed investigation of the variation of parameters such as interfacial tension, flow frequency and inertia displayed complex non-Newtonian response of the emulsion that will have broad implication in industrial applications. The results are explained and discussed with a simple model for the drop dynamics.

scholarly journals Desiccating colloidal sessile drop: dynamics of shape and concentration

2011 ◽  
Vol 289 (9) ◽  
pp. 1015-1023 ◽  
Author(s):  
Yuri Yu. Tarasevich ◽  
Irina V. Vodolazskaya ◽  
Olga P. Isakova
Keyword(s):  
Sessile Drop ◽  
Drop Dynamics

scholarly journals Radar Detection of Individual Raindrops

2019 ◽  
Vol 100 (12) ◽  
pp. 2433-2450 ◽  
Author(s):  
Jerome M. Schmidt ◽  
Piotr J. Flatau ◽  
Paul R. Harasti ◽  
Robert. D. Yates ◽  
David J. Delene ◽  
...  
Keyword(s):  
Doppler Radar ◽  
Near Field ◽  
High Sensitivity ◽  
Radar Reflectivity ◽  
Range Resolution ◽  
Particle Properties ◽  
Drop Dynamics ◽  
Cloud Radar ◽  
Aircraft Tracking ◽  
Oscillation Characteristics

Abstract Descriptions of the experimental design and research highlights obtained from a series of four multiagency field projects held near Cape Canaveral, Florida, are presented. The experiments featured a 3 MW, dual-polarization, C-band Doppler radar that serves in a dual capacity as both a precipitation and cloud radar. This duality stems from a combination of the radar’s high sensitivity and extremely small-resolution volumes produced by the narrow 0.22° beamwidth and the 0.543 m along-range resolution. Experimental highlights focus on the radar’s real-time aircraft tracking capability as well as the finescale reflectivity and eddy structure of a thin nonprecipitating stratus layer. Examples of precipitating storm systems focus on the analysis of the distinctive and nearly linear radar reflectivity signatures (referred to as “streaks”) that are caused as individual hydrometeors traverse the narrow radar beam. Each streak leaves a unique radar reflectivity signature that is analyzed with regard to estimating the underlying particle properties such as size, fall speed, and oscillation characteristics. The observed along-streak reflectivity oscillations are complex and discussed in terms of diameter-dependent drop dynamics (oscillation frequency and viscous damping time scales) as well as radar-dependent factors governing the near-field Fresnel radiation pattern and inferred drop–drop interference.

Drop Dynamics in Complex Fluids

2010 ◽  
pp. 339-363 ◽  
Author(s):  
James J. Feng ◽  
Xiaopeng Chen ◽  
Pengtao Yue ◽  
Chunfeng Zhou
Keyword(s):  
Complex Fluids ◽  
Drop Dynamics

Optimization of fluid characteristics of 2D materials for inkjet printing

MRS Advances ◽  
2016 ◽  
Vol 1 (30) ◽  
pp. 2199-2206 ◽  
Author(s):  
Monica Michel ◽  
Jay A. Desai ◽  
Alberto Delgado ◽  
Chandan Biswas ◽  
Anupama B. Kaul
Keyword(s):  
Surface Energy ◽  
Inkjet Printing ◽  
Ethyl Cellulose ◽  
2D Materials ◽  
The Novel ◽  
Liquid Exfoliation ◽  
Drop Dynamics ◽  
Surface Energies ◽  
Fluid Characteristics

ABSTRACT2D materials have shown to be the next step in semiconductor use and device manufacturing that can allow us to reduce the size of most electronics. One of the novel ways to obtain 2D materials is through liquid exfoliation, in which these materials can be obtained by dispersing the smallest possible particles in different solvents. Once obtained, the solutions can be used to manufacture devices via different processes, one of which is inkjet printing. This process relies in selecting “jettable” fluids, which need to have the necessary combination of viscosity and surface energy or “wettability”. In this work we have modified the viscosities and surface energies of five solvents: IPA (Isopropanol), NMP (N-methyl – 2 pyrrolidone), DMA (Dimethylacetamide), DMF (Dimethylformamide) and a mixture of Cyclohexanone / Terpineol 7:3. We have found an avenue to tailor the viscosity of these solvents though the addition of Ethyl Cellulose (EC), where the viscosity has been increased by up to 15 times at an EC concentration of 6%. For inkjet printing, ideally a viscosity of 4 – 10 cP is recommended, which we have been able to achieve with all of the solvents studied. It has been found that the different solvents present different susceptibilities to the EC addition, with DMA and DMF being the least sensitive to the EC addition. We have also studied the change in the drop dynamics and interactions of the 2D solutions with the substrate. Through this analysis we have found solvents that appear to be attractive for inkjet printing of MoS2 and graphite.

Control of jet drop dynamics by organic material in seawater

1978 ◽  
Vol 83 (C12) ◽  
pp. 6187 ◽  
Author(s):  
Duncan C. Blanchard ◽  
Eva J. Hoffman
Keyword(s):  
Organic Material ◽  
Drop Dynamics

Drop dynamics after impact on a solid wall: Theory and simulations

2010 ◽  
Vol 22 (6) ◽  
pp. 062101 ◽  
Author(s):  
Jens Eggers ◽  
Marco A. Fontelos ◽  
Christophe Josserand ◽  
Stéphane Zaleski
Keyword(s):  
Solid Wall ◽  
Drop Dynamics
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