Flow in a ring-sheared drop: Drop deformation

2021 ◽  
Vol 33 (4) ◽  
pp. 042117
Author(s):  
F. P. Riley ◽  
P. M. McMackin ◽  
J. M. Lopez ◽  
A. H. Hirsa
Keyword(s):  
Drop Deformation

scholarly journals Comparison of Experimental and Numerical Transient Drop Deformation during Transition through Orifices in High-Pressure Homogenizers

2021 ◽  
Vol 5 (3) ◽  
pp. 32
Author(s):  
Benedikt Mutsch ◽  
Peter Walzel ◽  
Christian J. Kähler
Keyword(s):  
High Pressure ◽  
Visual Analysis ◽  
Imaging Technique ◽  
Extensional Flow ◽  
Droplet Breakup ◽  
Experimental Results ◽  
Drop Deformation ◽  
Droplet Deformation ◽  
Shadow Imaging ◽  
Good Agreement

The droplet deformation in dispersing units of high-pressure homogenizers (HPH) is examined experimentally and numerically. Due to the small size of common homogenizer nozzles, the visual analysis of the transient droplet generation is usually not possible. Therefore, a scaled setup was used. The droplet deformation was determined quantitatively by using a shadow imaging technique. It is shown that the influence of transient stresses on the droplets caused by laminar extensional flow upstream the orifice is highly relevant for the droplet breakup behind the nozzle. Classical approaches based on an equilibrium assumption on the other side are not adequate to explain the observed droplet distributions. Based on the experimental results, a relationship from the literature with numerical simulations adopting different models are used to determine the transient droplet deformation during transition through orifices. It is shown that numerical and experimental results are in fairly good agreement at limited settings. It can be concluded that a scaled apparatus is well suited to estimate the transient droplet formation up to the outlet of the orifice.

scholarly journals Drop deformation under surfactants adsorption

PAMM ◽  
2007 ◽  
Vol 7 (1) ◽  
pp. 4100041-4100042
Author(s):  
Ioan-Raducan Stan ◽  
Maria Tomoaia-Cotisel ◽  
Aurelia Stan
Keyword(s):  
Drop Deformation

Effect of overall drop deformation on flow-induced coalescence at low capillary numbers

2006 ◽  
Vol 18 (1) ◽  
pp. 013602 ◽  
Author(s):  
Fabio Baldessari ◽  
L. Gary Leal
Keyword(s):  
Drop Deformation

Drop impact and capture on a thin flexible fiber

Soft Matter ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 149-156 ◽  
Author(s):  
Jean Comtet ◽  
Bavand Keshavarz ◽  
John W. M. Bush
Keyword(s):  
Drop Impact ◽  
Capture Efficiency ◽  
Drop Deformation ◽  
Flexible Fiber ◽  
Complex Dependence ◽  
Fiber Flexibility

The interaction between fiber oscillations and drop deformation leads to a complex dependence of drop capture efficiency on fiber flexibility.

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.

Role of viscoelastic interfaces in emulsion rheology and drop deformation

2007 ◽  
Vol 14 (S1) ◽  
pp. 246-249 ◽  
Author(s):  
Philipp Erni ◽  
Peter Fischer ◽  
Erich J. Windhab
Keyword(s):  
Drop Deformation ◽  
Emulsion Rheology

THREE-DIMENSIONAL SIMULATIONS OF DROP DEFORMATION AND BREAKUP IN AIR FLOW AND COMPARISONS WITH EXPERIMENTAL OBSERVATIONS

2018 ◽  
Vol 28 (7) ◽  
pp. 621-641 ◽  
Author(s):  
Chao Liang ◽  
Kathleen A. Feigl ◽  
Franz X. Tanner ◽  
William R. Case ◽  
Erich J. Windhab
Keyword(s):  
Air Flow ◽  
Three Dimensional ◽  
Drop Deformation ◽  
Three Dimensional Simulations

Drop deformation estimate with multi-polarization radar

2020 ◽  
Vol 12 (9) ◽  
pp. 870-877
Author(s):  
Yuliya Averyanova ◽  
Anna Rudiakova ◽  
Felix Yanovsky
Keyword(s):  
Drop Size ◽  
Mathematical Expression ◽  
Microwave Remote Sensing ◽  
Radar Signal ◽  
Drop Deformation ◽  
Size Distributions ◽  
Polarimetric Radar ◽  
Energy Redistribution ◽  
Drop Size Distributions ◽  
Radar Antenna

AbstractThis paper considers the ability of polarization measurements for microwave remote sensing of clouds and precipitation. The simulation of reflections from liquid hydrometeors with a multi-polarization radar system is presented. The mathematical expression of energy received by a radar antenna with arbitrary polarization is obtained. The simulation of the energy redistribution of the signal reflected from liquid hydrometeors assembled over the antennas of multi-polarimetric radar for different wind conditions and different drop-size distributions is obtained and analyzed. The simulation results demonstrate the possibility to register wind and wind-related phenomena by polarimetric radar. The results of the paper can also be used to exclude an impact of drop vibration or oscillation into the radar signal to eliminate errors and underestimation during parameter measurements. The approach to segregate the reflected signal magnitude variations due to the wind-related phenomena from other factors is discussed.

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