Abstract Gravity driven film flows on vertical fibers are known to exhibit a variety of flow dynamics including the formation droplet trains induced by hydrodynamic (Kapitza) and Plateau–Rayleigh instability mechanisms. Through an experimental study, it is shown how inclination fiber from influences these dynamics. The waves, regime transitions dripping jetting, as well onset drop-off in form d...

The dripping faucet experiment seeks to provide a simple example of a system that exhibits predictable dynamics that transition to an unpredictable, chaotic behavior under certain conditions. The time between water drops falling from a nozzle, is measured with a straightforward experimental setup using a photodiode and a laser. The period, or time between falling drops, is dependent on the flow...

Monodispersed organic phase droplets with an average diameter from 20 to 200 µm were produced at the rate of up 20,000 per second in a glass microfluidic chip composed 7 parallel 3D flow focusing junctions 100 µm-deep channels. The continuous was 2 wt% polyvinyl alcohol solution, while dispersed dichloromethane, n-dodecane, and polydimethylsiloxane 10 cSt fluid corresponding dispersed-to-contin...

We give a hydrodynamical explanation for the chaotic behaviour of a dripping faucet using the results of the stability analysis of a static pendant drop and a proper orthogonal decomposition (POD) of the complete dynamics. We find that the only relevant modes are the two classical normal forms associated with a saddle– node–Andronov bifurcation and a Shilnikov homoclinic bifurcation. This allow...

In this study, gelatin microdroplets were generated using a PDMS square microchannel (100 ×100 µm). The flow regime map was experimentally determined, and the regimes in which is possible to obtain microdroplets, dripping jetting, studied detail. compared with maps published literature it found that depends significantly on viscosity ratio. For each regime, correlation calculate normalized size...

Background: The control and manipulation of the hydrodynamics droplets primarily relate to flow governing geometrical parameters. This study has explored influences capillary number (10−4≤Cac≤1) rate ratio (0.1≤Qr≤10) on droplet generation in two-phase through T-junction cross-flow microfluidic device. Methods: finite element method is used solve Eulerian framework a mathematical model based ma...

OBJECTIVES The low frequency of survival of stem cells implanted in the myocardium after acute myocardial infarction may be caused by inflammation and oxidative stress in the myocardial microenvironment. We evaluated the effects of a traditional Chinese medicine, Compound Danshen Dripping Pills, on the cardiac microenvironment and cardiac function when used alone or in combination with human um...

Abstract Further innovation in the field of selective laser sintering (SLS) is strongly connected to availability new materials since market dominated by polyamide 12 (>90%). The aim this publication develop a descriptive model for droplet formation process Filament Extension Atomizer predict applicability exploit further polymers SLS process. feasibility was tested, investigated and charact...