In this study, droplet-particle collisions in mid-air are numerically investigated for a wide range of collision parameters: Weber number, contact angle and droplet/particle diameter ratio (4 ≤ We 150, 20° θeqi 160°, Ω = 1/2 1). To perform these simulations an efficient manner, simple dual grid based adaptive mesh refinement (SDG AMR) strategy is proposed implemented our existing multiphase flo...

Although many analytical, experimental and numerical studies have focused on droplet motion, the mechanics of the droplet while still in its static state, and just before motion starts, are not well understood. A study of static droplets would shed light on the threshold voltage (or critical inclination) for initiating electrically (or gravitationally) induced droplet motion. Before the droplet...

Suitability of the Sauter mean diameter and the surface-area mean diameter for representing the ignition and combustor behavior of polydisperse sprays is examined. Initial size distributions considered are the Nukiyama-Tanasawa distribution and a bidisperse spray. Two physical situations are analyzed. In the first, the ignition characteristics of a polydisperse spray in the viscinity of a hot w...

Droplet impact on a spinning surface has been observed in different industries and plays an important role the performance of industrial systems. In current study, dynamics water droplet hydrophilic disk is investigated. An experimental setup designed way that diameter, velocity, rotational speed, location are precisely controlled. While diameter fixed present other mentioned parameters changed...

Given the problem that droplets cannot stay on surfaces of leaves and wet them effectively, resulting in high levels pesticide input environmental pollution, this work studied dynamic behaviors with different diameters (400–550 um) falling wheat from heights (2–16 cm) using contact angle-measuring instruments a high-speed camera. The VOF method Fluent software was used to establish numerical mo...

We investigate the assembly of a binary mixture patchy colloids and droplets into crystal structures by use space-filling principle Metropolis Monte Carlo simulations. Here, with six patches in an octahedral symmetry attract droplets, whereas colloid-colloid droplet-droplet pairwise interactions are purely hard-core repulsions. Within parameter space regions that allow for stable crystals, we f...

In this work we present the effect of Reynolds and Lewis numbers on fuel droplet vaporization n-heptane. This study allows us to fully understand phenomenon fine droplets (spray) in energy systems order improve combustion efficiency, reduce formation pollutants unburnt materials such as carbon monoxide Nox. The is based an analytical solution governing equations process by calculating diameter ...

The spray characteristics of an air-assisted electrostatic atomiser are experimentally investigated using a shadowgraphy particle/droplet image analysis (PDIA) technique. Tests conducted for varied rates liquid- and airflow, with without voltage applied to the nozzle electrode. found droplet sizes neatly match Rosin–Rammler distribution, expression mean diameter as function flow is given. Notab...