The combustion of a freely falling dodecane droplet has been studied experimentally in droptower-like facility under ambient conditions. A unique ignition mechanism is used by igniting the pendant mode and releasing it to fall freely. This unveils different type wake flame behavior which explored this study. Initially, transitions from fully enveloped configuration due forward extinction. simil...

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...

Cryogen spray cooling (CSC) is an auxiliary procedure to dermatologic laser surgery which consists of pre-cooling the superficial skin layer (epidermis) during laser irradiation of subsurface targets to avoid non-specific epidermal thermal damage. While previous studies have investigated the interaction of cryogen sprays with microscopically smooth human skin models, it is important to recogniz...

A coupled map model for cloud dynamics is proposed, which consists of the successive operations of the physical processes; buoyancy, diusion, viscosity, adi-abatic expansion, fall of a droplet by gravity, descent ow dragged by the falling droplet, and advection. Through extensive simulations, the phases corresponding to stratus, cumulus, stratocumulus and cumulonimbus are found, with the change...

Passive dripping, the slow dripping of blood under gravity, is responsible for some bloodstains found at crime scenes, particularly drip trails left by a person moving through the scene. Previous work by other authors has established relationships, under ideal conditions, between the size of the stain, the number of spines and satellite stains, the roughness of the surface, the size of the bloo...

The increasing demand for high energy density fuels and the concern for their safety have propelled research in the field of gelled propellants, where understanding the combustion of single gelled fuel droplets is the first stage to predict the spray combustion characteristics. The experiments utilized single-isolated freely falling gelled unsymmetrical dimethylhydrazine (UDMH) droplets instead...

There is a growing interest in numerically handling of the interface dynamics in multiphase flows with large density and viscosity ratio in several scientific and engineering applications. We present a parallel space-time implementation of a least-squares spectral element method for the incompressible Cahn-Hilliard and Navier-Stokes equations for different densities and viscosities between phas...