We investigate here how the surrounding gas influence the dynamics of drop impacts on a thin liquid film. We describe in details the entrapment of the gas bubble using numerical simulations with high enough mesh resolution. The bubble entrapment comes from viscous effect in the thin gas layer that need to be evacuated down the drop, creating a high pressure field that deforms the drop interface...

Ice accretion on aircraft wings due to Supercooled Large Droplet (SLD) has a significant impact flight safety. The dynamic behaviours of large droplet, such as deformation, breakup and splashing, have effects icing accretion. corresponding studies been carried out experimentally numerically, empirical models predict the droplets proposed. However, few involve surface roughness effects, especial...

In this work the isothermal transition from bubbling to jetting regime in a bottom blown Peirce-Smith copper converter is numerically studied, varying the air jet injection velocity from 5 to 100 m s -1 . Large Eddy Simulation turbulence model is employed in the computer simulations to obtain transient, rather than averaged, phase distributions. For low injection velocities the bubbling regime ...

Waves on the ocean are generated well away from any shoreline and travel under a prevailing wind towards a distant shore. These deep-water waves eventually become shallow-water waves and break near the shore creating a turbulent surf front of bubbles, foam and spray, encompassing secondary breaking and smaller splashing waves. Human surfers can propel themselves shorewards on these breakers or ...

Jet-wiping is a hydrodynamic method for controlling the liquid film thickness in a coating process. In industrial conditions, the jet is generally turbulent. When the jet wipes a liquid film, it usually induces violent film instability called splashing. The instability is characterized by the ejection of droplets from the runback flow. Consequently, it can degrade the final coating quality sinc...

The stepped channel design have been used since more than 3,000 years. It is understood that low flows behave as successions of free-jets (i.e. nappe flow) while large discharges skim over the pseudo-bottom formed by the step edges. For a range of intermediate flow rates, a transition flow regime takes place. The dominant feature is stagnation on the horizontal step face associated with signifi...

Humans have the remarkable ability to infer many different physical properties of objects from observing dynamic scenes. Here, we propose a generative model for inferring physical object properties from real world videos of objects splashing in the water. At the core of our generative model is a 3D physics engine which models the object’s interactions with the environment based on parameters su...

Among the Hausa-Fulani women of Zaria, Nigeria, "cold" or "sanyi" is thought to be a common cause of illnesses, and especially edema (swelling) during pregnancy. The traditional treatment for these illnesses is a hot bath. The new mother or mother-to-be sleeps in an overheated room and must take baths in very hot water, called "wankan- jego," to keep out the cold. The birth attendant uses a ...