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...

The extent to which the continuum treatment holds in binary droplet collisions is examined in the present work by using a continuum-based implicit surface capturing strategy (Volume-of-Fluid coupled to Navier-Stokes) and a molecular dynamics methodology. The droplet pairs are arranged in a head-on-collision configuration with an initial separation distance of 5.3 nm and a velocity of 3 ms. The ...

In this thesis capillary dominated two–phase flow is studied by means of numerical simulations and experiments. The theoretical basis for the simulations consists of a phase field model, which is derived from the system’s thermodynamics, and coupled with the Navier Stokes equations. Two types of interfacial flow are investigated, droplet dynamics in a bifurcating channel and spontaneous capilla...

INTRODUCTION: Droplet microfluidics is a fast growing research area that deals with the formation and break-up of micro-droplets using two immiscible fluids. This field is already revolutionizing the chemical and biological labs due to the enhanced characteristics offered by assays with greater surface area to volume ratio as compared to conventional methods [1-3] A set of microfluidic channels...

We studied the behavior of a nonspherical Pickering droplet subjected to an electric stress. explained effect geometry, particle size, and field strength, on deformation collapsing particle-covered droplets.

the objective of this research is to develop an accurate numerical method to be used in showing the deformation of a liquid fuel droplet in a convective field. to simultaneously solve the internal liquid droplet flow field as well as the external gas phase flow field, a nonstaggered rectangular grid system without any coordinate transformation is used. transition from the gas field to the liqui...

The potential for nanofuels as one of the clean sources of energy on account of its enhanced combustion performance coupled with low emissions has been established. Considering the importance of the fuel evaporation phase in the entire combustion process, this work presents an attempt at applying the steady state analysis equations to nanofuel experimental data obtained from the li...

Droplet collisions on superhydrophobic cylindrical surfaces are widely seen in industrial applications. To investigate their dynamic behavior, numerical simulations of droplets impacting eccentrically the surface a small cylinder performed this work. The eccentricity e ranges from 0 to 1.2 mm, and impact velocity 0.5 2 m/s. effects studied detail. results show that increasing reduces maximum sp...

While quantum fluctuations in binary mixtures of bosonic atoms with short-range interactions can lead to the formation a self-bound droplet, for equal intracomponent but an unequal number two components, there is excess part that cannot bind droplet. Imposing confinement, as here through periodic boundary conditions one-dimensional setting, droplet becomes amalgamated residual condensate. The r...