Numerical simulation of high inertial liquid-in-gas droplet in a T-junction microchannel

Abstract

Two new flow regimes named unstable dripping and unstable jetting are identified in aqueous droplet generation within high inertial air flow inside a T-Junction microchannel.

Catalytic activity of nickel nanoparticles stabilized by adsorbing polymers for enhanced carbon sequestration

“…CO 2 dissolution into an aqueous phase occurring at the interface has been quantified successfully by observing bubble size and morphology 43 – 48 . Owing to the high surface area to volume ratio of microbubble, the mass transfer rate is considerably enhanced over very short time scales, resulting in fast changes in bubble size 48 – 54 . The rapid change in CO 2 microbubbles facilitates accurate quantification of the CO 2 dissolution rate.…”

Droplet digital PCR of viral ‎DNA/RNA, current progress, challenges, and future perspectives

“…Busby et al 22 proved that on average ddPCR values were 60% of qPCR values of the 8E5 calibration standard due to the loss of human immunodeficiency virus (HIV) DNA from the 8E5 cell calibrant. 24 Here, we review recent advances in ddPCR and how these micro-reactor droplets are built to accelerate the development of viral detection methods. This review paper addresses recent advances, ranging from microfluidics to detecting viruses by ddPCR techniques, including the review of microfluidics devices, droplet generation, and various aspects of droplet formation and geometry.…”

Effects of wall velocity slip on droplet generation in microfluidic T-junctions

“…As a widely used simulation method, 20,24,25 the volume of uid (VOF) is employed in our simulations to track the interface between phases based on the volume fraction a within individual grid cells. The continuity equation and Navier-Stokes equation are used to solve the transport equation to dene the ow eld.…”

“…18,19 It is also found that the high inertial ow can bring some differences in droplet generation, for the case of water-in-air systems. 20 An enormous amount of research reveals that the viscosity ratio l and ow rate ratio Q of the dispersed phase to continuous phase, surface tension between the two phases, and contact angle have signicant inuences on droplet generation. [21][22][23][24] Whereas the ratio of surface to volume is high, the interaction between solid wall and uids can signicantly affect droplet generation 25,26 and many researchers have found that the geometry of the Tjunction is a crucial factor in droplet formation.…”