We measure the flow of granular materials inside a quasi-two-dimensional silo as it drains and compare the data with some existing models. The particles inside the silo are imaged and tracked with unprecedented resolution in both space and time to obtain their velocity and diffusion properties. The data obtained by varying the orifice width and the hopper angle allow us to thoroughly test model...

because of its kinetic nature and computational advantages, the lattice boltzmann method (lbm) has been well accepted as a useful tool to simulate micro-scale flows. the slip boundary model plays a crucial role in the accuracy of solutions for micro-channel flow simulations. the most used slip boundary condition is the maxwell slip model. the results of maxwell slip model are affected by the ac...

Experiments were performed to understand the impact of orifice on droplet size in shear breakup region. Oil jet was released vertically from two types: a pipe and converging nozzle. The roll-up vortices observed clearly near edge with nozzle while elongated oil ligaments direction mostly orifice. droplets shed field layer increased along for both types. At different distances orifice, character...

The topic of the behaviour jets issuing from an orifice in lateral wall a pipe is interest many engineering fields, such as sea discharges pollutants via submerged pipes, diffusers to mix different fluids tanks and reactors, leakage industrial civil pipelines, etc. Most previous researches focuses on pressure loss across orifice, without taking into account modification internal flow and, most ...

BACKGROUND AND OBJECTIVES Natural orifice transluminal endoscopic surgery involves the introduction of instruments through a natural orifice into the peritoneal cavity to perform diagnostic and therapeutic surgical interventions. We report the utilization of the vaginal opening at the time of laparoscopic-assisted vaginal hysterectomy or total laparoscopic hysterectomy as a natural orifice for ...

Thermal properties of cryogenic fluids can profoundly change the nature cavitation since fluid pressure drop is not, anymore, only driving parameter this phenomenon. In research, we have conducted experiments inducing via a cylindrical orifice using Liquid Nitrogen as working and exploring regimes going from bubbly to full flashing. Among others, performed unsteady measurements derive speed sou...

As a successive alkalinity-producing system pond for purifying mine drainage is operated, sediment accumulates in the limestone layer of pond, and as amount accumulated increases, water permeability treatment efficiency decrease. Hence, flushing required, comprising network perforated pipes installed layers, to periodically discharge outside. The performance depends on four distinct characteris...

We present the results of both experimental and numerical investigations silo discharge for a cohesive granular material. In our study, thanks to cohesion-controlled material (CCGM) we propose investigate effect length l c , on two different configurations, one axisymmetrical, quasi-2D rectangular silo. an adjustable bottom is used control size orifice. As observed cohesionless by previous stud...