Numerical simulation of various structures multiphase flow in the pipe was performed using OpenFOAM software package. A visual comparison design for separated stratified-wave, plug and annular modes with experimental data is presented. For modelling solver compressibleInterFoam used. From results numerical modelling, it follows that package allows correct prediction depending on Reynolds number...

Hydrogen removal of H-supersaturated liquid steel produced in a hydrogen-rich environment an industrial vacuum degasser (VD) is simulated here using two-phase (argon–steel) Eulerian model. The dehydrogenation efficiency evaluated for series ladle plug layouts and argon-purging modes. Increasing the number from prototype double-plug to four or slightly prolonging degassing time triple-plug enabl...

Argon bottom stirring is commonly practiced in secondary steelmaking processes due to its positive effects on achieving uniform temperatures and chemical compositions throughout a steel melt. It can also be used facilitate slag metal refining reactions. The inter-mixing phenomena associated with argon gas injection through porous plugs set the efficiency summarized by evaluations of 95% mixing ...

evaluation and modeling of the wastewater treatment plants (wwtp) have to be based on thefact that the pollutant concentrations and flow rates change constantly. in addition, different approaches mustused due to there are different processes in a wwtp. a mexican petrochemical complex has a wwtp thatprocesses wastewaters from several petrochemical plants, where the flow rates and pollutant conce...

in this paper, modeling and optimization of fischer-tropsch synthesis is considered in a fixed-bed catalytic reactor using an industrial fe-cu-k catalyst. a one dimensional pseudo-homogenous plug flow model without axial dispersion is developed for converting syngas to heavy hydrocarbons. the effects of temperature, pressure, h2 to co ratio in feed stream, and co molar flow on the mass flow rat...

In this study, we present a method for determining the fastest moving particle (FMP) and residence time distribution (RTD) in a pilot-scale high temperature, short time (HTST) pasteurizer to ensure that laboratory or pilot-scale HTST apparatus meets the Pasteurized Milk Ordinance standards for pasteurization of milk and can be used for obtaining thermal inactivation data. The overall dimensions...

Endothelial microvilli that protrude into the capillary lumen, although invisible in the optical microscopy, may play an important role in the blood flow control in the capillaries. Because of the plug effects, the width of the gap between the capillary wall and the blood cell is especially critical for the blood flow dynamics in capillaries, while microvilli located on the capillary wall can e...

Plug flow behavior in tubular reactors is often highly desirable industry, since it can ensure high productivity, good selectivity, and enhanced heat transfer. To achieve this, radial mixing combined with poor axial required: these conditions are quite easy to obtain if the regime turbulent, but they much more challenging laminar. In this work residence time distributions a side-injected reacto...

background: this study assessed the removal of organic material and nutrients from full-scale subsurface flow (ssf) constructed wetlands (cws) followed by anaerobic stabilization ponds under environmental conditions. methods: the effluents were distributed evenly in 12 reed beds. samples were taken twice monthly for a total of 6 months from several points in the wetland. biochemical oxygen dema...