The double vortex-finder hydrocyclone formed by a coaxial insertion of an internal with smaller diameter inside the conventional single used to obtain two kinds products from and external overflows in one classification has attracted wide attention. To further improve performance hydrocyclone, effects length on were studied numerical simulation response surface modeling behavior fluid particle ...

In this study, two-dimensional pulsating unsteady flow of nanofluid through a rectangular channel with isothermal walls is investigated numerically. The set of resultant algebraic equations is solved simultaneously using SIMPLE algorithm to obtain the velocity and pressure distribution within the channel. The effects of several parameters, such as volume fraction of different nanoparticles, Rey...

in order to evaluate the effectiveness of the iranian made charcoal tubes in the field , 60 local made and 60 imported ones (skc type) were randomly selected and placed side by side for sampling aromatic hydrocarbons (including benzene, toluene, xylene) in workers breathing zone in a paint factory. the results indicated that there were no statistically significant differences between the mean c...

in this paper, convection heat transfer of al2o3-water nanofluid turbulent flow through internally ribbed tubes with different rib shapes (rectangular, trapezoidal and semi-circular) is numerically investigated. for each rib shape, the optimum geometric ratio and volume fraction were calculated using entropy generation minimization technique. the governing equations in steady state and axisymme...

a numerical model is developed to simulate the transport phenomena in the flow channel between parallel plates with porous and non-porous (or impermeable) walls. the continuity and momentum equations were solved first, assuming the wall reynolds number in the range of with the suction or injection of air at a speed equal to the uniform inlet velocity. the results show that at constant inlet and...

Reverse osmosis is a commonly used process in water desalination. Due to the scarcity of freshwater resources and wastewater problems, a lot of theory and experimental studies have been conducted to optimize this process. In the present study, the performance of reverse osmosis membrane module of salt–water separation was simulated based on computational fluid dynamics technique and solution-di...

The flow field of a bipolar plate distributes hydrogen and oxygen for polymer electrolyte membrane (PEM) fuel cells and removes the produced water from the fuel cells. It greatly influences the performance of fuel cells, especially regarding reduction of mass transport loss. Flow fields with good reactant distribution capability reduce the mass transport loss, thus allowing higher power density...

Although two-phase flow is frequently encountered in various location of the process plants, there is no a general accepted and verified two-phase flow model that may be used to size lines for such conditions. An obvious example is condensate water return lines. The API method that used in this study is based on the homogeneous equilibrium flow assumption, that is, equal velocity and equal temp...

release  volatile  organic  compounds  (vocs)  as  environmental  and  occupational  pollutant  cause  macro perspective affect such as climate change, humans and economic consequences. although fixed bed absorber is widely used as a controlling method because of its economically and availability, but these absorbers are facing some issue like high pressure drop, non-uniform distribution of flu...