The separation process of oily water using membranes has attracted the attention researchers and engineers. greater problem in use membrane is reduction permeate flux due to clogged pores by oil deposition inside or effect concentration polarization. For this purpose, a theoretical study water/oil module was performed. This device consists tubular ceramic provided with rectangular inlet section...

In single-bend channels or meandering channels, groynes are widely used as a river-training structure. Geometric factor is an important principle of groyne design. this paper, the numerical method based on Renormalization Group (RNG) k-ε turbulence model to study effects with different lengths and orientations mean flow pattern characteristics in mildly channel. The analysis shows that compared...

This study investigates the effects of elbow on transition and development multiphase flow using computational fluid dynamics modelling techniques. The Eulerian - Multifluid VOF model coupled with an Interfacial Area Transport Equation has been employed to simulate air-water two-phase in a pipe two standard 90 degree elbows mounted series. Turbulence were accounted for by RNG k-ε model. separat...

Abstract Stepped spillways are suitable and economical options for high-storage dams that require significant energy dissipation, structural adaptation to roller-compacted concrete dams, spontaneous flow aeration. In this study, a numerical analysis of the hydraulic characteristics skimming regime stepped spillway Zirdan Dam is carried out. A comparison between smooth provided. By preparing mod...

In this article, the optimization of a twisted strip heat exchanger was explored aiming at enhancing transfer. To end, governing equations using ANSYS-FLUENT software and nanofluid flow k-ε RNG turbulence model were simulated in exchanger, respectively. The investigated parameters included temperature, pressure, velocity, kinetic energy (TKE), concentration, shape factor, Reynolds number, diame...

Laboratory experiments examining the possibility of direct mind-matter interactions have been reported for over a century. Two classes of such experiments reported most frequently include tossing dice while maintaining the intention for certain die faces to appear, and mental influence of truly random bits generated by electronic random number generators (RNG). Earlier metaanalyses of publicati...

ABSTRACT The flow of air past a smooth surface-mounted hemisphere is investigated numerically using six common RANS turbulence models and seeking steady solutions. Where possible, the are applied standard wall functions, resolving viscous sublayer, enhanced treatment option in ANSYS Fluent. Results simulations compared against measurements taken wind tunnel experiment. comparison shows that bou...

Implicit learning is often assumed to be an effortless process. However, some artificial grammar learning and sequence learning studies using dual tasks seem to suggest that attention is essential for implicit learning to occur. This discrepancy probably results from the specific type of secondary task that is used. Different secondary tasks may engage attentional resources differently and ther...