When a positively buoyant vertical fluid jet directed downwards from its source impinges on a horizontal flat surface, the resulting flow is termed an “impinging fountain”. These flows arise in a number of practical situations, for example, in gas metal arc welding (GMAW). Developing a description of this flow presents the researcher with a number of challenges and forms the motivation for this...

Steady, incompressible flow solutions are found numerically for a radially expanding liquid sheet in order to confirm analytical results for inviscid flow and to investigate viscous and nonlinear effects. An hp-finite element method is used to perform the numerical simulations. Comparisons are made to theoretical predictions of the radius where the sheet becomes unstable. To determine the criti...

the steps taken in designing a loop reactor for bulk propylene polymerization are discussed. the roles played by several parameters like particle growth factor, catalyst activity and solid fraction on reactor volume at different operating conditions are investigated. at first, based on a fixed production capacity and specific rate of catalyst, reactor volume is determined. next, the length and ...

Emulsions formed by mixing reactant streams inside microdroplets are efficient microscale reactors for the synthesis of nano/microparticles/crystals due to small quantities reagents confined within each droplet and separation contents from reactor walls. In this work, size-tunable gold nanoparticles (AuNPs) emulsion droplets generated in a three-phase glass capillary microfluidic device was inv...

Radiation sensors based on thermo luminescence from nanoparticles of aluminium-boron complex for gamma radiation have been reported. Crystal chemistry aluminium boride is quite complicated and derived tetragonal modification boron. The crystal structure varies with the method preparation energy band gap contains defect states governed by temperature during synthesis. There are various methods p...

Olive oil is one excellence of the Italian food industry: around 300 kt yr−1 are produced, creating roughly same amount olive mill wastewater (OMW) to be disposed of. The present work describes a process exploit OMW by converting its organic compounds valuable gaseous biofuel. A sample was characterized (COD, TOC, solids, and polyphenols) submitted membrane filtration tests concentrate compound...

Abstract A continuous flow approach for the generation of phenyl glucosazone from glucose and hydrazine is reported giving pure target in 53% isolated yield. This thermal process generates product as an insoluble material that causes reactor fouling via adhering to walls. To overcome this issue a segmented was realised whereby streams air reaction solution were combined T-piece directed through...

The aim of this study was to determine the influence of environmental parameters onthe abundance of monkey goby Neogobius pallasi. A total of 526 and 163 individuals ofmonkey goby specimens were caught by electro-shocker in the Kaboodval and Shirabad Streams, respectively. The ranges of total length of the specimens in Kaboodval and Shirabad Streams were respectively 22-137.55 mm and 32.64-137....