in this study, aerodynamic characteristics of a circular cylinder in an axial flow have been investigated numerically and experimentally. the model has been considered as a cylinder with truncated nose and fineness ratio of 3 (length to diameter ratio of 3). the investigation involves a series of wind tunnel measurements, flow visualization, and numerical simulation. we used different mach numb...

In this paper, the size dependent behavior of the gold micro-switches has been studied. This behavior becomes noticeable for a structure when the characteristic size such as thickness or diameter is close to its internal length-scale parameter. The size dependent effect is insignificant for the high ratio of the characteristic size to the length-scale parameter, which is the case of the silicon...

A transient computational fluid dynamics (CFD) method based on dynamic mesh is adopted to investigate the static and performances of an annular seal with a tilted rotor. The reliability CFD verified by experimental data, then variations performance sealing under different length-diameter ratios misalignment angles are investigated method. results show that leakage flowrate decreases increasing ...

Background: Anatomical and histological studies of the spinal cord have always garnered anatomists’ attention because of their high importance in various fields of veterinary medicine, zoology and behavioral science. OBJECTIVES: This work was conducted to understand the detailed histomorphometric aspects of the spinal cord of Indian gray mongoose (Herpestes edwardsii). METHODS: Six adult Indian...

Poor pelleting ability of rice straw (RS) discourages its production and utilization as a biofuel. Woody biomass lignin are believed to improve the quality herbaceous agro-residual pellets. This study investigated influence length-to-diameter ratio (L/? = 6 10), pine sawdust (PS) (0, 20, 40 wt%) sodium lignosulfonate (SL) 10 20 on RS pellets produced via mini-pilot scale flat-die pellet mill. L...

in this study, bio-based carbon nanotubes (cnts) have received considerable research attention due to their comparative advantages of high level stability, simplistic use, low toxicity and overall environmental friendliness. new potentials for improvement in heat transfer applications are presented due to their high aspect ratio, high thermal conductivity and special surface area. phonons have ...

Abstract In order to further improve the flight stability of explosively formed projectile, formation method tail EFP was studied based on polygonal liner. Under hexagonal charge structure, fins can be when structural parameters are matched. Through numerical simulation LS-DYNA, influence liner (curvature radius, linear thickness), height and shell thickness velocity, length-diameter ratio, com...

the mixing behavior of the gas-liquid phase in three loop bioreactors was investigated. a gas-induced external airlift loop bioreactor (ealb), a forced-liquid vertical tubular loop bioreactor (vtlb) and a forced-liquid horizontal tubular loop bioreactor (htlb) were used for mixing studies as well as biomass production from natural gas. the effect of design parameters, riser to downcomer cross s...