Abstract The present study analyzes conjugate heat transfer in a differentially heated square cavity. left wall of the cavity is cooled, and right while horizontal walls are adiabatic. Normalized continuity, momentum energy transport equations were solved with aid COMSOL Multiphysics 5.4 software. effects Rayleigh number range 10 2 ? RA 6 Prandtl 0.71 PR 100 on streamlines, isotherms, overall r...

The rated quality and intelligibility of speech processed by hearing aids in which the low-frequency output had been reduced by either electronic modification (low-cut tone controls) or acoustic modification (vented or open earmolds) was investigated. Fifteen subjects with high-frequency hearing loss provided data for nine commercial hearing aids and both high and low background noise levels. R...

A mathematical model has been developed to investigate the effect of a sprinkler spray on adjacent horizontal smoke venting and in particular the water droplet drag component. The pressure difference across a roof vent and the volumetric flow of smoke vented are determined by considering the interaction between the drag force of the sprinkler spray and the buoyancy of the smoke layer in the spr...

An experimental campaign is undertaken in order to investigate the hydraulic features of a vertical drop shaft, also considering the influence of a venting system consisting of a coaxial vertical pipe, projecting within the drop shaft with different plunging rates. Three different flow regimes are observed: a “weir flow” for very low head values, where the flow profile is subject to the atmosph...