2014 A constant temperature hot wire is located near and below a free surface. In certain conditions, oscillatory deformations of the free surface are observed. The onset temperatures and frequencies have been determined versus the distance between the wire and the surface for four different silicon oils. J. Physique 46 (1985) 1501-1506 SEPTEMBRE 1985,

The effect of limited spatial resolution for hot-wire anemometry (HWA) is investigated by analysing the two-dimensional energy spectra from direct numerical simulation (DNS) of turbulent channel flow at Reτ ≈ 950. Various spanwise filter lengths are applied to the streamwise velocity components in order to mimic the limited spatial resolution of a single-normal hot-wire experiment. Clear attenu...

This study investigates the influence of resistive pre-heating feedstock wire (here called hot-wire) on stability laser-directed energy deposition Duplex stainless steel. Data acquired online during depositions as well metallographic investigations revealed process characteristic and its window. The data, such electrical signals in circuit images captured from side-view interaction zone gave in...

A transient hot-wire apparatus was used to measure the thermal conductivity of argon with both steady-state and transient methods. The effects of wire diameter, eccentricity of the wire in the cavity, axial conduction, and natural convection were accounted for in the analysis of the steady-state measurements. Based on measurements on argon, the relative uncertainty at the 95 % level of confiden...

A computer program was developed to predict the dispersion of gas pollutant in the atmosphere. This program relies on puff method, and in order to consider the wind shear effects, the program has the ability to consider the complete dynamic and unsteady atmospheric conditions. Plume rise of hot pollutants due to buoyancy effects was also considered. The program has the capacity to perform the r...

Hot-wire cutting is a common material removal process used to shape and sculpt plastic foam materials, such as expanded polystyrene (EPS). Due to the low cost and sculpt-ability of plastic foams they are popular materials for large sized (> 1 m3) prototypes and bespoke visual artefacts. Recent developments in robotic foam sculpting machines have greatly increased the ability of hot-tools to scu...