Several studies suggest that welding is detrimental to the male reproductive system. Welding fume and radiant heat are of interest as possible causal factors. This study investigates semen quality and sex hormone concentrations among 17 manual metal arc alloyed steel welders with a moderate exposure to radiant heat (globe temperature ranging from 31.1 degrees to 44.8 degrees C), but without sub...

This synopsis discusses our development efforts in the area of resonant holographic interferometry (RHI). RHI is a completely nonintrusive optical diagnostic suitable for a wide range of gas dynamic investigations. As described in previous reports, RHI is a hybrid technique that combines the multi-dimensional imaging capability of holography, the phase sensitive detection of interferometry, and...

Large-eddy simulation of a jet flame in a hot diluted coflow has been performed. The burner under consideration was operated in the moderate and intense low oxygen dilution (MILD) combustion regime, and utilizes a three-stream feed system to supply fuel, diluted coflow, and air to the burner (Dally, B. B., Karpetis, A. N., and Barlow, R. S., Proc. Combust. Inst., Vol. 29, 2002, pp. 1147–1154). ...

The fundamental phenomenological equations of radiative transfer, e.g., Lambert's cosine rule and the radiant transport equation, are derived from an analysis based on the Cauchy flux theory of continuum mechanics. For the classical case, where the radiance is distributed regularly over the unit sphere, it is shown that Lambert's rule follows from a balance law for the transfer of radiative pow...

The current study involves developing a three-dimensional transient finite element (FE) model to evaluate the thermal performance of an attic radiant barrier system (ARBS) as an energy efficient technology. The heat transfer modes of convection, radiation, and conduction were considered in the FE model. The results from the FE analysis were then validated based on hourly experimental data colle...

A higher-order, embedded boundary projection method for axisymmetric, unsteady, low-Mach number combustion is used to model a natural gas ame from a 300kW IFRF burner in the Burner Engineering Research Laboratory (BERL) at Sandia National Laboratory under hot wall conditions. The numerical predictions presented are the late simulated-time results of a computation of unsteady ow in the furnace. ...

The goal of the latest strategy in glass companies is to decrease the cost of production while maintaining or increasing the glass quality. There are several perspective ways leading to this goal: Optimization of the heating system, Modification of the furnace design, or Installing the new advanced control system. Optimization of the heating system can be achieved by installing modern burner sy...