13 research outputs found
Entomopathogenic nematodes for the control of phorid and sciarid flies in mushroom crops
Report of the investigation of user requirements of large scale digital map data 1982-1992
3.50SIGLEAvailable from British Library Lending Division - LD:GPB-5412 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Modelling of droplet dynamic and thermal histories during spray forming—III. Analysis of spray solid fraction
A finite element modeling analysis of flow and mass transfer through nonspherical bubbles in a copper converter
Microstructural features and heat flow analysis of atomized and spray-formed Al-Fe-V-Si alloy
Gas Atomization of Amorphous Aluminum: Part I. Thermal Behavior Calculations
In this article, the thermal history and cooling rate experienced by gas-atomized Al-based amorphous powders were studied via numerical simulations. Modeling simulations were based on the assumption of Newtonian cooling with forced convection, as well as an energy balance, which involves gas dynamics, droplet dynamics, and heat transfer between gas and droplet. To render the problem tractable, phase transformations, crystal nucleation, and growth were not taken into account in the analysis of the solidification of Al droplets; instead, an energy balance approach was formulated and used. The numerical results and associated analysis were used to optimize processing parameters during gas atomization of Al-based amorphous powder. The results showed that the cooling rate of droplets increases with decreasing powder size and can reach in excess of 105Â K/s for powder <20Â ÎĽm in diameter. Gas composition has a more significant influence on cooling rate than gas pressure, and 100 pct He has the highest cooling effect. The results also showed that the cooling rate increases with increasing melt superheat temperature