Mass transfer in a closed geometry container by diffusion and bulk motion is theoretically investigated. The governing expression is the Stefan-Maxwell equation. Fick's Second Law is shown to be a simplification of this equation which neglects the effects of the bulk motion of the gases. A numerical solution using Nike Free Womens Sale Uk
a finite difference approximation for the nonlinear Stefan-Maxwell equation is presented and the results compared to those obtained from the exact and numerical solution to the linear Fick's Second Law.
In this paper, we propose 260 randomly generated scheduling problems whose size is greater than that of the rare examples published. Such sizes correspond to real dimensions of industrial problems. The types of problems that we propose are: the permutation flow shop, the job shop and the open shop scheduling problems. We restrict ourselves to basic problems: the processing times are fixed, there are neither set-up times nor due dates nor release dates, etc. Then, the objective is the minimization of the makespan.
Based on the computed equilibrium temperature of evaporating dirty water-ice grains, dirty water-ice halo is examined, taking into account of a Buy Nike Roshe Run
size dependence of terminal velocity of dust at P/Halley. It is found that due to an enhanced grain's temperature caused by dirtiness, icy halo cannot extend over 100 km from the nucleus when comet approaches inside a solar distance r of 1 AU. Therefore, it is unlikely that the ice bands in the near infrared wavelengths could be detected in the cometary coma at r<1 AU.