Molecular dynamics study of the alloy (N2)67(Ar)29
Molecular dynamics calculations are used to investigate the effect of isobaric cooling on the hexagonal alloy (N2)67(Ar)29. Particular attention is given to the behavior of the reorientational motion of the N2 molecules. No orientational or structural transition was found to accompany the cooling from 60 to 10 K at either P = 4 × 103 or P = 1 × 103 bar (1 bar = 100 kPa). However, the power spectrum of the angular-velocity autocorrelation function clearly reveals the freezing out of rotational diffusion at low temperature.
In this paper, an optimization technique based on the Adaptive Response Surface Method (ARSM) is combined with a finite element solution of heat conduction to investigate an aircraft engine cooling problem. The overall purpose of this optimization is to improve the thermal effectiveness of an aircraft deicing strategy. The finite element procedure uses a two-dimensional discretization of an engine intake surface with quadrilateral, isoparametric elements. Based on a comparison between the ARSM predicted results and the plotted objective function, it is observed that the combined techniques provide an effective method for thermal optimization.