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in subjects: "Prisms"

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Computational economy improvements in PRISM

The PRISM piecewise solution mapping procedure, in which the solution of the chemical kinetic ODE system is parameterized with quadratic polynomials, is applied to CFD simulations of H{sub 2}+air combustion. Initial cost of polynomial construction is expensive, but it is recouped as the polynomial is reused. We present two methods that help us to parameterize only in places that will ultimately have high reuse. We also implement non-orthogonal Gosset factorial designs, that reduce polynomial co… more

Date: January 29, 2003

Creator: Tonse, Shaheen R. & Brown, Nancy J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Motion and Rotation of Small Glissile Dislocation Loops in Stress Fields

Atomistic computer simulations of small clusters of self-interstitials have revealed that these clusters are highly mobile along certain crystallographic directions. Their thermal mobility and Brownian motion along these directions rapidly decreases, however, as the size of the cluster increases. A review of these computer simulations has been provided by Osetsky et al. [1], and more recent studies are given by Marian et al. [2]. All these studies have shown that the activation energy for clust… more

Date: September 29, 2003

Creator: Wolfer, W G & Okita, T