Robin P. Mooney

Learn More
The Bridgman furnace is widely used in industry and research. This paper outlines a working 1-dimensional model for tracking the columnar solidification front in a Bridgman furnace where the pulling velocity, and hence front position, change as a function of time. The front tracking model is applied to a fixed grid of control volumes using an explicit(More)
Direct measurement of heat flux and heat transfer coefficients in a Bridgman furnace is not always possible using traditional methods. This study characterised a vertical tubular Bridgman furnace using experimental data so that the estimated heat flux and heat transfer coefficients may be used in simulations of future experiments using the same furnace. An(More)
Numerical model verification is a prerequisite to model validation. However, verification can be difficult if an analytical solution is not available for the normally complex problem that the numerical model is setting out to address. This article aims to formally verify a Bridgman furnace solidification front tracking model code in a steady state scenario.(More)
Computer modelling has become an important aspect of engineering science and technology. Bespoke computer models are routinely under development and are often applied to specific manufacturing and materials processes. Solidification processes (casting, for example) is no exception and significant numbers of modelling approaches for solidification are(More)
Columnar to equiaxed transition (CET) was studied in a peritectic TiAl-based alloy with chemical composition Ti-45.1Al-4.9Nb-0.25C-0.2B (at.%). Solidification experiments were conducted in a Bridgman-type apparatus using cylindrical moulds made of high-purity Y 2 O 3. The methodology containing appropriate etching and observations under flat light in(More)
Psychotropic medications may produce a toxic confusional state, especially in elderly patients. Tricylcic antidepressants particularly, and the phenothiazines to a lesser extent, may induce these behavioral changes by their anticholinergic activity. The situation may be compounded by the use of more than one psychotropic drug or the addition of an(More)
The authors point out that manic-depressive illness is often not diagnosed in mentally retarded patients because they are already regarded as "different." They discuss the use of lithium carbonate as a prophylactic agent in the treatment of manic-depressive illness in mentally retarded patients and present three case histories illustrating some of the(More)
  • 1