Solute distribution curves from several hundred ice columns doped with small amounts of HCl, HF, NH4OH, and NH4F were investigated with the log linear approximate solution to the one-dimensional diffusion equation, discussed in an earlier paper. This led to the discovery of spontaneous convective effects which can be separated from a genuine concentration dependence of the distribution coefficient. The solutes studied show specific characteristics with respect to solubility in ice and concentration dependence of the distribution coefficient. These characteristic properties should eventually be correlated with specific structural relationships of these solutes (and the defects they create) to the ice lattice. The method of interpretation may be useful for unraveling the freezing history of natural ices of dilute solute content. The most direct and accurate method for measuring the distribution coefficient of (nonvolatile) solutes is by a combination of intense stirring and slow freezing rates.
This study is directed toward the analysis of a reactor model that is thermally nonlinear. The significant sources of feedback in the closed-loop model are dilatational changes of the fuel due to axial expansion caused by temperature and metallurgical phase changes. The dynamics of this phenomena have been represented on the PACE electronic analogue computer.The model was subjected to unusually large inputs of sinusoidal power and did not show any drastic tendencies toward being unstable.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.