Evaluation of Microgravity Heat Conductivity Measurements with FLUENT System
Microgravity experiments were executed to measure the convection free, pure heat conductivity and heat diffusivity parameters in molten metals. The application of well known numerical methods to evaluate the data collected under low gravity conditions was only partially successful. None of the methods (Crank-Nicolson, error function fitting or simple FEM model) could be used over the whole measured temperature range. The purpose of this work was to alleviate the previously experienced problems by using a commercially available finite value method package on high performance computers, to simulate the coupled thermal and fluid mechanical model in order to accurately determine the heat transport properties of Ga, Sn-Bi, Sn and Zn melts, and by incorporating device geometry data, compare the results to the values gathered from short time microgravity experiments.
P.J. Szabó, T. Réti, T. Czigány
V. Bánhidi "Evaluation of Microgravity Heat Conductivity Measurements with FLUENT System", Materials Science Forum, Vol. 589, pp. 287-292, 2008