Prof. Afina Lupulescu


Rensselaer Polytechnic Institute


Monday, December 1, 2003 - 4:00pm


MSTB 254

Dendrites (tree-like crystals) have a profound influence upon the engineering properties of metals, including the material's mechanical, chemical, and electrical responses. The Mullins-Sekerka shape instability provides the fundamental cause for the formation of highly complex, dendritic shapes observed in both natural freezing processes, and in technical applications (casting, welding). Kinetics of melting pivalic acid dendrites was observed under convection-free conditions on the space shuttle Columbia launched in 1997 as STS-87. At low melting Stefan numbers, St