Springer Verlag has been pleased to bring out this special volume on interfacial fluid dynamics and transport processes. There are seventeen articles and each article is written in a pedagogical manner dealing with relevant research issues and questions. The intended audience is post-doctoral scientists, academicians and graduate students intending to pursue research and it is our hope that this volume will have lasting value. Several issues arise within the general field of interfacial transport such as the instability of interfacial processes and driven flows. Instabilities occur when there is a sudden change in the structure of a solution as a control parameter is smoothly varied. They are usually accompanied by a change in the patterns in—fluid flow or temperature and concentration fields. Transport phenomena related instabilityattheinterfacehasmuchofitsoriginintheseminalworksofRayleigh whointhelaterpartof the19thcenturyworkedonjets,gravitationallyunstably stratified—fluid layers, and on the first ideas on convection. Some of these ideas were subsequently modified by the work of Marangoni, Block and Pearson on surface tension driven instabilities. Over the years similar concepts have found place in solidification and melting, electrodeposition, and other phase change problems.