Some Modern Optical Methods for the Diagnostics of Processes in Multiphase Granular Media

摘要

Modern optical methods (mainly, immersion tomography) for studying the fluid flow and heat and mass processes in a granular medium flooded with a liquid are described. The transparency of this composite medium is provided by an appropriate choice of the refractive index of the saturating liquid. This makes it possible to use all available visualization methods, including polarization interference microscopy, for obtaining the information on the processes proceeding in the medium. Applications of the method to different engineering problems are discussed.