DESCRIPTION OF A FILM FLOW BY ENTROPY VAL UATION

A theoretical model for description of structure formation processes i n fluids by Naue [1] is applicated for film flow. The optimum of such processes can be defined from maximum of information entropy. A turbul ent additive velocity for optimal momentum disproportionation is prese nted in dependence of mean flow rate. This additiv velocity is used fo r definition of multi-dimensional extension from turbulent motion stru ctures. A formation of (general) reynolds-number for film flow can be determined with application of these turbulence characteristics. The s pecial cases of plane film flow and tube flow are able derivated. The characteristic of stability boundaries for extension from n-dimensiona l structure elements is conneted with definition from critical film re ynolds-number. A comparison from these theoretical characteristics wit h experimental experiences of other authors demonstrates a very good a greement. The alteration of onedimensional extension from structural e lements in reference to critical quantities is used for calculation fr om turbulent film thickness. A theoretical relation predicts a model f rom Brauer [2] with excelent identity.