Crystal Particle Adhesion to HT Surfaces in Falling Film Flow: A Computational Study, 18PaperCon

Performance of evaporator suffers from rapid heat transfer surface fouling. Fouling lowers heat transfer rate and eventually leads to evaporator shut down. It has been shown that the falling film hydrodynamic is complex with nonlinear wave formation and regions of low wall shear stress and flow recirculation.  This study focuses on the mechanism of particle adhesion to the heat transfer surface under shear flow.  The process of particle adhesion in falling film flow covers a wide range of length scales. The film thickness is in the order of millimeters, the particles/crystals are micron size, and adhesion occurs in sub-micron range. A multiscale computational model of the flow physics and hydrodynamics of falling liquid films with crystallization is developed to explicitly account for the presence of crystals in the liquid film. Experimentally measured mass deposit rate of CaSO4 crystals is used for model validation. Key parameters like flow rate, fluid viscosity and number of surface nuclei sites are also studies numerically.   

TAPPI conference proceedings and presentations, technical papers, and publication articles provide technical and management data and solutions on topics covering the Pulp, Paper, Tissue, Corrugated Packaging, Flexible Packaging, Nanotechnology and Converting Industries.

Simply select the quantity, add to your cart and your conference paper, presentation or article will be available for immediate download.