Numerical prediction of deposition in two-phase flow in vertical pipes

This article presents a model for particle deposition in two-phase flow in vertical pipes. There are three interacting modules in the model: Fluid Transport to predict velocity and pressure, Particle Transport to predict particle distribution and Particle Deposition to predict actual attachment of particles onto surfaces. Derivation of the governing equations is presented with the numerical solution procedure outlined. For verification, limiting cases with known solutions are considered. For validations, two-phase flows without deposition are considered. Upon verifications and validations, the model is employed to investigate particle deposition in two-phase flow with different flow patterns in both constant and variable cross section pipes, directly demonstrated the need to account for finite deposit thickness.