Chapter 23: Using the Eulerian Multiphase Model for Granular FlowThis tutorial is divided into the following sections:23.1. Introduction23.2. Prerequisites23.3. Problem Description23.4. Setup and Solution23.5. Summary23.6. Further Improvements23.1. IntroductionMixing tanks are used to maintain solid particles or droplets of heavy fluids in suspension. Mixing maybe required to enhance reaction during chemical processing or to prevent sedimentation. In this tutorial,you will use the Eulerian multiphase model to solve the particle suspension problem.The Eulerianmultiphase model solves momentum equations for each of the phases, which are allowed to mix in anyproportion.This tutorial demonstrates how to do the following:•Use the granular Eulerian multiphase model.•Specify fixed velocities with a user-defined function (UDF) to simulate an impeller.•Set boundary conditions for internal flow.•Calculate a solution using the pressure-based solver.•Solve a time-accurate transient problem.23.2. PrerequisitesThis tutorial is written with the assumption that you have completed one or more of the introductorytutorials found in this manual:•Introduction to Using ANSYS FLUENT in ANSYS Workbench: Fluid Flow and Heat Transfer in a MixingElbow (p. 1)•Parametric Analysis in ANSYS Workbench Using ANSYS FLUENT (p. 77)•Introduction to Using ANSYS FLUENT: Fluid Flow and Heat Transfer in a Mixing Elbow (p. 131)and that you are familiar with the ANSYS FLUENT navigation pane and menu structure. Some steps inthe setup and solution procedure will not be shown explicitly.23.3. Problem DescriptionThe problem involves the transient startup of an impeller-driven mixing tank.The primary phase iswater, while the secondary phase consists of sand particles with...
