Tutorial: Riser Simulation Using Dense Discrete Phase Model

Introduction
The purpose of this tutorial is to demonstrate the setup of a dense discrete phase model (DDPM) with the example of 2D riser. DDPM is used for the secondary phase that has a particle size distribution. This tutorial demonstrates how to do the following: • Use Eulerian multiphase model. • Set up and use DDPM. • Solve the case using appropriate solver settings. • Postprocess the resulting data.

Prerequisites
This tutorial is written with the assumption that you have completed Tutorial 1 from ANSYS FLUENT 13.0 Tutorial Guide, and that you are familiar with the ANSYS FLUENT navigation pane and menu structure. Some steps in the setup and solution procedure will not …exibir mais conteúdo…

Diameter (m) Max. Diameter (m) Mean Diameter (m) Spread Parameter Value -0.0999 -0.95 1 1000 0.4 9e-05 0.00016 0.00013 9.6

(f) Enter the values for Last Point as shown in the following table: Parameter X-Position (m) Y-Position (m) X-Velocity (m) Value -0.0999 -0.95 1

(g) Select phase-2 from the Discrete Phase Domain drop-down list. (h) Click OK to close Set Injection Properties dialog box. 2. Close Injections dialog box. 3. Click OK to close Discrete Phase Model dialog box. Step 5: Materials Set the properties for anthracite. Materials −→ anthracite −→ Create/Edit...

1. Enter 2400 kg/m3 for Density. 2. Click Change/Create and close Create/Edit Materials dialog box.

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c ANSYS, Inc. February 24, 2011

Tutorial: Riser Simulation Using Dense Discrete Phase Model

Step 6: Phases 1. Define the primary (gas) phase. Phases −→ phase-1-Primary Phase −→ Edit...

(a) Enter gas for Name. (b) Select air from the Phase Material drop-down list. (c) Click OK to close the Primary Phase dialog box. 2. Define the secondary (solids) phase. Phases −→ phase-2-Secondary Phase −→ Edit...

(a) Enter solids for the Name. (b) Enable Granular. (c) Select gidaspow from the Granular Viscosity drop-down list. (d) Select lun-et-al from the Granular Bulk Viscosity drop-down list. 7

c ANSYS, Inc. February 24, 2011

Tutorial: Riser Simulation Using Dense Discrete Phase Model

(e) Click OK to close Discrete Phase dialog box. Step 7: Boundary Conditions