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 14.0 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 be shown explicitly. In this tutorial, you will use the Eulerian multiphase model and discrete phase model. For details about these models, see Sections 26.5 and 25.2 for Setting Up the Eulerian Model and Steps for Using the Discrete Phase Models respectively in ANSYS FLUENT 14.0 User’s Guide. Assuming that you are using a quad core single processor machine with a clock speed of 3.80 GHz, this tutorial will take approximately 25 hours for the calculation. Problem Description A vertical riser has an air inlet at bottom. Particles are injected from a side at some height close to the inlet. The schematic of the setup is as shown in Figure 1. c ANSYS, Inc. March 7, 2012 1
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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 aparticle 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 fromANSYS FLUENT 14.0 Tutorial Guide, and that you are familiar with the ANSYS FLUENTnavigation pane and menu structure. Some steps in the setup and solution procedure willnot be shown explicitly.
In this tutorial, you will use the Eulerian multiphase model and discrete phase model. Fordetails about these models, see Sections 26.5 and 25.2 for Setting Up the Eulerian Modeland Steps for Using the Discrete Phase Models respectively in ANSYS FLUENT 14.0 User’sGuide.
Assuming that you are using a quad core single processor machine with a clock speed of 3.80GHz, this tutorial will take approximately 25 hours for the calculation.
Problem Description
A vertical riser has an air inlet at bottom. Particles are injected from a side at some heightclose to the inlet. The schematic of the setup is as shown in Figure 1.
Tutorial: Riser Simulation Using Dense Discrete Phase Model
3. Check the mesh (see Figure 2).
General −→ Check
ANSYS FLUENT will perform various checks on the mesh and will report the progressin the console. Make sure the minimum volume reported is a positive number.
Figure 2: Mesh Display
Step 3: Models
1. Select the Eulerian multiphase model.
Models −→ Multiphase −→ Edit...
(a) Select Eulerian from the Model list.
(b) Enable Dense Discrete Phase Model.
(c) Click OK to close Multiphase Model dialog box.