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Chapter 10: Using Multiple Reference Frames

This tutorial is divided into the following sections:

10.1.Introduction

10.2.Prerequisites

10.3.Problem Description

10.4.Setup and Solution

10.5.Summary

10.6.Further Improvements

10.1. Introduction

In this tutorial, you will setup a general fluid flow simulation to evaluate the performance of a centrifugal pump with a volute.

This tutorial demonstrates how to do the following:

•Set up a mesh interface.

•Describe wall motion and other boundary conditions.

•Specify appropriate solver settings.

•Add and monitor expressions.

•Calculate expressions and display contours.

10.2. Prerequisites

This tutorial is written with the assumption that you have completed one or more of the introductory tutorials (Fluid Flow and Heat Transfer in a Mixing Elbow (p. 35)) found in this manual and that you are familiar with the ANSYS Fluent tree and ribbon structure. Some steps in the setup and solution procedure will not be shown explicitly.

10.3. Problem Description

The problem to be considered is the modeling of a centrifugal pump with a volute as shown in Figure 10.1: Case Geometry (p. 356). The pump impeller has 5 blades and rotates at a velocity of 1450 RPM. The mass flow rate at the volute outlet is known to be 77.5 kg/s. A gauge total pressure of 0 pa is used at the inlet. The simulation will be performed to determine the head generated by the pump, representing the overall pressure increase of the fluid.

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