Introduction

This tutorial illustrates the setup and solution of a three-dimensional turbulent fluid flow and heat transfer problem in a mixing elbow. The mixing elbow configuration is encountered in piping systems in power plants and process industries . It is often important to predict the flow field and temperature field in the area of the mixing region in order to properly design the junction.

This tutorial demonstrates how to do the following:

• Launch ANSYS FLUENT.

• Read an existing mesh file into ANSYS FLUENT.

• Use mixed units to define the geometry and fluid properties.

• Set material properties and boundary conditions for a turbulent forced convection problem.

• Initiate the calculation with residual plotting.

• Calculate a solution using the pressure-based solver.

• Visually examine the flow and temperature fields using the postprocessing tools available in ANSYS FLUENT.

• Enable the second-order discretization scheme for improved prediction of the temperature field.

• Adapt the mesh based on the temperature gradient to further improve the prediction of the temperature field.