Introduction

This tutorial was run using ANSYS FLUENT 12.1. The results have been updated to reflect the change in the default setting of node-based smoothing for the surface tension calculation.

This tutorial examines the flow of ink as it is ejected from the nozzle of a printhead in an inkjet printer. Using ANSYS FLUENT's volume of fluid (VOF) multiphase modeling capability, you will be able to predict the shape and motion of the resulting droplets in an air chamber.

This tutorial demonstrates how to do the following:

• Set up and solve a transient problem using the pressure-based solver and VOF model.

• Copy material from the property database.

• Define time-dependent boundary conditions with a user-defined function (UDF).

• Patch initial conditions in a subset of the domain.

• Automatically save data files at defined points during the solution.

• Examine the flow and interface of the two fluids using volume fraction contours.