Product Overview

In this tutorial, you’ll learn how to write a custom boundary condition in OpenFOAM using the codedFixedValue feature. This step-by-step guide walks you through programming a user-defined inlet condition to model fully developed laminar flow in a rectangular channel—a classic Hagen–Poiseuille flow scenario.

The tutorial compares two inlet conditions:

1. A constant velocity profile

2. A parabolic velocity profile (representing fully developed flow)

By the end of this lesson, you’ll be equipped to define and program velocity profiles using C++ directly within OpenFOAM, giving you more control over your simulation setups.