Ansys Fluent is a robust computational fluid dynamics (CFD) software that can analyze flow and heat transfer in diverse industrial settings and can handle complex flow and thermal issues with its built-in multiphase flow model. Fluent predicts temperature, pressure, turbulence intensity, and flow velocity for various applications, including open channel flow. The flow regime in open channel flow depends on the fluid depth and velocity, and the flow behavior is different in deep channels from shallow channels This tutorial video provides a step-by-step guide on setting up a model for open channel flow using the Volume-Of-Fluid (VOF) method in Fluent. The video covers the merging of two open channels into a larger trapezoidal-shaped channel and highlights the recirculation and intense interaction of open channel flow.