Computational Fluid Dynamics (CFD) to be simply put in layman's terms, defines the interaction of fluids with any obstacle. These interactions can be studied through experimentation and simulations. Although experimentation has been the traditional approach to study fluid flow and interactions, the way CFD is explored has undergone a massive shift with the advancements of simulation programs. For water and coastal modeling, water modeling tools have been developed and released into the market that can run multiple and repetitive simulations all whilst allowing for the possibility of changing the initial parameters. The development of such tools incurs a cost and comes with a cost to the user. With the advent of open-source tools which is a result of increased access to the internet and connectivity between scholars around the globe, numerical modeling tools are available as open-source programs rather than as a product. The benefits of working with an open-source tool come from the plausibility of any researcher from any part of the world being able to understand the core of the program and make any additions to the program itself as needed. This increases the capacity of the tool to be upgraded continuously. This paper aims to show the vast potential that the tool REEF3D holds through a case study of a CFD simulation all while highlighting how open-source tools can create a major impact on the field of CFD