The process of CFD simulation typically involves several key steps. First, a geometric model of the system is created using computer-aided design (CAD) software. This model is then meshed into a finite number of smaller elements, known as a computational grid. The governing equations of fluid dynamics, such as the Navier-Stokes equations, are discretized and solved numerically on this grid. Boundary conditions, which define the interactions between the fluid and the surrounding environment, are also specified. The simulation is then run on a computer, and the results are analyzed to gain insights into the fluid flow behavior.
CFD simulation has several advantages over traditional experimental methods. It allows for the rapid and cost-effective evaluation of design alternatives, the identification of potential flow issues, and the optimization of fluid systems. Additionally, CFD simulations can provide detailed information about flow phenomena that may be difficult or impossible to measure experimentally. However, CFD simulation also has its limitations. The accuracy of the results depends on the quality of the geometric model, the mesh, and the choice of numerical methods. Furthermore, CFD simulations can be computationally intensive and may require significant computational resources.
In recent years, advancements in computer hardware and software have made CFD simulation more accessible and powerful. High-performance computing clusters and parallel processing techniques have enabled the simulation of complex fluid flow problems with greater accuracy and efficiency. Additionally, the development of advanced turbulence models and mesh generation algorithms has improved the reliability and robustness of CFD simulations. As a result, CFD simulation has become an essential tool in the design and analysis of fluid systems across a wide range of industries.