Post-processing : Extracting results out of the CFD model that has been solved, is called as post-processing. Solver : In the solver we import the meshed CAD model and solve the CFD problem specifying additional models like the physics, numerical computation methods etc. A few CAD models are shown below with their meshing. We generate the mesh, & specify the boundary conditions (B.C), then this entire meshed CAD model is exported to a CFD solver along with B.C. Within pre-processing we create the geometry, and perform clean-up so that unwanted parts if any are deleted or modified. Pre-processing means, before we move ahead to the solver we need to process CAD model in order to fit into the solver or provide the solver with the correct information. Pre-processing : Mesh generation is a combination of CAD model generation as well as CAD clean-up and termed as pre-processing in the entire CFD simulation process. Almost 50% of the CFD simulation time of any CFD engineer is involved into meshing or mesh generation and hence it is a critical part of the CFD simulation process that needs thorough understanding of the meshing/ grid generation steps. the better the mesh in quality, the more accurate results can be expected. Also the accuracy of the CFD simulation results is directly linked to meshing. Therefore meshing is an extremely critical part of CFD process and without understanding it we cannot proceed to solve or even expect any relevant results. So before we start any simulation study to get any result the first step followed is creating a mesh or a CFD CAD model. Within simulations we can analyse different aspects like structural, as well as thermal and fluid flow analysis, however the basis for all simulation softwares and studies is the mesh, also called a grid. Simulation is a broad subject area that is currently used to analyse or design products and processes. Grid Generation for CFD Simulation : IntroductionĪfter a brief introduction to computational fluid dynamics (CFD) in the earlier blog Introduction to CFD, let-us further try to understand and have greater insights into the meshing process in the pre-processing step of CFD simulations.
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