Are you a CFD engineer? Have you ever faced trouble doing meshing because of CAD issues like complexity in CAD model and CAD data loss while importing CAD geometry in CFD tools? Do you want to know how to do CAD repair and how to get geometry ready for analysis? Its necessity, process and how to do CAD-Repair? Being a CFD analyst do you want to know how to extract CFD domain and how to simplify the task of creating good quality mesh that is required for CFD analysis?

Knowing about the grid generation process as discussed in our earlier blog, Grid Generation for CFD Simulation: Introduction, we have seen what is a mesh, how a mesh is created using a software, what are mesh types etc. However once a mesh is created the challenge remains to assure that a given mesh is good & would generate accurate results. So there are some terminologies associated with mesh quality & let us know them.

After 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.

Meshing is a very critical part within the CFD simulation process. Meshing process dictates the simulation time as well as accuracy. Using a highly accurate solver on a very coarse and poor quality mesh, will lead to non-physical or highly inaccurate simulation results. Hence meshing skills, capability and a strong meshing tool are as much of interest as the solver capabilities. Meshing process is a tricky business, during which the user has to maintain sufficiently accurate mesh density as well as ensure that the mesh count is not impractically high.

Geometry And Mesh Building Intelligent Toolkit commonly know as GAMBIT was one of the main pre processing tool of Fluent.In 2006 with the acquisition by ANSYS, things started to change. Initially ICEM CFD became main pre -processor for CFD simulation for ANSYS. With various acquisitions over the years ANSYS have acquired various products like GAMBIT, T-Grid, ICEM-CFD,

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