Automatic Vs Manual Meshing: Which One is Right for You?

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There’s always a debate on choosing the right meshing technique for FEA and CFD simulations. Since meshing is an important part in any simulation process, it is imperative to ensure that a proper meshing technique is adopted. This is essentially a concern for most analysts as the simulation results hugely rely on mesh quality.

Automatic vs Manual Meshing

It is quite easy to differentiate a bad quality mesh applied on a model against a good one. However, it is very much complex to know whether the mesh model will solve the simulation purpose or not. Despite several mesh-less FEA and CFD codes, meshing is still an important parameter, utilized in most commercial solvers available today.

The process of subdividing the geometry in small number of elements is also a time consuming task, and as such, present available technologies provide users with automatic meshing feature to ease up the simulation process a bit. It is however also true that a mesh generated automatically might consist of errors and cause the results to deviate.

Manual meshing on the other hand is quite time-consuming but far more accurate. However, applying meshing to the geometry requires a good experience and knowledge about the system being simulated. While automatic meshing simply makes an educated guesses to resolve the geometry and produce a mesh model, it is the analyst who has to decide whether the model is acceptable or not, based on his experience.

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About the Author: Mehul Patel CFD specialist at Hi-Tech, is an expert at ANSYS FLUENT, OpenFOAM and many more. With more than 8 years of experience, Mehul has successfully planned, coordinated and executed CFD Projects for Aerodynamics, Combustion, Turbomachinery, Multi-phase flow & HVAC analysis. Mehul adept at co-ordination and QA/QC, handles a team of CFD engineers contributing to CFD projects for aviation, automotive, building design & construction, plant design and heavy engineering industries.

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