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Be careful and use your engineering judgement (in collaboration with your colleagues and team members) to ensure that you do not neglect geometric features which may have an effect on the physics or critical flow features! Small details such as fillets or bolt heads are often insignificant details which can be assumed to have no impact on the final solution (especially in terms of a key engineering quantity such as lift, drag, max velocity, max temperature, etc.). Within the ANSYS geometry products there are semi-automated cleanup options that can remove holes, spikes, sliver surfaces and other CAD related features that will cause meshing issues.

The aim at this stage is to make sure that the geometry is as clean as possible before we create the fluid domain either in or around the body. In our experience, our ANSYS CFD customers become more confident and efficient with meshing as they gain a better understanding of the importance of certain mesh settings and the likely effect of these settings on final solution accuracy.Īfter defining your project scope and the key variables of interest (either geometric and/or boundary/operational conditions), the first step is to prepare the geometry and create the fluid domain for the CFD simulation. Meshing is one of the most important influences on CFD simulation accuracy, although it does not necessarily need to be the most time intensive.

The topics for this first series of blog entries will focus on the selection of efficient and appropriate meshing methods, mesh sizing and mesh controls in ANSYS Workbench Meshing. Welcome to the first in LEAP's series of CFD Tips & Tricks blogs.