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Title
Question
While it is understandable to not have a GUI for solver, isn't it very difficult to visualise and name vertices and blocks for meshing? Doesn't it warrant having some sort of 3D modeller tool for meshing?
Are there any such opensource meshers available?

OpenFOAM-version-7 Creating-3D-Pipe-Geometry-and-Mesh-in-OpenFOAM 03-04 min 30-40 sec 26-09-20, 2:57 p.m. divyesh7

Answers:

A gui based meshing tool is very helpful. Gmesh is one such open source tool available. many real life problems require complex geometries with very high magnitude of nodes. In such cases with the huge mesh, rendering a GUI can be very taxing on the computer. Therefore a script based meshing tool proves to be beneficial.

But for the purposes of learning, definitely a gui can help.
26-09-20, 3:25 p.m. ameyak2310

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