Why Green-Gauss Node Based Gradient Evaluation is preferred over default Green-Gauss cell Based in ANSYS FLUENT?
You can find the answer is here:
[CFD] Green-Gauss Cell-Based and Node-Based Gradient Schemes - YouTube
Hello Muhammad Shariq Khan,
this method is more accurate on meshes with higher mesh skewnesses. In most cases you should be using the Least-Squares Cell based methods however, which should be faster (and more accurate) than the Green-Gauss Node Based Gradient method, at least on static meshes, in the most cases.
If you have a dynamic mesh or "hanging nodes" in your mesh using the Green-Gauss Node Based Gradient method may be beneficial over the Least-Squared methods, at least of what I know of...
But Omer A. Alawi is right, if you do not know anything about these methods, search for the video on yt and draw your own conclusions.
Best regards
Christian
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