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26.1 Using Adaption

Two significant advantages of the unstructured mesh capability in FLUENT are:

By using solution-adaptive refinement, you can add cells where they are needed in the mesh, thus enabling the features of the flow field to be better resolved. When adaption is used properly, the resulting mesh is optimal for the flow solution because the solution is used to determine where more cells need to be added. Thus, computational resources are not wasted by the inclusion of unnecessary cells, as it occurs in the structured grid approach. Also, the effect of mesh refinement on the solution can be studied without completely regenerating the mesh.

Note:   When you perform mesh adaption in a parallel computation, a load balancing step will be performed by FLUENT by default.

You can turn off the automatic load balancing using the following TUI command:

        (disable-load-balance-after-adaption)

To return to the default behavior, use the following command:

        (enable-load-balance-after-adaption)

The automatic load balancing will not occur in conjunction with dynamic adaption. See Section  26.5 for information on dynamic adaption, and Section  31.6.2 for information on load balancing in parallel FLUENT.




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