## Chapter 23: Mesh Adaption

Mesh Adaption in CFX is the process by which the mesh is selectively refined in areas that are affected by the adaption criteria specified. This means that as the solution is calculated, the mesh can automatically be made finer or coarser in locations where solution variables change rapidly, in order to resolve the features of the flow in these regions.

Each mesh element is given an Adaption Level. Each time the element is split into smaller elements, the new elements are assigned an Adaption Level that is one greater than the element it was generated from. The maximum number of Adaption Levels is controlled to prevent over-refinement.

In CFX, mesh adaption is only available for single domain, steady-state problems with limited physics. A full list of limitations can be found in Mesh Adaption Limitations in the CFX-Solver Theory Guide. The Mesh Adaption process is performed by CFX-Solver. However, the parameters that control the Adaption process are defined in CFX-Pre on the Mesh Adaption form.

This chapter describes:

- Overview

- Setting Up Mesh Adaption

- The Details View for Mesh Adaption

- Advanced Topic: Adaption with 2D Meshes

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