Ansys Polyflow provides several different remeshing methods, in order to satisfy the remeshing requirements for a variety of flow problems:

Remeshing rules that are topologically general (that is, Thompson transformation and elastic methods) will require more CPU time and memory than those that apply only to specific topologies, because they involve a wider coupling between the position variables and the other solution fields.

You will have to define the remeshing technique separately for each sub-task of a multiple-sub-task problem. Remeshing rules do not apply across sub-tasks. On the other hand, you can define different remeshing techniques for different subdomains associated with a given sub-task. This is referred to as local remeshing, and is discussed in Local Remeshing.

See Adaptive Meshing for information about adaptive meshing, which can be used with or without remeshing.