Fluids nCache > Merge
Caches
Merges your current fluid effect’s enabled caches and disables the cache nodes that are merged. By default, this operation does not delete any of your fluids cache nodes.
Fluids nCache > Merge
Caches > 
Opens the Merge Fluid Cache Options window. This window lets you specify the name, type, and location-on-disk of the merged fluid cache.
The Merge Fluid Cache Options window provides the same settings as the Create Fluid Cache Options window. See Fluid nCache > Create New Cache.