Ansys Learning Forum Forums Discuss Simulation Fluids Understanding Cell ID Numbering in ANSYS Fluent Reply To: Understanding Cell ID Numbering in ANSYS Fluent

Rob
Forum Moderator

It changes because with the repartition you will get "partition" cells that are used to help with the data transfer. Simple explanation is we add a layer or few of cells from each partition to the adjacent ones to assist in data mapping and gradient calculation. Those also have an ID for the solver to work with. 

There's also the fact that cell data is stored in RAM so it may or may not always be stored in the same order. It's logical, but that doesn't mean it's repeatable!Â