What is the numbering order?

what is the numbering order when outputing results in paraview?

It is the numbering orders correct?and what about the Z axis?

The order in correct, and it will increment in the z-direction (after y and x increment). Please note that the ghost layers are not shown in the vtu files, so it won’t start at IJK=1, and you will see some discontinuity in the numbering. IJK cell indices can be stored in the vtu files from Output> VTK pane. Select a region (must be cell data type) and go to the “Other” tab in the “Select cell data to write”, and check “Cell index”

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