Is your feature request related to a problem? Please describe.
3D output files are currently not merged in the y-direction, leading to fragmentation and inefficiency in postprocessing.
Describe the solution you'd like
Implement logic to merge 3D output files along the y-direction, update relevant IO logic, and add tests for correctness.
Describe alternatives you've considered
Manual postprocessing to merge files, but automating this within the IO routines is preferred.
Additional context
Related to parent issue #242.
Is your feature request related to a problem? Please describe.
3D output files are currently not merged in the y-direction, leading to fragmentation and inefficiency in postprocessing.
Describe the solution you'd like
Implement logic to merge 3D output files along the y-direction, update relevant IO logic, and add tests for correctness.
Describe alternatives you've considered
Manual postprocessing to merge files, but automating this within the IO routines is preferred.
Additional context
Related to parent issue #242.