How to export all data (mesh and fields in .cas.h5 and .dat.h5) to ENCAS ?

[RomanLF]

Hello all,
I want to automatize dat.h5 and cas.h5 export to ENCAS format (see my code at the end of the description). My mesh is complex and
composed of many submeshes and fields such as pressure, wall shear stress and velocity among others. But when I use
the default ensight_gold export method, I only manage to export the first submesh of my mesh with
only a single velocity field. Could you please help me to export all fields ?

I also had problems to reload the exhaust system example, the link provided in the docs seem broken now.
But this code can be also run for the elbow example or any other example using dat.h5 and cas.h5 data.

By the way, I saw that in an other issue related to ASCII export, that you have to specify the zones and the
fields you want to export, in my case I want to export all the submeshes and fields, is there a way to automate
the choice of export zones ?

Thank you for your support,

Regards,
Roman

My code below :

# Trying to export all fields and submeshes from h5 files to ENCAS
"""
Roman Lopez Ferber :
Last attempt ensight conversion
"""

import ansys.fluent.core as pyfluent
from ansys.fluent.core import examples
from pathlib import Path

# Launch Fluent session
session = pyfluent.launch_fluent()

def main():
    data_path = Path(".")
    simu_path = data_path
    simu_path_cas = simu_path.joinpath("exhaust_system.cas.h5")  # by the way I cannot download anymore this files
    simu_path_dat = simu_path.joinpath("exhaust_system.dat.h5")

    ENCAS_NAME = "exhaust_system.encas"
    export_path = str(simu_path.joinpath(ENCAS_NAME))

    # Check if we run the ansys example
    if "exhaust_system" in str(simu_path_cas):
        # Check if we downloaded already the example and download it if not
        if (not simu_path_dat.exists()) or (not simu_path.cas.exists()):

            import_case = examples.download_file(file_name="exhaust_system.cas.h5", directory="pyfluent/exhaust_system") # this download does not work
            import_data = examples.download_file(file_name="exhaust_system.dat.h5", directory="pyfluent/exhaust_system")

    # Use TUI commands to read case and data files
    print("... Debug reading cas and dat file")
    session.tui.file.read_case(str(simu_path_cas))
    session.tui.file.read_data(str(simu_path_dat))

    # # Ensure all meshes and fields are included in the export
    # How to export all zones ? Do I have to retrieve the r_info list and pass it to the export ?
    session.tui.file.export.ensight_gold(export_path)

if __name__ == "main":
    main()

[RomanLF]

Edit :
The similar post I read with ASCII export : #3629

Fluent version R2024 R2

[RomanLF]

Edit : the exhaust_system download works now.

[RomanLF]

Edit
I managed my export with

session.settings.file.export.ensight_gold(
        file_name=str(export_path),
        cell_func_domain_export=field_names,
        binary_format=True,
        cellzones=zone_names,
        interior_zone_surfaces=[],
        cell_centered=True,
    )

It works on exhaust_system.h5 but I run in SIGSEGV at the middle of my export for large simulations (~2 to 5 GB). Do I need more RAM ?