def METHOD_NAME(dry_run=False):
    """Generate parameter and expression files.
    Args:
        dry_run (bool): If dry run don't generate files
    Returns:
        WriteParameters
    """
    main_param_file = os.path.join(this_file_dir(), "h2o.json")
    we = WriteParameters(parameters=main_param_file)
    we.add(
        {
            "viscosity": viscosity_rule,
            "thermal_conductivity": thermal_conductivity_rule,
        }
    )
    we.write(dry_run=dry_run)
    return we