src/Mod/Fem/femsolver/calculix/write_constraint_heatflux.py

# ***************************************************************************
# *   Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org>              *
# *                                                                         *
# *   This file is part of the FreeCAD CAx development system.              *
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__title__ = "FreeCAD FEM calculix constraint heatflux"
__author__ = "Bernd Hahnebach"
__url__ = "https://www.freecad.org"


def get_analysis_types():
    return ["thermomech"]


def get_sets_name():
    return "constraints_heatflux_element_face_heatflux"


def get_before_write_meshdata_constraint():
    return ""


def get_after_write_meshdata_constraint():
    return ""


def write_meshdata_constraint(f, femobj, heatflux_obj, ccxwriter):

    # floats read from ccx should use {:.13G}, see comment in writer module

    if heatflux_obj.ConstraintType == "Convection":
        heatflux_key_word = "FILM"
        heatflux_facetype = "F"
        heatflux_facesubtype = ""
        heatflux_values = "{:.13G},{:.13G}".format(
            heatflux_obj.AmbientTemp.getValueAs("K").Value,
            heatflux_obj.FilmCoef.getValueAs("t/s^3/K").Value,
        )

    elif heatflux_obj.ConstraintType == "Radiation":
        heatflux_facetype = "R"
        if heatflux_obj.CavityRadiation:
            heatflux_key_word = f"RADIATE, CAVITY={heatflux_obj.CavityName}"
            heatflux_facesubtype = "CR"
        else:
            heatflux_key_word = "RADIATE"
            heatflux_facesubtype = ""
        heatflux_values = "{:.13G},{:.13G}".format(
            heatflux_obj.AmbientTemp.getValueAs("K").Value, heatflux_obj.Emissivity
        )

    elif heatflux_obj.ConstraintType == "DFlux":
        heatflux_key_word = "DFLUX"
        heatflux_facetype = "S"
        heatflux_facesubtype = ""
        heatflux_values = "{:.13G}".format(heatflux_obj.DFlux.getValueAs("t/s^3").Value)

    else:
        return

    if heatflux_obj.EnableAmplitude:
        heatflux_amplitude = f", AMPLITUDE={heatflux_obj.Name}"
    else:
        heatflux_amplitude = ""

    f.write(f"*{heatflux_key_word}{heatflux_amplitude}\n")
    for feat, surf, is_sub_el in femobj["HeatFluxFaces"]:
        f.write("** {0.Name}.{1[0]}\n".format(*feat))
        for face, fno in surf:
            f.write(f"{face},{heatflux_facetype}{fno}{heatflux_facesubtype},{heatflux_values}\n")