How to calculate Elemental Mass using DPF?

Options
Ayush Kumar
Ayush Kumar Member, Moderator, Employee Posts: 409
First Anniversary Ansys Employee Solution Developer Community of Practice Member First Answer

How to calculate Elemental Mass using DPF?

Tagged:

Comments

  • Ayush Kumar
    Ayush Kumar Member, Moderator, Employee Posts: 409
    First Anniversary Ansys Employee Solution Developer Community of Practice Member First Answer
    Options

    There is dedicated operator dpf.operators.result.elemental_mass() but in case there is an issue calculating via the operator; the following can be used:

    from ansys.dpf import core as dpf
    
    rst = r"\Path\to\file.rst"
    
    ds = dpf.DataSources(rst)
    
    model = dpf.Model(rst)
    dpf_mesh = model.metadata.meshed_region
    
    # List to store elemental densities
    all_mats = []
    
    mats = dpf_mesh.property_field("mat")
    mat_prop = model.operator("mapdl_material_properties")
    mat_prop.inputs.materials.connect(mats)
    
    mat_prop.inputs.properties_name.connect("DENS")
    mat_field = mat_prop.outputs.properties_value.get_data()[0]
    for eid in dpf_mesh.elements.scoping.ids:
        mat_id = mats.get_entity_data_by_id(eid)
        density = mat_field.get_entity_data_by_id(mat_id[0])
        all_mats.append(density)
    
    # Create Density Field
    density = dpf.fields_factory.create_scalar_field(num_entities=dpf_mesh.elements.n_elements)
    density.location = dpf.locations.elemental
    density.scoping.ids = dpf_mesh.elements.scoping.ids
    density.data = all_mats
    
    # Element volume
    el_vol = dpf.operators.geo.elements_volume(mesh=dpf_mesh)
    
    # Calculate elemental mass (density * volume)
    elemental_mass = dpf.operators.math.generalized_inner_product(fieldA=el_vol, fieldB=density)