Get a mesh from a result file

MAPDL LSDYNA Fluent CFX

This tutorial explains how to extract a mesh from a result file.

The mesh object in DPF is a MeshedRegion. You can obtain a MeshedRegion by creating your own from scratch or by getting it from a result file.

You can get the mesh from a result file using two approaches:

• Using the Model

• Using the mesh_provider operator

Note

A Model extracts a large amount of information by default (results, mesh and analysis data). If using this helper takes a long time, consider using a DataSources object and instantiating operators directly with it.

Import the necessary modules

from ansys.dpf import core as dpf
from ansys.dpf.core import examples, operators as ops

MAPDL — import and get mesh

Define result file path and create a DataSources object.

result_file_path_1 = examples.find_static_rst()
ds_1 = dpf.DataSources(result_path=result_file_path_1)

Get the mesh using the Model.

model_1 = dpf.Model(data_sources=ds_1)
meshed_region_11 = model_1.metadata.meshed_region
print(meshed_region_11)

DPF  Meshed Region:
  81 nodes
  8 elements
  Unit: m
  With solid (3D) elements

Get the mesh using the mesh_provider operator.

meshed_region_12 = ops.mesh.mesh_provider(data_sources=ds_1).eval()
print(meshed_region_12)

DPF  Meshed Region:
  81 nodes
  8 elements
  Unit: m
  With solid (3D) elements

LS-DYNA — import and get mesh

The d3plot file requires an actunits file to get correct units when the simulation was run through Mechanical.

result_file_path_2 = examples.download_d3plot_beam()
ds_2 = dpf.DataSources()
ds_2.set_result_file_path(filepath=result_file_path_2[0], key="d3plot")
ds_2.add_file_path(filepath=result_file_path_2[3], key="actunits")

Get the mesh using the Model.

model_2 = dpf.Model(data_sources=ds_2)
meshed_region_21 = model_2.metadata.meshed_region
print(meshed_region_21)

DPF  Meshed Region:
  1940 nodes
  2056 elements
  Unit: mm
  With solid (3D) elements, beam (1D) elements

Get the mesh using the mesh_provider operator.

meshed_region_22 = ops.mesh.mesh_provider(data_sources=ds_2).eval()
print(meshed_region_22)

DPF  Meshed Region:
  1940 nodes
  2056 elements
  Unit: mm
  With solid (3D) elements, beam (1D) elements

Fluent — import and get mesh

result_file_path_3 = examples.download_fluent_axial_comp()["flprj"]
ds_3 = dpf.DataSources(result_path=result_file_path_3)

Get the mesh using the Model.

model_3 = dpf.Model(data_sources=ds_3)
meshed_region_31 = model_3.metadata.meshed_region
print(meshed_region_31)

DPF  Meshed Region:
  16660 nodes
  13856 elements
  44242 faces
  Unit: m
  With solid (3D) elements

Get the mesh using the mesh_provider operator.

meshed_region_32 = ops.mesh.mesh_provider(data_sources=ds_3).eval()
print(meshed_region_32)

DPF  Meshed Region:
  16660 nodes
  13856 elements
  44242 faces
  Unit: m
  With solid (3D) elements

CFX — import and get mesh

result_file_path_4 = examples.download_cfx_mixing_elbow()
ds_4 = dpf.DataSources(result_path=result_file_path_4)

Get the mesh using the Model.

model_4 = dpf.Model(data_sources=ds_4)
meshed_region_41 = model_4.metadata.meshed_region
print(meshed_region_41)

DPF  Meshed Region:
  6219 nodes
  15695 elements
  Unit: m
  With solid (3D) elements

Get the mesh using the mesh_provider operator.

meshed_region_42 = ops.mesh.mesh_provider(data_sources=ds_4).eval()
print(meshed_region_42)

DPF  Meshed Region:
  6219 nodes
  15695 elements
  Unit: m
  With solid (3D) elements