Cylinder flow

This example shows how to create a simple ICFD cylinder flow input deck. The executable file for LS-DYNA is ls-dyna_smp_d_R13.1_138-g8429c8a10f_winx64_ifort190.exe.

'/server/output'

import os
import sys

from ansys.dyna.core.pre import examples, launch_dynapre
from ansys.dyna.core.pre.dynaicfd import (
    ICFDDOF,
    Curve,
    DynaICFD,
    ICFDAnalysis,
    ICFDPart,
    ICFDVolumePart,
    MatICFD,
    MeshedVolume,
)
from ansys.dyna.core.pre.misc import check_valid_ip


hostname = "localhost"
if len(sys.argv) > 1 and check_valid_ip(sys.argv[1]):
    hostname = sys.argv[1]

icfd_solution = launch_dynapre(ip=hostname)
# Import the initial mesh data(nodes and elements)
fns = []
path = examples.cylinder_flow + os.sep
fns.append(path + "cylinder_flow.k")
icfd_solution.open_files(fns)
# Set total time of simulation
icfd_solution.set_termination(termination_time=100)

icfd = DynaICFD()
icfd_solution.add(icfd)

icfdanalysis = ICFDAnalysis()
icfdanalysis.set_timestep()
icfd.add(icfdanalysis)

# define model
mat = MatICFD(flow_density=1.0, dynamic_viscosity=0.005)

part_inflow = ICFDPart(1)
part_inflow.set_material(mat)
part_inflow.set_prescribed_velocity(dof=ICFDDOF.X, motion=Curve(x=[0, 10000], y=[1, 1]))
part_inflow.set_prescribed_velocity(dof=ICFDDOF.Y, motion=Curve(x=[0, 10000], y=[0, 0]))
icfd.parts.add(part_inflow)

part_outflow = ICFDPart(2)
part_outflow.set_material(mat)
part_outflow.set_prescribed_pressure(pressure=Curve(x=[0, 10000], y=[0, 0]))
icfd.parts.add(part_outflow)

part_symmetric = ICFDPart(3)
part_symmetric.set_material(mat)
part_symmetric.set_free_slip()
icfd.parts.add(part_symmetric)

part_wall = ICFDPart(4)
part_wall.set_material(mat)
part_wall.set_non_slip()
part_wall.compute_drag_force()
part_wall.set_boundary_layer(number=3)
icfd.parts.add(part_wall)

partvol = ICFDVolumePart(surfaces=[1, 2, 3, 4])
partvol.set_material(mat)
icfd.parts.add(partvol)
# define the volume space that will be meshed,The boundaries
# of the volume are the surfaces "spids"
meshvol = MeshedVolume(surfaces=[1, 2, 3, 4])
icfd.add(meshvol)

icfd_solution.create_database_binary(dt=1)
icfd_solution.save_file()