Free convection flow

This example shows a simple ICFD forced-convection input deck with a coarse mesh. 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 launch_dynapre
from ansys.dyna.core.pre.dynaicfd import (
    DynaICFD,
    MatICFD,
    ICFDPart,
    Curve,
    ICFDVolumePart,
    MeshedVolume,
    ICFDAnalysis,
    Gravity,
    GravityOption

)
from ansys.dyna.core.pre import examples
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]

solution = launch_dynapre(ip = hostname)
# Import the initial mesh data(nodes and elements)
fns = []
path = examples.free_convection_flow + os.sep
fns.append(path + "free_convection_flow.k")
solution.open_files(fns)
solution.set_termination(termination_time=30)
icfd = DynaICFD()
solution.add(icfd)

icfdanalysis = ICFDAnalysis()
icfdanalysis.set_timestep(0.01)
icfd.add(icfdanalysis)

# define model
mat = MatICFD(flow_density=37.799999, dynamic_viscosity=1,heat_capacity = 0.7,thermal_conductivity=1.0,thermal_expansion_coefficient=1)

part_inflow = ICFDPart(1)
part_inflow.set_material(mat)
part_inflow.set_non_slip()
part_inflow.set_prescribed_temperature(temperature=Curve(x=[0, 10000], y=[1, 1]))
icfd.parts.add(part_inflow)

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

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

part_wall = ICFDPart(4)
part_wall.set_material(mat)
part_wall.set_non_slip()
part_wall.compute_temperature()
icfd.parts.add(part_wall)

icfd.set_initial()

g = Gravity(dir=GravityOption.DIR_Y, load=Curve(x=[0, 10000], y=[1, 1]))
icfd.add(g)

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)

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