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EM solver WIP

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jaseg 2023-10-04 16:02:46 +02:00
parent 4400dc361e
commit ba689e632e
1 changed files with 73 additions and 2 deletions
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75
coil_parasitics.py
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@ -89,7 +89,7 @@ def elmer_solver(cwd):
@click.command()
@click.option('-d', '--sim-dir', type=click.Path(dir_okay=True, file_okay=False, path_type=Path))
@click.argument('mesh_file', type=click.Path(dir_okay=False, path_type=Path))
def run_simulation(mesh_file, sim_dir):
def run_capacitance_simulation(mesh_file, sim_dir):
physical = dict(enumerate_mesh_bodies(mesh_file))
if sim_dir is not None:
sim_dir = Path(sim_dir)
@ -143,7 +143,78 @@ def run_simulation(mesh_file, sim_dir):
capacitance_matrix = np.loadtxt(tmpdir / 'capacitance.txt')
@click.command()
@click.option('-d', '--sim-dir', type=click.Path(dir_okay=True, file_okay=False, path_type=Path))
@click.argument('mesh_file', type=click.Path(dir_okay=False, path_type=Path))
def run_inductance_simulation(mesh_file, sim_dir):
physical = dict(enumerate_mesh_bodies(mesh_file))
if sim_dir is not None:
sim_dir = Path(sim_dir)
sim_dir.mkdir(exist_ok=True)
sim = elmer.load_simulation('3D_steady', 'coil_mag_sim.yml')
mesh_dir = '.'
mesh_fn = 'mesh'
sim.header['Mesh DB'] = f'"{mesh_dir}" "{mesh_fn}"'
sim.constants.update({
'Permittivity of Vacuum': str(constants.epsilon_0),
'Gravity(4)': f'0 -1 0 {constants.g}',
'Boltzmann Constant': str(constants.Boltzmann),
'Unit Charge': str(constants.elementary_charge)})
air = elmer.load_material('air', sim, 'coil_mag_materials.yml')
ro4003c = elmer.load_material('ro4003c', sim, 'coil_mag_materials.yml')
copper = elmer.load_material('copper', sim, 'coil_mag_materials.yml')
solver_current = elmer.load_solver('Static_Current_Conduction', sim, 'coil_mag_solvers.yml')
solver_magdyn = elmer.load_solver('Magneto_Dynamics', sim, 'coil_mag_solvers.yml')
solver_magdyn_calc = elmer.load_solver('Magneto_Dynamics_Calculations', sim, 'coil_mag_solvers.yml')
copper_eqn = elmer.Equation(sim, 'copperEqn', [solver_current, solver_magdyn, solver_magdyn_calc])
air_eqn = elmer.Equation(sim, 'airEqn', [solver_magdyn, solver_magdyn_calc])
bdy_trace = elmer.Body(sim, 'trace', [physical['trace'][1]])
bdy_trace.material = copper
bdy_trace.equation = copper_eqn
bdy_sub = elmer.Body(sim, 'substrate', [physical['substrate'][1]])
bdy_sub.material = ro4003c
bdy_sub.equation = air_eqn
bdy_ab = elmer.Body(sim, 'airbox', [physical['airbox'][1]])
bdy_ab.material = air
bdy_ab.equation = air_eqn
bdy_if_top = elmer.Body(sim, 'interface_top', [physical['interface_top'][1]])
bdy_if_top.material = copper
bdy_if_top.equation = copper_eqn
bdy_if_bottom = elmer.Body(sim, 'interface_bottom', [physical['interface_bottom'][1]])
bdy_if_bottom.material = copper
bdy_if_bottom.equation = copper_eqn
# boundaries
boundary_airbox = elmer.Boundary(sim, 'FarField', [physical['airbox_surface'][1]])
boundary_airbox.data['Electric Infinity BC'] = 'True'
boundary_vplus = elmer.Boundary(sim, 'Vplus', [physical['interface_top'][1]])
boundary_vplus.data['Potential'] = 1.0
boundary_vplus.data['Save Scalars'] = True
boundary_vminus = elmer.Boundary(sim, 'Vminus', [physical['interface_bottom'][1]])
boundary_vminus.data['Potential'] = 0.0
with tempfile.TemporaryDirectory() as tmpdir:
if sim_dir:
tmpdir = str(sim_dir)
sim.write_startinfo(tmpdir)
sim.write_sif(tmpdir)
# Convert mesh from gmsh to elemer formats. Also scale it from 1 unit = 1 mm to 1 unit = 1 m (SI units)
elmer_grid(mesh_file.name, 'mesh', cwd=tmpdir, scale=[1e-3, 1e-3, 1e-3])
elmer_solver(tmpdir)
if __name__ == '__main__':
run_simulation()
run_inductance_simulation()