# tell each processor how many particles it will hold
send = comm.scatter(send, root=0)
# allocate local particle container
pc = phd.ParticleContainer(send)
# import particles from root
fields = ['position-x', 'position-y', 'density', 'pressure', 'ids']
for field in fields:
comm.Scatterv([pc_root[field], (lengths, disp)], pc[field])
pc['process'][:] = rank
pc['tag'][:] = phd.ParticleTAGS.Real
pc['type'][:] = phd.ParticleTAGS.Undefined
domain = phd.DomainLimits(dim=2, xmin=0., xmax=1.) # spatial size of problem
load_bal = phd.LoadBalance(domain, comm, order=21) # tree load balance scheme
boundary = phd.BoundaryParallel(domain, # periodic boundary condition
boundary_type=phd.BoundaryType.Periodic,
load_bal, comm)
mesh = phd.Mesh(boundary) # tesselation algorithm
reconstruction = phd.PieceWiseConstant() # constant reconstruction
riemann = phd.HLLC(reconstruction, gamma=1.4, cfl=0.5) # riemann solver
integrator = phd.MovingMesh(pc, mesh, riemann, regularize=1) # integrator
solver = phd.SolverParallel(integrator, # simulation driver
cfl=0.5, tf=2.5, pfreq=25,
relax_num_iterations=0,
output_relax=False,
fname='kh_2d_cartesian')
solver.solve()
pc['velocity-x'][:] = 0.0
pc['velocity-y'][:] = 0.0
pc['tag'][:] = phd.ParticleTAGS.Real
pc['type'][:] = phd.ParticleTAGS.Undefined
return pc
# simulation driver
sim = phd.Simulation(cfl=0.5,
tf=2.5,
pfreq=25,
relax_num_iterations=0,
output_relax=False,
fname='implosion')
sim.add_component(
create_particles(1.4)) # create inital state of the simulation
sim.add_component(phd.DomainLimits(dim=2, xmin=0.,
xmax=1.)) # spatial size of problem
sim.add_component(phd.Boundary(boundary_type=phd.BoundaryType.Reflective)
) # reflective boundary condition
sim.add_component(phd.Mesh()) # tesselation algorithm
sim.add_component(phd.PieceWiseLinear()) # Linear reconstruction
#sim.add_component(phd.PieceWiseConstant()) # Linear reconstruction
sim.add_component(phd.HLLC(gamma=1.4)) # riemann solver
sim.add_component(phd.MovingMesh(regularize=1)) # Integrator
# run the simulation
sim.solve()
r = 0.1
cells = ((pc['position-x']-.5)**2 + (pc['position-y']-.5)**2) <= r**2
pc['pressure'][cells] = 1.0/(np.pi*r**2)*(gamma-1)
# zero out the velocities and set particle type
pc['velocity-x'][:] = 0.0
pc['velocity-y'][:] = 0.0
pc['tag'][:] = phd.ParticleTAGS.Real
pc['type'][:] = phd.ParticleTAGS.Undefined
return pc
# simulation driver
sim = phd.Simulation(
cfl=0.5, tf=0.1, pfreq=1,
relax_num_iterations=10,
output_relax=False,
fname='sedov_2d_uniform')
sim.add_particles(create_particles(1.4)) # create inital state of the simulation
sim.add_domain(phd.DomainLimits(dim=2, xmin=0., xmax=1.)) # spatial size of problem
sim.add_boundary(phd.Boundary(boundary_type=phd.BoundaryType.Reflective)) # reflective boundary condition
sim.add_mesh(phd.Mesh()) # tesselation algorithm
sim.add_reconstruction(phd.PieceWiseLinear(limiter=1)) # Linear reconstruction
#sim.add_reconstruction(phd.PieceWiseConstant(limiter=1)) # Linear reconstruction
sim.add_riemann(phd.HLLC(gamma=1.4, boost=0)) # riemann solver
sim.add_integrator(phd.MovingMesh(regularize=1)) # Integrator
# run the simulation
sim.solve()