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import warp
from warp import top
from warp import w3d
from ._libwarpx import libwarpx
class TimeStepper(object):
def step(self, nsteps=1):
for i in range(nsteps):
self.onestep()
def onestep(self):
self.cur_time = libwarpx.warpx_gett_new(0)
self.istep = libwarpx.warpx_getistep(0)
#if mpi.rank == 0:
print "\nSTEP %d starts ..."%(self.istep + 1)
#if (ParallelDescriptor::NProcs() > 1)
# if (okToRegrid(step)) RegridBaseLevel();
libwarpx.warpx_ComputeDt()
dt = libwarpx.warpx_getdt(0)
# --- Advance level 0 by dt
lev = 0
# --- At the beginning, we have B^{n-1/2} and E^{n}.
# --- Particles have p^{n-1/2} and x^{n}.
libwarpx.warpx_EvolveB(lev, 0.5*dt) # We now B^{n}
libwarpx.warpx_FillBoundaryE(lev, False)
libwarpx.warpx_FillBoundaryB(lev, False)
# --- Evolve particles to p^{n+1/2} and x^{n+1}
# --- Depose current, j^{n+1/2}
libwarpx.warpx_PushParticlesandDepose(lev, self.cur_time)
libwarpx.mypc_Redistribute() # Redistribute particles
libwarpx.warpx_EvolveB(lev, 0.5*dt) # We now B^{n+1/2}
libwarpx.warpx_FillBoundaryB(lev, True)
libwarpx.warpx_EvolveE(lev, dt) # We now have E^{n+1}
self.istep += 1
self.cur_time += dt
libwarpx.warpx_MoveWindow();
#if mpi.rank == 0:
print "STEP %d ends. TIME = %e DT = %e"%(self.istep, self.cur_time, dt)
# --- Sync up time
for i in range(libwarpx.warpx_finestLevel()+1):
libwarpx.warpx_sett_new(i, self.cur_time)
libwarpx.warpx_setistep(i, self.istep)
max_time_reached = ((self.cur_time >= libwarpx.warpx_stopTime() - 1.e-6*dt) or (self.istep >= libwarpx.warpx_maxStep()))
if libwarpx.warpx_plotInt() > 0 and (self.istep+1)%libwarpx.warpx_plotInt() == 0 or max_time_reached:
libwarpx.warpx_WritePlotFile()
if libwarpx.warpx_checkInt() > 0 and (self.istep+1)%libwarpx.warpx_plotInt() == 0 or max_time_reached:
libwarpx.warpx_WriteCheckPointFile()
# --- This is not used
class TimeStepperFromPICSAR(object):
def __init__(self, package=None, solver=None, l_debug=False):
self.package = package
self.solver = solver
self.l_debug = l_debug
def setpackagestepnumber(self, it):
if self.package is not None:
self.package.setstepnumber(it)
def step(self, n=1, freq_print=10, lallspecl=0):
"""
This function performs a range of Particle-In-Cell iterations
Inputs:
- n: number of iterations
- freq_print: print frequency
"""
if (self.l_debug): print("Call step")
for i in range(n):
if(me == 0):
if top.it%freq_print == 0:
print 'it = %g time = %g'%(top.it, top.time)
l_first = (lallspecl or (i == 0))
l_last = (lallspecl or (i == n-1))
self.onestep(l_first, l_last)
if (self.l_debug): print("End step")
def onestep(self, l_first, l_last):
"""
Perform a single particle-in-cell step
"""
if (self.l_debug): print("Call onestep")
# --- Iteration number
self.setpackagestepnumber(top.it)
# --- call beforestep functions
if (self.l_debug): print("Call beforestep functions")
warp.callbeforestepfuncs.callfuncsinlist()
# --- gather fields from grid to particles
if (self.l_debug): print("Call Field gathering and particle push")
# --- push
if l_first:
if self.package is None:
# --- Standard Warp advance
for specie in warp.listofallspecies:
for pg in specie.flatten(specie.pgroups):
for js in range(pg.ns):
self.push_velocity_second_part(js, pg)
self.push_positions(js, pg)
warp.particleboundaries3d(pg, -1, False)
else:
# --- Particle pusher
if (self.l_debug): print("Call package particle push")
pxr.pxrpush_particles_part2()
# --- Particle boundary consitions
if (self.l_debug): print("Call package particle boundary conditions")
pxr.particle_bcs()
if (self.l_debug): print("Call aliasparticlearrays()")
self.aliasparticlearrays()
else:
if self.package is None:
# --- Standard Warp advance
for specie in warp.listofallspecies:
for pg in specie.flatten(specie.pgroups):
for js in range(pg.ns):
self.push_velocity_full(js, pg)
self.push_positions(js, pg)
warp.particleboundaries3d(pg, -1, False)
else:
# --- Particle pusher
if (self.l_debug): print("Call package particle pusher")
pxr.field_gathering_plus_particle_pusher()
# --- Particle boundary conditions
if (self.l_debug): print("Call package particle boundary conditions")
pxr.particle_bcs()
self.aliasparticlearrays()
# --- Particle sorting
if (self.l_debug): print("Call Particle Sorting")
if self.package is not None:
# --- This should be a function installed before load rho
pxr.particle_sorting_sub()
# --- call beforeloadrho functions
if (self.l_debug): print("Call beforeloadrho functions")
warp.beforeloadrho.callfuncsinlist()
pgroups = []
for specie in warp.listofallspecies:
pgroups += specie.flatten(specie.pgroups)
self.pgroups = pgroups
# --- Call user-defined injection routines
if (self.l_debug): print("Call user-defined injection routines")
warp.userinjection.callfuncsinlist()
xgriddiff = w3d.xmmin - pxr.xmin
ygriddiff = w3d.ymmin - pxr.ymin
zgriddiff = w3d.zmmin - pxr.zmin
if (xgriddiff != 0 or ygriddiff != 0 or zgriddiff != 0):
pxr.pxr_move_sim_boundaries(xgriddiff, ygriddiff, zgriddiff)
if (self.l_debug): print("Call loadrho")
self.solver.loadrho(pgroups = pgroups)
if (self.l_debug): print("Call loadj")
self.solver.loadj(pgroups = pgroups)
if (self.l_debug): print("Call dosolve")
self.solver.dosolve()
if self.package is None:
for specie in warp.listofallspecies:
for pg in specie.flatten(specie.pgroups):
for js in range(pg.ns):
self.fetcheb(js, pg)
if l_last:
self.push_velocity_first_part(js, pg)
else:
if l_last:
if (self.l_debug): print("Call package push particles 1")
pxr.pxrpush_particles_part1()
# --- update time, time counter
top.time += top.dt
if top.it%top.nhist == 0:
# zmmnt()
minidiag(top.it, top.time, top.lspecial)
top.it += 1
# --- Load balance function should be installed after step
# --- call afterstep functions
if (self.l_debug): print("Call callafterstepfuncs.callfuncsinlist()")
warp.callafterstepfuncs.callfuncsinlist()
# --- The following methods use the standard Warp routines
def fetcheb(self, js, pg=None):
if self.l_verbose:print me, 'enter fetcheb'
if pg is None:
pg = top.pgroup
np = pg.nps[js]
if np == 0: return
il = pg.ins[js] - 1
iu = il + pg.nps[js]
w3d.pgroupfsapi = pg
w3d.ipminfsapi = pg.ins[js]
w3d.npfsapi = pg.nps[js]
pg.ex[il:iu] = 0.
pg.ey[il:iu] = 0.
pg.ez[il:iu] = 0.
pg.bx[il:iu] = 0.
pg.by[il:iu] = 0.
pg.bz[il:iu] = 0.
self.fetche()
self.fetchb()
w3d.pgroupfsapi = None
def push_velocity_full(self, js, pg=None):
if self.l_verbose:print me, 'enter push_velocity_full'
if pg is None:
pg = top.pgroup
np = pg.nps[js]
if np == 0: return
il = pg.ins[js] - 1
iu = il + pg.nps[js]
if pg.lebcancel_pusher:
warp.ebcancelpush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu], pg.gaminv[il:iu],
pg.ex[il:iu], pg.ey[il:iu], pg.ez[il:iu],
pg.bx[il:iu], pg.by[il:iu], pg.bz[il:iu],
pg.sq[js], pg.sm[js], top.dt, 0)
else:
# --- push velocity from electric field (half step)
warp.epush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu],
pg.ex[il:iu], pg.ey[il:iu], pg.ez[il:iu],
pg.sq[js], pg.sm[js], 0.5*top.dt)
# --- update gamma
self.set_gamma(js, pg)
# --- push velocity from magnetic field
warp.bpush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu], pg.gaminv[il:iu],
pg.bx[il:iu], pg.by[il:iu], pg.bz[il:iu],
pg.sq[js], pg.sm[js], top.dt, top.ibpush)
# --- push velocity from electric field (half step)
warp.epush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu],
pg.ex[il:iu], pg.ey[il:iu], pg.ez[il:iu],
pg.sq[js], pg.sm[js], 0.5*top.dt)
# --- update gamma
self.set_gamma(js, pg)
if self.l_verbose:print me, 'exit push_velocity_first_part'
def push_velocity_first_part(self, js, pg=None):
if self.l_verbose:print me, 'enter push_velocity_first_part'
if pg is None:
pg = top.pgroup
np = pg.nps[js]
if np == 0: return
il = pg.ins[js] - 1
iu = il + pg.nps[js]
if pg.lebcancel_pusher:
warp.ebcancelpush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu], pg.gaminv[il:iu],
pg.ex[il:iu], pg.ey[il:iu], pg.ez[il:iu],
pg.bx[il:iu], pg.by[il:iu], pg.bz[il:iu],
pg.sq[js], pg.sm[js], top.dt, 1)
else:
# --- push velocity from electric field (half step)
warp.epush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu],
pg.ex[il:iu], pg.ey[il:iu], pg.ez[il:iu],
pg.sq[js], pg.sm[js], 0.5*top.dt)
# --- update gamma
self.set_gamma(js,pg)
# --- push velocity from magnetic field
warp.bpush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu], pg.gaminv[il:iu],
pg.bx[il:iu], pg.by[il:iu], pg.bz[il:iu],
pg.sq[js], pg.sm[js], 0.5*top.dt, top.ibpush)
if self.l_verbose:print me, 'exit push_velocity_first_part'
def push_velocity_second_part(self, js, pg=None):
if self.l_verbose:print me, 'enter push_velocity_second_part'
if pg is None:
pg = top.pgroup
np = pg.nps[js]
if np == 0: return
il = pg.ins[js] - 1
iu = il + pg.nps[js]
if pg.lebcancel_pusher:
warp.ebcancelpush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu], pg.gaminv[il:iu],
pg.ex[il:iu], pg.ey[il:iu], pg.ez[il:iu],
pg.bx[il:iu], pg.by[il:iu], pg.bz[il:iu],
pg.sq[js], pg.sm[js], top.dt, 2)
else:
# --- push velocity from magnetic field
warp.bpush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu], pg.gaminv[il:iu],
pg.bx[il:iu], pg.by[il:iu], pg.bz[il:iu],
pg.sq[js], pg.sm[js], 0.5*top.dt, top.ibpush)
# --- push velocity from electric field (half step)
warp.epush3d(np, pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu],
pg.ex[il:iu], pg.ey[il:iu], pg.ez[il:iu],
pg.sq[js], pg.sm[js], 0.5*top.dt)
# --- update gamma
self.set_gamma(js, pg)
if self.l_verbose:print me, 'exit push_velocity_second_part'
def set_gamma(self, js, pg=None):
if self.l_verbose:print me, 'enter set_gamma'
if pg is None:
pg = top.pgroup
np = pg.nps[js]
if np == 0: return
il = pg.ins[js] - 1
iu = il + pg.nps[js]
# --- update gamma
warp.gammaadv(np, pg.gaminv[il:iu], pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu], top.gamadv, top.lrelativ)
if self.l_verbose:print me, 'exit set_gamma'
def push_positions(self, js, pg=None):
if self.l_verbose:print me, 'enter push_positions'
if pg is None:
pg = top.pgroup
np = pg.nps[js]
if np == 0: return
il = pg.ins[js] - 1
iu = il + pg.nps[js]
warp.xpush3d(np, pg.xp[il:iu], pg.yp[il:iu], pg.zp[il:iu],
pg.uxp[il:iu], pg.uyp[il:iu], pg.uzp[il:iu],
pg.gaminv[il:iu], top.dt)
if self.l_verbose:print me, 'exit push_positions'
|
