<div dir="auto">Thanks Zach.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 27, 2020, 11:50 PM Zach Etienne <<a href="mailto:zachetie@gmail.com">zachetie@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Bilal,<div><br></div><div>You are under-resolving the black holes. For stability you will need gridspacing of at least ~1/16 around each black hole (M/16, where M=1 for this binary), and here your gridspacing is 1.25. I would suggest starting by trying to reproduce the binary black hole gallery example:</div><div><a href="https://einsteintoolkit.org/gallery/bbh/index.html" target="_blank" rel="noreferrer">https://einsteintoolkit.org/gallery/bbh/index.html</a><br></div><div><br></div><div>and adding small adjustments until you get it working according to your needs.</div><div><br clear="all"><div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:12.8px">-Zach</div><div style="font-size:12.8px"><br></div><span style="font-size:12.8px">* * *</span><br style="font-size:12.8px"><span style="font-size:12.8px">Prof. Zachariah Etienne</span></div><div dir="ltr">Physics & Astronomy Dept.<br style="font-size:12.8px"><div style="font-size:12.8px">West Virginia University</div><div><a href="http://astro.phys.wvu.edu/zetienne/" target="_blank" rel="noreferrer">http://astro.phys.wvu.edu/zetienne/</a></div><div><a href="http://blackholesathome.net/" target="_blank" rel="noreferrer">http://blackholesathome.net</a><a href="https://blackholesathome.net" style="font-size:12.8px" target="_blank" rel="noreferrer"><br></a><br></div></div></div></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 27, 2020 at 2:38 PM Bilal Hameed <<a href="mailto:bilalhameedawan962@gmail.com" target="_blank" rel="noreferrer">bilalhameedawan962@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Dear Users.</p>
<p>I am runing --parfile
repos/ctthorns/CT_MultiLevel/par/twopunctures.par.</p>
<p>######################################<br>
# Flesh parameters<br>
######################################<br>
<br>
Cactus::cctk_run_title = "Solving the Hamiltonian constraint for
two punctures with CT_MultiLevel (multigrid setup, FMG) and with
TwoPunctures"<br>
<br>
Cactus::cctk_full_warnings = yes<br>
Cactus::highlight_warning_messages = no<br>
Cactus::cctk_timer_output = "off"<br>
<br>
Cactus::terminate = "any"<br>
Cactus::cctk_initial_time = 0<br>
Cactus::cctk_final_time = 30<br>
Cactus::cctk_itlast = 200<br>
<br>
<br>
#############################################################################################<br>
ActiveThorns = "Boundary CartGrid3D CoordBase Slab SymBase"<br>
#############################################################################################<br>
<br>
CoordBase::domainsize = "minmax"<br>
<br>
CoordBase::xmin = -40.00<br>
CoordBase::ymin = -40.00<br>
CoordBase::zmin = -40.00<br>
CoordBase::xmax = +40.00<br>
CoordBase::ymax = +40.00<br>
CoordBase::zmax = +40.00<br>
CoordBase::dx = 10<br>
CoordBase::dy = 10<br>
CoordBase::dz = 10<br>
<br>
CoordBase::boundary_size_x_lower = 3<br>
CoordBase::boundary_size_y_lower = 3<br>
CoordBase::boundary_size_z_lower = 3<br>
CoordBase::boundary_size_x_upper = 3<br>
CoordBase::boundary_size_y_upper = 3<br>
CoordBase::boundary_size_z_upper = 3<br>
<br>
CoordBase::boundary_shiftout_x_lower = 1<br>
CoordBase::boundary_shiftout_y_lower = 1<br>
CoordBase::boundary_shiftout_z_lower = 1<br>
CoordBase::boundary_shiftout_x_upper = 1<br>
CoordBase::boundary_shiftout_y_upper = 1<br>
CoordBase::boundary_shiftout_z_upper = 1<br>
<br>
CartGrid3D::type = "coordbase"<br>
<br>
##################################################################################<br>
ActiveThorns = "IOUtil Carpet CarpetLib CarpetInterp LoopControl
CarpetReduce CarpetSlab"<br>
##################################################################################<br>
<br>
Carpet::adaptive_stepsize = "no"<br>
<br>
Carpet::schedule_barriers = no<br>
CarpetLib::output_bboxes = no<br>
Carpet::init_fill_timelevels = "yes"<br>
<br>
Carpet::domain_from_coordbase = yes<br>
Carpet::max_refinement_levels = 5<br>
<br>
driver::ghost_size = 3<br>
Carpet::use_buffer_zones = yes<br>
<br>
Carpet::prolongation_order_space = 5<br>
Carpet::prolongation_order_time = 2<br>
<br>
Carpet::convergence_level = 0<br>
<br>
Carpet::poison_new_timelevels = yes<br>
CarpetLib::poison_new_memory = yes<br>
<br>
Carpet::output_timers_every = 0<br>
CarpetLib::print_timestats_every = 0<br>
CarpetLib::print_memstats_every = 0<br>
<br>
CarpetLib::max_allowed_memory_MB = 12288<br>
<br>
##################################################################<br>
ActiveThorns = "CarpetRegrid2"<br>
##################################################################<br>
<br>
Carpet::grid_structure_filename = "grid_structure.asc"<br>
Carpet::grid_coordinates_filename = "grid_coordinates.asc"<br>
<br>
CarpetRegrid2::num_centres = 1<br>
CarpetRegrid2::num_levels_1 = 4<br>
CarpetRegrid2::radius_1[1] = 50<br>
CarpetRegrid2::radius_1[2] = 25<br>
CarpetRegrid2::radius_1[3] = 12<br>
#CarpetRegrid2::radius_1[4] = 50<br>
#CarpetRegrid2::radius_1[5] = 25<br>
#CarpetRegrid2::radius_1[6] = 12<br>
#CarpetRegrid2::radius_1[7] = 6<br>
<br>
#################################<br>
ActiveThorns = "AEILocalInterp"<br>
ActiveThorns = "BLAS LAPACK"<br>
ActiveThorns = "Fortran"<br>
ActiveThorns = "GenericFD"<br>
ActiveThorns = "HDF5"<br>
ActiveThorns = "InitBase"<br>
ActiveThorns = "LocalInterp"<br>
#################################<br>
<br>
#################################<br>
ActiveThorns = "MoL Time"<br>
#################################<br>
<br>
MoL::ODE_Method = "RK4"<br>
MoL::MoL_Intermediate_Steps = 4<br>
MoL::MoL_Num_Scratch_Levels = 1<br>
<br>
Time::dtfac = 0.2<br>
<br>
###################################################################################################<br>
ActiveThorns = "CT_MultiLevel CT_Analytic ADMBase ML_BSSN
ML_BSSN_Helper CoordGauge StaticConformal TmunuBase ADMCoupling
ADMMacros TwoPunctures"<br>
###################################################################################################<br>
<br>
ADMBase::metric_timelevels = 3<br>
ADMBase::lapse_timelevels = 3<br>
ADMBase::shift_timelevels = 3<br>
<br>
ADMBase::metric_type = "physical"<br>
<br>
ADMBase::initial_data = "twopunctures"<br>
ADMBase::initial_lapse = "twopunctures-averaged"<br>
ADMBase::initial_shift = "zero"<br>
ADMBase::initial_dtlapse = "zero"<br>
ADMBase::initial_dtshift = "zero"<br>
<br>
ADMBase::evolution_method = "ML_BSSN"<br>
ADMBase::lapse_evolution_method = "ML_BSSN"<br>
ADMBase::shift_evolution_method = "ML_BSSN"<br>
ADMBase::dtlapse_evolution_method = "ML_BSSN"<br>
ADMBase::dtshift_evolution_method = "ML_BSSN"<br>
<br>
ADMBase::admbase_boundary_condition = "none"<br>
<br>
TwoPunctures::par_b = 1.168642873<br>
TwoPunctures::par_m_plus = 0.453<br>
TwoPunctures::par_m_minus = 0.453<br>
TwoPunctures::par_P_plus [1] = +0.3331917498<br>
TwoPunctures::par_P_minus[1] = -0.3331917498<br>
<br>
#TwoPunctures::grid_setup_method = "evaluation"<br>
<br>
TwoPunctures::TP_epsilon = 1.0e-2<br>
TwoPunctures::TP_Tiny = 1.0e-2<br>
<br>
TwoPunctures::keep_u_around = "yes"<br>
<br>
CT_MultiLevel::cycle_type = "FMG cycle"<br>
CT_MultiLevel::tol = 1e-12<br>
CT_MultiLevel::omega = 1<br>
CT_MultiLevel::fd_order = 4<br>
CT_MultiLevel::output_norms = "yes"<br>
CT_MultiLevel::output_walk = "yes"<br>
CT_MultiLevel::nrelsteps_down = 700<br>
CT_MultiLevel::nrelsteps_up = 650<br>
CT_MultiLevel::nrelsteps_bottom = 700<br>
CT_MultiLevel::nrelsteps_top = 650<br>
CT_MultiLevel::topMGlevel = 4<br>
CT_MultiLevel::number_of_equations = 1<br>
CT_MultiLevel::number_of_auxiliaries = 1<br>
CT_MultiLevel::fill_ADM = "yes"<br>
CT_MultiLevel::fill_Aij = "Analytic Aij"<br>
CT_MultiLevel::boundary_conditions = "TwoPunctures"<br>
<br>
CT_MultiLevel::compare_to_exact = "yes"<br>
CT_MultiLevel::exact_solution_gfname[0] =
"TwoPunctures::puncture_u"<br>
CT_MultiLevel::exact_offset = -1.0<br>
<br>
CT_MultiLevel::inipsi_gfname[0] = "CT_Analytic::testinipsi"<br>
CT_MultiLevel::cxx_gfname[0] = "CT_Analytic::testcxx"<br>
CT_MultiLevel::cyy_gfname[0] = "CT_Analytic::testcyy"<br>
CT_MultiLevel::czz_gfname[0] = "CT_Analytic::testczz"<br>
CT_MultiLevel::n0[0] = -7<br>
CT_MultiLevel::c0_gfname[0] =
"CT_MultiLevel::ct_auxiliary[0]"<br>
CT_MultiLevel::a0_gfname[0] = "CT_Analytic::testa0"<br>
<br>
CT_MultiLevel::model = "Bowen-York"<br>
CT_Analytic::free_data = "Bowen-York"<br>
CT_Analytic::ampI = 1<br>
CT_Analytic::ampC = 1<br>
CT_Analytic::massa = 0.453<br>
CT_Analytic::massb = 0.453<br>
CT_Analytic::xa = 1.168642873<br>
CT_Analytic::xb = -1.168642873<br>
CT_Analytic::Pay = 0.3331917498<br>
CT_Analytic::Pby = -0.3331917498<br>
<br>
CT_Analytic::other_timelevels = 3<br>
<br>
#################################<br>
ActiveThorns = "CarpetIOBasic"<br>
#################################<br>
<br>
IOBasic::outInfo_every = 1<br>
IOBasic::outInfo_reductions = "norm2"<br>
IOBasic::outInfo_vars = "<br>
CT_MultiLevel::psi<br>
Carpet::physical_time_per_hour<br>
"<br>
<br>
#################################<br>
ActiveThorns = "CarpetIOScalar"<br>
#################################<br>
<br>
IO::out_dir = $parfile<br>
<br>
IOScalar::one_file_per_group = yes<br>
<br>
IOScalar::outScalar_every = 0<br>
IOScalar::outScalar_vars = "<br>
"<br>
<br>
#################################<br>
ActiveThorns = "CarpetIOASCII"<br>
#################################<br>
<br>
IOASCII::one_file_per_group = yes<br>
<br>
IOASCII::output_symmetry_points = yes<br>
IOASCII::out3D_ghosts = yes<br>
<br>
IOASCII::out0D_criterion = "divisor"<br>
IOASCII::out0D_every = 0<br>
IOASCII::out0D_vars = "<br>
"<br>
<br>
IOASCII::output_all_timelevels = "no"<br>
IOASCII::out1D_criterion = "divisor"<br>
IOASCII::out1D_every = 1<br>
IOASCII::out1D_vars = "<br>
CT_MultiLevel::psi<br>
CT_MultiLevel::residual<br>
CT_MultiLevel::err<br>
ADMBase::metric<br>
ADMBase::curv<br>
ML_BSSN::ML_log_confac<br>
ML_BSSN::ML_ham<br>
TwoPunctures::puncture_u<br>
"<br>
<br>
IOASCII::out2D_every = 0<br>
IOASCII::out2D_criterion = "divisor"<br>
IOASCII::out2D_vars = "<br>
"<br>
<br>
IOASCII::out3D_every = 0<br>
IOASCII::out3D_criterion = "divisor"<br>
IOASCII::out3D_vars = "<br>
CT_MultiLevel::psi<br>
CT_MultiLevel::coeffs<br>
"<br>
<br>
#################################<br>
Activethorns = "CarpetIOHDF5"<br>
#################################<br>
<br>
IOHDF5::out_criterion = "divisor"<br>
IOHDF5::out_every = 1<br>
IOHDF5::one_file_per_group = yes<br>
IOHDF5::compression_level = 0<br>
IOHDF5::out_vars = "<br>
CT_MultiLevel::psi<br>
CT_MultiLevel::err<br>
CT_MultiLevel::residual<br>
ML_BSSN::ML_log_confac<br>
ML_BSSN::ML_ham<br>
TwoPunctures::puncture_u<br>
"<br>
<br>
IOHDF5::checkpoint = "no"<br>
<br>
#################################<br>
ActiveThorns = "Formaline"<br>
#################################<br>
<br>
#################################<br>
ActiveThorns = "TimerReport"<br>
#################################<br>
<br>
TimerReport::out_every = 512<br>
TimerReport::out_filename = "TimerReport"</p>
<p><b><font color="#000345">My ouput shows -nan after first
itration.</font> </b></p>
<pre> 0 0.000 | 1.0013688 | 0.0000000
2 0.250 | -nan | 1.128073e+03
4 0.500 | -nan | 1.382569e+03
6 0.750 | -nan | 1.318078e+03
8 1.000 | -nan | 1.399377e+03
10 1.250 | -nan | 1.336436e+03
12 1.500 | -nan | 1.395822e+03
14 1.750 | -nan | 1.364895e+03
16 2.000 | -nan | 1.398991e+03
18 2.250 | -nan | 1.359115e+03
20 2.500 | -nan | 1.393235e+03
I set refinement levels, radius, topMG. no error found in running.
Kindly,
</pre>
</div>
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</blockquote></div>
</blockquote></div>