Long Domain 1um Resolution (AMReX-Microelectronics#32)

* change plot.period to plot.intervals

* changed plot.period to plot.intervals

* updated Examples/Tests/Macroscopic_Maxwell/inputs_3d_LLG_noMs

* some tweaks Examples/Tests/Macroscopic_Maxwell/inputs_3d_LLG_noMs

* fixed bug in getting mag_exchange_init_style and mag_anisotropy_init_style

* EOL whitespace

* saving Ricky's test

* more tests

* B_nodal_flag was declared inside of a #ifdef WARPX_MAG_LLG, preventing compilation

Removed references to Bfield_fp_old as it is not used

* remove reference to Bfield_fp_old

* remove geometry.is_periodic and particle species stuff

* fix typo

* remove print statement

* more inputs file cleanup

* more description

* 4 walls

* do_pml not needed

* remove do_pml flag

* verbose=1

* cleanup

* infinite walls in y

* circuit updates

* more inputs

* tweak to prevent leakage

* EOL whitespace

* renname file

* cleanup

* renname stuff

* more comments

* cleanup

* remove bottom PEC wall

* Apply suggestions from code review

Co-authored-by: Revathi  Jambunathan <[email protected]>

* Apply suggestions from code review

Co-authored-by: Revathi  Jambunathan <[email protected]>

* Apply suggestions from code review

* long domain with 1um resolution ant ~5GHz current source

* Update Examples/Tests/circuits/inputs_longdomain

* Apply suggestions from code review

* fix unused inputs

* update README

Co-authored-by: rzamora2 <[email protected]>
Co-authored-by: jackieyao0114 <[email protected]>
Co-authored-by: RevathiJambunathan <[email protected]>
Co-authored-by: Revathi  Jambunathan <[email protected]>

Examples/Tests/circuits/README

@@ -22,4 +22,6 @@ inputs_current - provide a current source at the lo-y boundary inside the tube
 inputs_current_large - provide a current source at the lo-y boundary in a region larger than the tube
                        (and zero the current source inside the tube)
 
-inputs_silicon - same as inputs_2 but with the tube wall with -z normal replaced with silicon
+inputs_silicon - same as inputs_2 but with the tube wall with -z normal replaced with silicon
+
+inputs_longdomain - This is a 4um x 1.6cm x 4um domain with a current source with wavelength 1.6cm

Examples/Tests/circuits/inputs_longdomain

@@ -0,0 +1,59 @@
+################################
+####### GENERAL PARAMETERS ######
+#################################
+max_step = 100000
+amr.n_cell = 8 16000 8
+amr.max_grid_size = 16000
+amr.blocking_factor = 8
+geometry.coord_sys   = 0
+geometry.prob_lo     =  -4.e-6 -0.8e-2 -4.e-6
+geometry.prob_hi     =   4.e-6  0.8e-2  4.e-6
+amr.max_level = 0
+# use pec instead of pml overlaying current source so you don't get a reflection
+boundary.field_lo = periodic pec periodic
+boundary.field_hi = periodic pml periodic
+
+#################################
+############ NUMERICS ###########
+#################################
+warpx.verbose = 1
+warpx.use_filter = 0
+warpx.cfl = 0.9
+
+algo.em_solver_medium = macroscopic # vacuum/macroscopic
+
+algo.macroscopic_sigma_method = backwardeuler # laxwendroff or backwardeuler
+
+macroscopic.sigma_function(x,y,z) = "sigma_0"
+
+macroscopic.epsilon_function(x,y,z) = "epsilon_0"
+
+macroscopic.mu_function(x,y,z) = "mu_0 "
+
+#################################
+############ FIELDS #############
+#################################
+
+my_constants.pi = 3.14159265359
+my_constants.c = 299792458.
+my_constants.wavelength = 1.6e-2
+
+my_constants.sigma_0 = 0.
+my_constants.epsilon_0 = 8.8541878128e-12
+my_constants.mu_0 = 1.25663706212e-06
+
+warpx.B_excitation_on_grid_style = parse_B_excitation_grid_function
+
+warpx.Bx_excitation_flag_function(x,y,z) = "(y <= -0.8e-2 + 1.e-6) * (y >= -0.8e-2 - 1.e-6)"
+warpx.By_excitation_flag_function(x,y,z) = "0."
+warpx.Bz_excitation_flag_function(x,y,z) = "0."
+
+warpx.Bx_excitation_grid_function(x,y,z,t) = "cos((2*pi*x)/0.000016) * sin(2*pi*c/wavelength*t)"
+warpx.By_excitation_grid_function(x,y,z,t) = "0."
+warpx.Bz_excitation_grid_function(x,y,z,t) = "0."
+
+# Diagnostics
+diagnostics.diags_names = plt
+plt.intervals = 100
+plt.fields_to_plot = Ex Ey Ez Bx By Bz
+plt.diag_type = Full