1 files changed, 67 insertions, 0 deletions
diff --git a/Examples/Tests/ElectrostaticSphereEB/analysis_rz.py b/Examples/Tests/ElectrostaticSphereEB/analysis_rz.py
new file mode 100755
index 000000000..bb170f921
--- /dev/null
+++ b/Examples/Tests/ElectrostaticSphereEB/analysis_rz.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+
+# Copyright 2019-2021 Yinjian Zhao
+#
+# This file is part of WarpX.
+#
+# License: BSD-3-Clause-LBNL
+
+# This script tests the embedded boundary in RZ.
+# A cylindrical surface (r=0.1) has a fixed potential 1 V.
+# The outer surface has 0 V fixed.
+# Thus the analytical solution has the form:
+# phi(r) = A+B*log(r), Er(r) = -B/r.
+
+# Possible errors:
+# tolerance: 0.004
+# Possible running time: < 1 s
+
+import os
+import sys
+
+import numpy as np
+import yt
+
+sys.path.insert(1, '../../../../warpx/Regression/Checksum/')
+import checksumAPI
+
+tolerance = 0.004
+
+fn = sys.argv[1]
+ds = yt.load( fn )
+
+all_data_level_0 = ds.covering_grid(level=0,left_edge=ds.domain_left_edge, dims=ds.domain_dimensions)
+phi = all_data_level_0['boxlib', 'phi'].v.squeeze()
+Er = all_data_level_0['boxlib', 'Ex'].v.squeeze()
+
+Dx = ds.domain_width/ds.domain_dimensions
+dr = Dx[0]
+rmin = ds.domain_left_edge[0]
+rmax = ds.domain_right_edge[0]
+nr = phi.shape[0]
+r = np.linspace(rmin+dr/2.,rmax-dr/2.,nr)
+B = 1.0/np.log(0.1/0.5)
+A = -B*np.log(0.5)
+
+err = 0.0
+errmax_phi = 0.0
+errmax_Er = 0.0
+for i in range(len(r)):
+    if r[i]>=0.1:
+        phi_theory = A+B*np.log(r[i])
+        Er_theory = -B/float(r[i])
+        err = abs( phi_theory - phi[i,:] ).max() / phi_theory
+        if err>errmax_phi:
+            errmax_phi = err
+        err = abs( Er_theory - Er[i,:] ).max() / Er_theory
+        # Exclude the last inaccurate interpolation.
+        if err>errmax_Er and i<len(r)-1:
+            errmax_Er = err
+
+print('max error of phi = ', errmax_phi)
+print('max error of Er = ', errmax_Er)
+print('tolerance = ', tolerance)
+assert(errmax_phi<tolerance and errmax_Er<tolerance)
+
+test_name = os.path.split(os.getcwd())[1]
+checksumAPI.evaluate_checksum(test_name, fn, do_particles=False)