SWFlow solver fixes.

proteus/SWFlow/README.md

@@ -1,6 +1,6 @@
 # Proteus -- SWFlow API
 
-The SWFlow API contains solvers for the the 2D nonlinear Shallow Water Equations, and the 2D dispersive Serre--Saint-Venant equations (also known as Green-Naghdi equations, nonlinear Boussinesq, etc.). Both models are
+The SWFlow API contains solvers for the the 2D nonlinear Shallow Water Equations, and the 2D dispersive Serre-Green-Naghdi equations (also known as Green-Naghdi equations, nonlinear Boussinesq, etc.). Both models are
 numerically solved using continuous, linear finite elements as seen in
 [Guermond, *et al* 2018](https://doi.org/10.1137/17M1156162), [Guermond *et al* 2019](https://doi.org/10.1016/j.jcp.2019.108917) and [Guermond *et al* 2020].
 

proteus/SWFlow/SWFlowProblem.py

@@ -36,7 +36,7 @@ def __init__(self,
         """ Constructor for structured meshes  """
         # ***** SET OF ASSERTS ***** #
         assert sw_model in [
-            0, 1], "sw_model={0,1} for shallow water equations or dispersive shallow water equations respectively"
+            0, 1], "sw_model={0,1} for shallow water equations or dispersive Serre-Green-Nagdhi respectively"
         assert cfl <= 1, "Choose cfl <= 1"
         assert isinstance(
             outputStepping, OutputStepping), "Provide an object from the OutputStepping class"
@@ -87,8 +87,8 @@ def __init__(self,
 
     def assert_initialConditions(self, sw_model, initialConditions):
         assert 'water_height' in initialConditions, 'Provide water_height in initialConditions'
-        assert 'x_mom' in initialConditions, 'Provide y_mom in initialConditions'
-        assert 'y_mom' in initialConditions, 'Provide x_mom in initialConditions'
+        assert 'x_mom' in initialConditions, 'Provide x_mom in initialConditions'
+        assert 'y_mom' in initialConditions, 'Provide y_mom in initialConditions'
         if sw_model == 1:  # dispersive SWEs
             assert 'h_times_eta' in initialConditions, 'Provide auxiliary function h_eta in initialConditions'
             assert 'h_times_w' in initialConditions, 'Provide auxiliary function h_w in initialConditions'
@@ -170,8 +170,8 @@ def getFESpace(self):
 default_swe_parameters = {'LUMPED_MASS_MATRIX': 0,
                           'cfl': 0.33,
                           'SSPOrder': 3,
-                          'cE': 1}
+                          'cE': 1.0}
 default_GN_swe_parameters = {'LUMPED_MASS_MATRIX': 0,
                              'cfl': 0.33,
                              'SSPOrder': 3,
-                             'cE': 1}
+                             'cE': 1.0}

proteus/SWFlow/models/GN_sw_n.py

@@ -86,7 +86,7 @@
 # ******************************** #
 # ********** TOLERANCES ********** #
 # ******************************** #
-nl_atol_res = 1.0e-5
+nl_atol_res = 1.0e-7
 nl_rtol_res = 0.0
 l_atol_res = 1.0e-7
 l_rtol_res = 0.0