Adding comment to explain why a function space is passed twice to initialization

Author: IshaanDesai

FSI/cylinderFlap/OpenFOAM-FEniCS/Solid/cyl-flap.py

@@ -88,6 +88,7 @@ def remaining_boundary(x, on_boundary):
 force_boundary = AutoSubDomain(remaining_boundary)
 
 # Initialize the coupling interface
+# Function space V is passed twice as both read and write functions are defined using the same space
 precice_dt = precice.initialize(coupling_boundary, read_function_space=V, write_object=V,
                                 fixed_boundary=clamped_boundary_domain)
 

FSI/flap_perp/OpenFOAM-FEniCS/Solid/perp-flap.py

@@ -72,6 +72,7 @@ def neumann_boundary(x, on_boundary):
 force_boundary = AutoSubDomain(neumann_boundary)
 
 # Initialize the coupling interface
+# Function space V is passed twice as both read and write functions are defined using the same space
 precice_dt = precice.initialize(coupling_boundary, read_function_space=V, write_object=V,
                                 fixed_boundary=clamped_boundary_domain)