Add status prints to examples without logging

The two aeroelastic deformation examples and the two unsteady
variable-geometry examples do not set up logging, so they appear
momentarily frozen after the solver runs and while its results are
saved and loaded. Print messages when the simulation has finished and
when saving and loading start and finish so users can see that the
scripts are still making progress.

Author: camUrban

examples/aeroelastic_unsteady_first_order_deformation.py

@@ -348,15 +348,20 @@
 example_solver.run(
     prescribed_wake=False,
 )
+print("The simulation has finished.")
 
 # Save the solved solver to a compressed JSON file. This allows us to load the results
 # later without re-running the simulation. Use ".json.gz" for gzip compression, which is
 # recommended over plain JSONs for all but the smallest, unmeshed geometry objects.
+print("Saving the solver...")
 ps.save("example_solver.json.gz", example_solver)
+print("Finished saving the solver.")
 
 # Load the saved solver. The loaded object is identical to the original and can be
 # passed to any output function.
+print("Loading the saved solver...")
 loaded_solver = ps.load("example_solver.json.gz")
+print("Finished loading the saved solver.")
 
 # Call the animate function on the loaded solver. This produces a GIF of the wake being
 # shed. The GIF is saved in the same directory as this script. Press "q", after

examples/aeroelastic_unsteady_first_order_deformation_mixed_wings.py

@@ -380,15 +380,20 @@
 example_solver.run(
     prescribed_wake=False,
 )
+print("The simulation has finished.")
 
 # Save the solved solver to a compressed JSON file. This allows us to load the results
 # later without re-running the simulation. Use ".json.gz" for gzip compression, which is
 # recommended over plain JSONs for all but the smallest, unmeshed geometry objects.
+print("Saving the solver...")
 ps.save("example_solver.json.gz", example_solver)
+print("Finished saving the solver.")
 
 # Load the saved solver. The loaded object is identical to the original and can be
 # passed to any output function.
+print("Loading the saved solver...")
 loaded_solver = ps.load("example_solver.json.gz")
+print("Finished loading the saved solver.")
 
 # Call the animate function on the loaded solver. This produces a GIF of the wake being
 # shed. The GIF is saved in the same directory as this script. Press "q", after

examples/unsteady_ring_vortex_lattice_method_solver_variable.py

@@ -327,15 +327,20 @@
     prescribed_wake=True,
     show_progress=True,
 )
+print("The simulation has finished.")
 
 # Save the solved solver to a compressed JSON file. This allows us to load the results
 # later without re-running the simulation. Use ".json.gz" for gzip compression, which is
 # recommended over plain JSONs for all but the smallest, unmeshed geometry objects.
+print("Saving the solver...")
 ps.save("example_solver.json.gz", example_solver)
+print("Finished saving the solver.")
 
 # Load the saved solver. The loaded object is identical to the original and can be
 # passed to any output function.
+print("Loading the saved solver...")
 loaded_solver = ps.load("example_solver.json.gz")
+print("Finished loading the saved solver.")
 
 # Call the animate function on the loaded solver. This produces a GIF of the wake being
 # shed. The GIF is saved in the same directory as this script. Press any key, after

examples/unsteady_ring_vortex_lattice_method_solver_variable_formation.py

@@ -321,15 +321,20 @@
     prescribed_wake=True,
     show_progress=True,
 )
+print("The simulation has finished.")
 
 # Save the solved solver to a compressed JSON file. This allows us to load the results
 # later without re-running the simulation. Use ".json.gz" for gzip compression, which is
 # recommended over plain JSONs for all but the smallest, unmeshed geometry objects.
+print("Saving the solver...")
 ps.save("example_solver.json.gz", example_solver)
+print("Finished saving the solver.")
 
 # Load the saved solver. The loaded object is identical to the original and can be
 # passed to any output function.
+print("Loading the saved solver...")
 loaded_solver = ps.load("example_solver.json.gz")
+print("Finished loading the saved solver.")
 
 # Now that we have run the solver, we can create an animation of the results.
 ps.output.animate(