added 3D_lungwave golden file

Author: mrodrig6

examples/3D_lungwave/case.py

@@ -102,7 +102,6 @@
             "a_x": 4.0e00,
             "x_a": -5.0,
             "x_b": 5.0,
-            #"loops_x": 0,
             "dt": dt,
             "t_step_start": tstart,
             "t_step_stop": tstop,
@@ -112,7 +111,6 @@
             "model_eqns": 3,
             "alt_soundspeed": "F",
             "num_fluids": 2,
-            #'adv_alphan'                   : 'T',
             "mpp_lim": "T",
             "mixture_err": "T",
             "time_stepper": 3,
@@ -148,9 +146,11 @@
             #'acoustic(1)%loc(3)'            : dlengz/2,
             "acoustic(1)%pulse": 3,
             "acoustic(1)%npulse": 1,
-            "acoustic(1)%wavelength": P_len,  # wavelength of the signal
+            # wavelength of the signal
+            "acoustic(1)%wavelength": P_len,
             "acoustic(1)%mag": P_amp_n,
-            "acoustic(1)%length": dlengy,  # length of the place ???
+            # length of the place
+            "acoustic(1)%length": dlengy,
             "acoustic(1)%height": dlengz,
             "acoustic(1)%dir": -math.pi,
             # Patch 1: Background