Updated files to work correctly.

README.md

@@ -1 +1,6 @@
-Solve the boundary layer velocity profile using a finite difference method. Directly animate the result.
+# Blflow
+
+This code solves the boundary layer velocity profile that occurs due to an
+acoustic wave in the vicinity of a wall. In a small layer (the viscous boundary
+ layer thickness ($\delta_\nu$)), the presence of the wall affects the velocity
+  field which would otherwise be a "plug" flow.

blflow.py

@@ -46,15 +46,13 @@ def u_np1(un, tn, dt):
 un0 = np.zeros(n, float)
 t = 0
 un = un0
-# un.append(un0)
 
-# Make the plot
-# plt.ioff()
 f = plt.figure(1, figsize=(12, 6))
 
 linefd, = plt.plot(un0, y)
 linee, = plt.plot(un0, y)
-plt.legend(('Finite difference', 'Periodic exact'))
+plt.legend(('Finite difference', 'Periodic exact'),
+           loc='lower right')
 plt.ylim(0, 1)
 plt.xlim(-1.5, 1.5)
 plt.ylabel('Distance from wall [m]')
@@ -69,13 +67,13 @@ try:
         t += dt
         uold = un
         un = u_np1(uold, t, dt)
-        if(i % 100 == 0):
+        if(i % 25 == 0):
             linefd.set_xdata(un)
             linee.set_xdata(u_ex(t))
             f.canvas.draw_idle()
-            plt.pause(.00001)
-            if not plt.fignum_exists(1):
-                break
+            plt.pause(.000005)
+        if not plt.fignum_exists(1):
+            break
         i += 1
 except Exception:
     pass

parplateflow.py

@@ -41,26 +41,36 @@ def u_np1(un, tn, dt):
 un0 = zeros(n, float)
 t = 0
 un = un0
-# un.append(un0)
 
-# Make the plot
+f = plt.figure(1, figsize=(12, 6))
 linefd, = plt.plot(un0, y)
 linee, = plt.plot(un0, y)
-plt.legend(('Finite difference', 'Periodic exact'))
+plt.legend(('Finite difference', 'Periodic exact'),
+           loc='lower right')
 plt.ylim(-1, 1)
 plt.xlim(-1.5, 1.5)
-plt.ylabel('y')
-plt.xlabel('u')
-plt.grid('on')
+plt.ylabel('y [m]')
+plt.xlabel('Velocity [m/s]')
+plt.grid(True)
+plt.show(block=False)
 i = 0
 uold = un
-while(True):
-    t += dt
-    uold = un
-    un = u_np1(uold, t, dt)
-    if(i % 100 == 0):
-        linefd.set_xdata(un)
-        linee.set_xdata(u_ex(t))
-        plt.draw()
-        # print("Time:",t)
-    i += 1
+
+
+try:
+    while(True):
+        t += dt
+        uold = un
+        un = u_np1(uold, t, dt)
+        if(i % 25 == 0):
+            linefd.set_xdata(un)
+            linee.set_xdata(u_ex(t))
+            f.canvas.draw_idle()
+            plt.pause(.000005)
+        if not plt.fignum_exists(1):
+            break
+        i += 1
+except Exception:
+    pass
+
+exit(0)