added corner flow test case generator

example/CMakeLists.txt

@@ -13,6 +13,7 @@ INSTALL_EXAMPLE( relperm )
 INSTALL_EXAMPLE( Poiseuille )
 INSTALL_EXAMPLE( Juanes )
 INSTALL_EXAMPLE( MicroModel )
+INSTALL_EXAMPLE( CornerFlow )
 INSTALL_EXAMPLE( Tiff )
 INSTALL_EXAMPLE( uCT )
 

example/CornerFlow/CornerFlow.py

@@ -0,0 +1,61 @@
+import numpy
+import math
+
+nx=128
+ny=64
+nz=64
+N=nx*ny*nz
+
+mesh=(nx,ny,nz)
+data=numpy.ones(mesh,dtype=numpy.int8)
+
+#ylinder centers
+c1x=-1.0
+c1y=0.0
+c2x=1.0
+c2y=0.0
+c3x=0.0
+c3y=math.sqrt(3.0)
+
+# domain size
+x0=-0.5
+y0=0.0
+L=1.0
+#2.0*(1.0-1.0/math.sqrt(2.0))
+dx=L/nz
+radius=1.0
+
+print("Mesh size: "+repr(mesh))
+print("Length: "+repr(L))
+print("dx: "+repr(dx))
+print("box corner: "+repr(x0)+","+repr(y0))
+print("cylinder 1: "+repr(c1x)+","+repr(c1y))
+print("cylinder 2: "+repr(c2x)+","+repr(c2y))
+print("cylinder 3: "+repr(c3x)+","+repr(c3y))
+
+#print(data)
+count=0
+# set up the tube with corner flow
+for i in range(0,nx):
+  for j in range(0,ny):
+    for k in range(0,nz):
+       z = i*dx
+       x = j*dx+x0
+       y = k*dx+y0
+       label=2
+       d1 = math.sqrt((x-c1x)*(x-c1x)+(y-c1y)*(y-c1y)) - radius
+       d2 = math.sqrt((x-c2x)*(x-c2x)+(y-c2y)*(y-c2y)) - radius
+       d3 = math.sqrt((x-c3x)*(x-c3x)+(y-c3y)*(y-c3y)) - radius
+       if d1 < 0.0:
+         label=0
+       if d2 < 0.0:
+         label=0
+       if d3 < 0.0:
+         label=0
+       data[i,j,k]=label
+       if label==2:
+         count+=1
+
+print(count)
+
+data.tofile("CornerFlow.raw")