code on python

code.py

@@ -0,0 +1,40 @@
+from fenics import *
+from mshr import *
+import numpy as np
+
+finalt = 5 #Final time
+steps = 5000 #number of steps
+dt = finalt/steps #time steps
+
+# model parameters
+mu = 0.001 #dynamic viscosity
+rho = 1 #density
+
+#creating mesh
+channel = Rectangle(Point(0,0), Point(2.2, 0.41))
+cylinder = Circle(Point(0.2,0.2), 0.05)
+domain = channel - cylinder
+mesh = generate_mesh(domain,64)
+
+#Defining spaces
+V = VectorFunctionSpace(mesh,'P', 2)
+Q = FunctionSpace(mesh, 'P', 1)
+
+#defining boundaries:
+inflow = 'near(x[0], 0)'
+outflow = 'near(x[0], 2.2)'
+walls = 'near(x[1], 0) || near(x[1], 0.41)'
+cylinder = 'on_boundary && x[0]>0.1 && x[0]<0.3 &&x[1]>0.1 && x[1]<0.3'
+
+#defining inflow profile
+inflowProfile('4.0*1.5*x[1]*(0.41-x[1])/pow(0.41,2)', '0')
+
+#defining boundary conditions:
+
+bcuInflow = DirichletBC(V,Expression(inflowProfile, degree=2), inflow)
+bcuWalls = DirichletBC(V, Constant((0, 0)), walls)
+bcuCylinder = DirichletBC(V, Constant((0,0)), cylinder)
+bcpOutflow = DirichletBC(Q, Constant(0), outflow)
+bcu = [bcuInflow, bcuWalls, bcuCylinder]
+bcp = [bcpOutflow]
+