https://github.com/hpc-maths/GenEO
Tip revision: 47b05ef7165f6cee92daa3002503259f0ec84695 authored by gouarin on 28 May 2018, 11:31:32 UTC
fix binder
fix binder
Tip revision: 47b05ef
elasticity_3d_nonconst.py
from __future__ import print_function, division
import sys, petsc4py
petsc4py.init(sys.argv)
import mpi4py.MPI as mpi
from petsc4py import PETSc
import numpy as np
from elasticity import *
def rhs(coords, rhs):
x = coords[..., 0]
mask = x > 9.8
rhs[mask, 0] = 0
rhs[mask, 1] = -10
def lame_coeff(x, y, z, v1, v2):
output = np.empty(x.shape)
mask = np.logical_and(.4<=y, y<=.6)
output[mask] = v1
output[np.logical_not(mask)] = v2
return output
OptDB = PETSc.Options()
Lx = OptDB.getInt('Lx', 10)
Ly = OptDB.getInt('Ly', 1)
Lz = OptDB.getInt('Lz', 1)
n = OptDB.getInt('n', 16)
nx = OptDB.getInt('nx', Lx*n)
ny = OptDB.getInt('ny', Ly*n)
nz = OptDB.getInt('ny', Lz*n)
hx = Lx/(nx - 1)
hy = Ly/(ny - 1)
hz = Lz/(nz - 1)
da = PETSc.DMDA().create([nx, ny, nz], dof=3, stencil_width=1)
da.setUniformCoordinates(xmax=Lx, ymax=Ly, zmax=Lz)
# non constant young modulus
E = buildCellArrayWithFunction(da, lame_coeff, (100000, 30000))
# non constant Poisson coefficient
nu = buildCellArrayWithFunction(da, lame_coeff, (0.4, 0.4))
lamb = (nu*E)/((1+nu)*(1-2*nu))
mu = .5*E/(1+nu)
x = da.createGlobalVec()
b = buildRHS(da, [hx, hy, hz], rhs)
A = buildElasticityMatrix(da, [hx, hy, hz], lamb, mu)
A.assemble()
bcApplyWest(da, A, b)
ksp = PETSc.KSP().create()
ksp.setOperators(A)
ksp.setFromOptions()
ksp.solve(b, x)
viewer = PETSc.Viewer().createVTK('solution_3d_nonconst.vts', 'w', comm = PETSc.COMM_WORLD)
x.view(viewer)