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tuse default device - sphere - GPU-based 3D discrete element method algorithm w… |
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git clone git://src.adamsgaard.dk/sphere |
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--- |
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commit e1d35e9d6107dbbe53b9c8b5c62827bb2e0caf71 |
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parent 356ed98dc6fbcc6150173c8698fe3bdc15c523b6 |
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Author: Anders Damsgaard <[email protected]> |
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Date: Thu, 23 Oct 2014 11:56:09 +0200 |
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use default device |
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Diffstat: |
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A tests/cfd_tests_neumann-c=0.1.py | 78 +++++++++++++++++++++++++++++… |
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1 file changed, 78 insertions(+), 0 deletions(-) |
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--- |
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diff --git a/tests/cfd_tests_neumann-c=0.1.py b/tests/cfd_tests_neumann-c=0.1.py |
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t@@ -0,0 +1,78 @@ |
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+#!/usr/bin/env python |
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+from pytestutils import * |
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+ |
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+import sphere |
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+import sys |
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+import numpy |
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+import matplotlib.pyplot as plt |
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+ |
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+print('### CFD tests - Dirichlet/Neumann BCs ###') |
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+ |
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+print('''# Neumann bottom, Dirichlet top BC. |
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+# No gravity, no pressure gradients => no flow''') |
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+orig = sphere.sim("neumann", fluid = True) |
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+cleanup(orig) |
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+orig.defaultParams(mu_s = 0.4, mu_d = 0.4) |
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+orig.defineWorldBoundaries([0.4, 0.4, 1], dx = 0.1) |
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+orig.initFluid(mu = 8.9e-4) |
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+#orig.initFluid(mu = 0.0) |
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+orig.initTemporal(total = 0.05, file_dt = 0.005, dt = 1.0e-4) |
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+orig.c_v[0] = 0.1 |
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+#orig.c_phi[0] = 0.1 |
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+py = sphere.sim(sid = orig.sid, fluid = True) |
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+orig.bc_bot[0] = 1 # No-flow BC at bottom (Neumann) |
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+orig.run(dry=True) |
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+#orig.run(verbose=False) |
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+#orig.run(device=2) |
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+#orig.writeVTKall() |
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+py.readlast(verbose = False) |
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+ones = numpy.ones((orig.num)) |
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+py.readlast(verbose = False) |
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+compareNumpyArraysClose(ones, py.p_f, "Conservation of pressure:", |
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+ tolerance = 1.0e-5) |
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+ |
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+# Fluid flow along z should be very small |
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+if ((numpy.abs(py.v_f[:,:,:,:]) < 1.0e-6).all()): |
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+ print("Flow field:\t\t" + passed()) |
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+else: |
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+ print("Flow field:\t\t" + failed()) |
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+ print(numpy.min(py.v_f)) |
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+ print(numpy.mean(py.v_f)) |
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+ print(numpy.max(py.v_f)) |
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+ raise Exception("Failed") |
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+ |
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+print('''# Neumann bottom, Dirichlet top BC. |
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+# Gravity, pressure gradients => transient flow''') |
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+orig = sphere.sim("neumann", fluid = True) |
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+orig.defaultParams(mu_s = 0.4, mu_d = 0.4) |
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+orig.defineWorldBoundaries([0.4, 0.4, 1], dx = 0.1) |
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+orig.initFluid(mu = 8.9e-4) |
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+#orig.initTemporal(total = 0.05, file_dt = 0.005, dt = 1.0e-4) |
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+#orig.initTemporal(total = 0.05, file_dt = 0.005, dt = 0.001) |
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+orig.initTemporal(total = 0.5, file_dt = 0.05, dt = 1.0e-4) |
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+py = sphere.sim(sid = orig.sid, fluid = True) |
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+orig.g[2] = -10.0 |
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+orig.c_v[0] = 0.1 |
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+orig.bc_bot[0] = 1 # No-flow BC at bottom (Neumann) |
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+#orig.run(dry=True) |
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+orig.run(verbose=True) |
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+#orig.run(device=2) |
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+orig.writeVTKall() |
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+py.readlast(verbose = False) |
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+#ideal_grad_p_z = numpy.linspace( |
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+# orig.p_f[0,0,0] + orig.L[2]*orig.rho_f*numpy.abs(orig.g[2]), |
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+# orig.p_f[0,0,-1], orig.num[2]) |
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+ideal_grad_p_z = numpy.linspace( |
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+ orig.p_f[0,0,0] + (orig.L[2]-orig.L[2]/orig.num[2])*orig.rho_f*numpy.a… |
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+ orig.p_f[0,0,-1], orig.num[2]) |
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+compareNumpyArraysClose(ideal_grad_p_z, py.p_f[0,0,:], |
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+ "Pressure gradient:\t", tolerance=1.0) |
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+ |
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+# Fluid flow along z should be very small |
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+if ((numpy.abs(py.v_f[:,:,:,2]) < 1.0e-4).all()): |
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+ print("Flow field:\t\t" + passed()) |
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+else: |
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+ print("Flow field:\t\t" + failed()) |
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+ raise Exception("Failed") |
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+ |
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+#orig.cleanup() |
