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