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timprove functionality for determining shear stresses - sphere - GPU-based 3D d… |
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git clone git://src.adamsgaard.dk/sphere |
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commit af3ff5f94fe8c7134db7b7e7614fa7759368cacb |
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parent 69c1afc4ac0f4239d9f3b875c96a2962fae2076a |
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Author: Anders Damsgaard <[email protected]> |
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Date: Tue, 24 Feb 2015 10:51:51 +0100 |
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improve functionality for determining shear stresses |
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Diffstat: |
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M python/sphere.py | 27 +++++++++++++++++++-------- |
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1 file changed, 19 insertions(+), 8 deletions(-) |
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--- |
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diff --git a/python/sphere.py b/python/sphere.py |
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t@@ -5793,24 +5793,35 @@ class sim: |
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''' |
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self.ndem = numpy.asarray(ndem) |
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- def shearStress(self): |
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+ def shearStress(self, type='effective'): |
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''' |
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Calculates the sum of shear stress values measured on any moving |
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particles with a finite and fixed velocity. |
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+ :param type: Find the 'defined' or 'effective' (default) shear stress |
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+ :type type: str |
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+ |
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:returns: The shear stress in Pa |
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:return type: numpy.array |
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''' |
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- fixvel = numpy.nonzero(self.fixvel > 0.0) |
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- force = numpy.zeros(3) |
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+ if type == 'defined': |
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+ return self.w_tau_x[0] |
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- # Summation of shear stress contributions |
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- for i in fixvel[0]: |
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- if self.vel[i,0] > 0.0: |
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- force += -self.force[i,:] |
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+ elif type == 'effective': |
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- return force/(self.L[0]*self.L[1]) |
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+ fixvel = numpy.nonzero(self.fixvel > 0.0) |
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+ force = numpy.zeros(3) |
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+ |
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+ # Summation of shear stress contributions |
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+ for i in fixvel[0]: |
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+ if self.vel[i,0] > 0.0: |
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+ force += -self.force[i,:] |
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+ |
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+ return force/(self.L[0]*self.L[1]) |
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+ |
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+ else: |
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+ raise Exception('Shear stress type ' + type + ' not understood') |
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def visualize(self, method='energy', savefig=True, outformat='png', |
