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	tadd separate functions for viscous dissipation - sphere - GPU-based 3D discret…
	git clone git://src.adamsgaard.dk/sphere
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	---
	commit c62854c9bfc6be53c2155553666379bbdada700c
	parent a1bd00c040694d453ddfdc6742b1050d14ac2215
	Author: Anders Damsgaard <[email protected]>
	Date: Fri, 20 Jun 2014 11:46:18 +0200

	add separate functions for viscous dissipation

	Diffstat:
	M python/sphere.py \| 28 ++++++++++++++++++++++++++++

	1 file changed, 28 insertions(+), 0 deletions(-)
	---
	diff --git a/python/sphere.py b/python/sphere.py
	t@@ -2671,6 +2671,7 @@ class sim:
	:param idx: Particle index
	:type idx: int
	:returns: The volume of the particle [m^3]
	+ :return type: float
	'''
	return V_sphere(self.radius[idx])

	t@@ -2681,6 +2682,7 @@ class sim:
	:param idx: Particle index
	:type idx: int
	:returns: The mass of the particle [kg]
	+ :return type: float
	'''
	return self.rho[0]*self.volume(idx)

	t@@ -2691,6 +2693,7 @@ class sim:
	:param idx: Particle index
	:type idx: int
	:returns: The kinetic energy of the particle [J]
	+ :return type: float
	'''
	return 0.5*self.mass(idx) \
	numpy.sqrt(numpy.dot(self.vel[idx,:], self.vel[idx,:]))*2
	t@@ -2706,6 +2709,31 @@ class sim:
	esum += self.kineticEnergy(i)
	return esum

	+ def viscousNormalEnergy(self, idx):
	+ '''
	+ Returns the viscous absorbed energy for a particle in the
	+ normal component of its contacts.
	+
	+ :param idx: Particle index
	+ :type idx: int
	+ :returns: The normal viscous energy of the particle [J]
	+ :return type: float
	+ '''
	+ return self.ev[idx]
	+
	+ def totalViscousNormalEnergy(self):
	+ '''
	+ Returns the total viscous absorbed energy for all particles
	+ (normal component).
	+
	+ :returns: The normal viscous energy of all particles [J]
	+
	+ '''
	+ esum = 0.0
	+ for i in range(self.np):
	+ esum += self.viscousNormalEnergy(i)
	+ return esum
	+
	def energy(self, method):
	'''
	Calculates the sum of the energy components of all particles.