/usr/lib/python2.7/dist-packages/PySPH-1.0a4.dev0-py2.7-linux-x86_64.egg/pysph/sph/misc/advection.py is in python-pysph 0~20160514.git91867dc-4build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | """
Functions for advection
#######################
"""
from pysph.sph.equation import Equation
from numpy import cos, pi
class Advect(Equation):
def loop(self, d_idx, d_ax, d_ay, d_u, d_v):
d_ax[d_idx] = d_u[d_idx]
d_ay[d_idx] = d_v[d_idx]
class MixingVelocityUpdate(Equation):
def __init__(self, dest, sources, T):
self.T = T
super(MixingVelocityUpdate, self).__init__(dest, sources)
def loop(self, d_idx, d_u, d_v, d_u0, d_v0, t=0.1):
d_u[d_idx] = cos(pi*t/self.T) * d_u0[d_idx]
d_v[d_idx] = -cos(pi*t/self.T) * d_v0[d_idx]
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