def advection_eqns ():
"""Returns flux, conserved, constant_fields"""
q = Conserved('q')
(w,) = q.fields(['w'])
u = Constant('u')
f = [u * w]
return f, q, []
def advection_eqns():
"""Returns flux, conserved, constant_fields"""
q = Conserved('q')
(w, ) = q.fields(['w'])
u = Constant('u')
f = [u * w]
return f, q, []
def shallow_water_eqns():
q = Conserved('q')
h, uh = q.fields(['h', 'uh'])
u = uh / h
g = Constant('g')
f = [uh, u * uh + .5 * g * h**2]
return f, q, []
def shallow_water_eqns():
q = Conserved('q')
h, uh = q.fields(['h', 'uh'])
u = uh / h
g = Constant('g')
f = [ uh ,
u * uh + .5 * g * h ** 2]
return f, q, []
def acoustic_eqns():
"""Returns flux, conserved, constant_fields"""
q = Conserved('q')
p, u = q.fields(['p', 'u'])
rho = Constant('rho')
K = Constant('bulk')
a = ConstantField('a')
b = ConstantField('b')
f = [a * K * u, b * p / rho]
return f, q, [a, b]
def acoustic_eqns ():
"""Returns flux, conserved, constant_fields"""
q = Conserved('q')
p, u = q.fields(['p','u'])
rho = Constant('rho')
K = Constant('bulk')
a = ConstantField('a')
b = ConstantField('b')
f = [ a*K*u ,
b*p/rho]
return f, q, [a,b]