def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='ball', sources=None, gy=gz),
]),
Group(equations=[
TaitEOS(dest='fluid',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
TaitEOS(dest='wall',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
TaitEOS(dest='temp_wall',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
],
real=False),
Group(equations=[
ContinuityEquation(
dest='fluid',
sources=['fluid', 'temp_wall', 'wall'],
),
ContinuityEquation(
dest='temp_wall',
sources=['fluid', 'temp_wall', 'wall'],
),
ContinuityEquation(
dest='wall',
sources=['fluid', 'temp_wall', 'wall'],
),
MomentumEquation(dest='fluid',
sources=['fluid', 'wall', 'temp_wall'],
alpha=self.alpha,
beta=0.0,
c0=self.co,
gy=-9.81),
SolidFluidForce(
dest='fluid',
sources=['ball'],
),
XSPHCorrection(dest='fluid',
sources=['fluid', 'temp_wall', 'wall']),
]),
Group(equations=[
RigidBodyCollision(
dest='ball', sources=['ball', 'wall', 'temp_wall'], kn=1e5)
]),
Group(equations=[RigidBodyMoments(dest='ball', sources=None)]),
Group(equations=[RigidBodyMotion(dest='ball', sources=None)]),
]
return equations
def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='body', sources=None, gz=gz),
RigidBodyCollision(dest='body', sources=['tank'], kn=1e4, en=1)
]),
Group(equations=[RigidBodyMoments(dest='body', sources=None)]),
Group(equations=[RigidBodyMotion(dest='body', sources=None)]),
]
return equations
def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='cube', sources=None, gy=-9.81),
SummationDensity(dest='cube', sources=['fluid', 'cube'])
],
real=False),
Group(equations=[
TaitEOSHGCorrection(dest='cube',
sources=None,
rho0=self.solid_rho,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='fluid',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='tank',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
],
real=False),
Group(equations=[
ContinuityEquation(
dest='fluid',
sources=['fluid', 'tank', 'cube'],
),
ContinuityEquation(
dest='tank',
sources=['fluid', 'tank', 'cube'],
),
MomentumEquation(dest='fluid',
sources=['fluid', 'tank', 'cube'],
alpha=self.alpha,
beta=0.0,
c0=self.co,
gy=-9.81),
LiuFluidForce(
dest='fluid',
sources=['cube'],
),
XSPHCorrection(dest='fluid', sources=['fluid', 'tank']),
]),
Group(equations=[
RigidBodyCollision(dest='cube', sources=['tank'], kn=1e5)
]),
Group(equations=[RigidBodyMoments(dest='cube', sources=None)]),
Group(equations=[RigidBodyMotion(dest='cube', sources=None)]),
]
return equations
def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='body', sources=None, gz=gz),
RigidBodyCollision(
dest='body', sources=['tank'], k=1.0, d=2.0, eta=0.1, kt=0.1
)]
),
Group(equations=[RigidBodyMoments(dest='body', sources=None)]),
Group(equations=[RigidBodyMotion(dest='body', sources=None)]),
]
return equations
def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='ball', sources=None, gy=gz),
RigidBodyCollision(dest='ball',
sources=['wall', 'ball', 'temp_wall'],
kn=self.kn,
gamma_n=self.gamma_n,
mu=0.3)
]),
Group(equations=[RigidBodyMoments(dest='ball', sources=None)]),
Group(equations=[RigidBodyMotion(dest='ball', sources=None)]),
]
return equations
def get_equations(self):
equations = []
g1 = []
if self.boundaries is not None:
all = self.rigid_bodies + self.boundaries
else:
all = self.rigid_bodies
if self.child_rigid_bodies is not None:
all = all + self.child_rigid_bodies
for name in self.rigid_bodies:
g1.append(
BodyForce(dest=name,
sources=None,
gx=self.gx,
gy=self.gy,
gz=self.gz))
equations.append(Group(equations=g1, real=False))
g2 = []
if self.child_rigid_bodies is not None:
rigid_bodies = self.rigid_bodies + self.child_rigid_bodies
else:
rigid_bodies = self.rigid_bodies
for name in rigid_bodies:
g2.append(
RigidBodyCollision(dest=name,
sources=all,
kn=self.kn,
mu=self.mu,
en=self.en))
equations.append(Group(equations=g2, real=False))
g3 = []
for name in self.rigid_bodies:
g3.append(SumUpExternalForces(dest=name, sources=None))
equations.append(Group(equations=g3, real=False))
g4 = []
if self.child_rigid_bodies is not None:
for name in self.child_rigid_bodies:
g4.append(SumUpExternalForces(dest=name, sources=None))
equations.append(Group(equations=g4, real=False))
return equations
def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='cube', sources=None, gy=-9.81),
],
real=False),
Group(equations=[
ContinuityEquation(dest='fluid',
sources=['fluid', 'tank', 'cube']),
ContinuityEquation(dest='tank',
sources=['tank', 'fluid', 'cube'])
]),
# Tait equation of state
Group(equations=[
TaitEOSHGCorrection(dest='fluid',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='tank',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
],
real=False),
Group(equations=[
MomentumEquation(dest='fluid',
sources=['fluid', 'tank'],
alpha=self.alpha,
beta=0.0,
c0=self.co,
gy=-9.81),
AkinciRigidFluidCoupling(dest='fluid', sources=['cube']),
XSPHCorrection(dest='fluid', sources=['fluid', 'tank']),
]),
Group(equations=[
RigidBodyCollision(
dest='cube', sources=['tank', 'cube'], kn=1e5)
]),
Group(equations=[RigidBodyMoments(dest='cube', sources=None)]),
Group(equations=[RigidBodyMotion(dest='cube', sources=None)]),
]
return equations
def create_equations(self):
eqns = self.scheme.get_equations()
eqn1 = Group(equations=[
BodyForce(dest='cube', sources=None, gy=-9.81),
RigidBodyCollision(dest='cube', sources=['wall', 'cube'],
kn=1.0e5, en=0.8),
LiuFluidForce(dest='fluid', sources=['cube'])], real=False)
eqn2 = Group(equations=[
GroupParticles('cube', xmin=0.0, xmax=4.0, periodic_in_x=True)],
real=False)
eqn3 = Group(equations=[
RigidBodyMoments(dest='cube', sources=None)], real=False)
eqn4 = Group(equations=[
RigidBodyMotion(dest='cube', sources=None)], real=False)
eqns.append(eqn1)
eqns.append(eqn2)
eqns.append(eqn3)
eqns.append(eqn4)
return eqns
def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='ball', sources=None, gy=gz),
RigidBodyCollision(
dest='ball',
sources=['ball'],
kn=1e5,
en=0.1,
mu=0.25),
RigidBodyWallCollision(
dest='ball',
sources=['wall', 'temp_wall'],
kn=1e5,
en=0.2,
mu=0.25)
]),
Group(equations=[RigidBodyMoments(dest='ball', sources=None)]),
Group(equations=[RigidBodyMotion(dest='ball', sources=None)]),
]
return equations
def create_equations(self):
eqns = self.scheme.get_equations()
eqn1 = Group(equations=[
BodyForce(dest='obstacle', sources=None, gy=-9.81),
RigidBodyCollision(dest='obstacle',
sources=['wall'],
kn=1.0e4,
en=0.8)
],
real=False)
eqn2 = Group(
equations=[LiuFluidForce(dest='fluid', sources=['obstacle'])])
eqn3 = Group(
equations=[RigidBodyMoments(dest='obstacle', sources=None)])
eqn4 = Group(
equations=[RigidBodyMotion(dest='obstacle', sources=None)])
eqns.append(eqn1)
eqns.append(eqn2)
eqns.append(eqn3)
eqns.append(eqn4)
return eqns
def create_equations(self):
h0 = dx * hdx
co = 10.0 * self.geom.get_max_speed(g=9.81)
gamma = 7.0
alpha = 0.5
beta = 0.0
B = co * co * rho0 / gamma
equations = [
Group(equations=[
BodyForce(dest='obstacle', sources=None, gz=-9.81),
NumberDensity(dest='obstacle', sources=['obstacle']),
NumberDensity(dest='boundary', sources=['boundary']),
], ),
# Equation of state
Group(equations=[
TaitEOS(dest='fluid',
sources=None,
rho0=rho0,
c0=co,
gamma=gamma),
TaitEOSHGCorrection(dest='boundary',
sources=None,
rho0=rho0,
c0=co,
gamma=gamma),
TaitEOSHGCorrection(dest='obstacle',
sources=None,
rho0=rho0,
c0=co,
gamma=gamma),
],
real=False),
# Continuity, momentum and xsph equations
Group(equations=[
ContinuityEquation(dest='fluid',
sources=['fluid', 'boundary', 'obstacle']),
ContinuityEquation(dest='boundary', sources=['fluid']),
ContinuityEquation(dest='obstacle', sources=['fluid']),
MomentumEquation(dest='fluid',
sources=['fluid', 'boundary'],
alpha=alpha,
beta=beta,
gz=-9.81,
c0=co,
tensile_correction=True),
PressureRigidBody(dest='fluid',
sources=['obstacle'],
rho0=rho0),
XSPHCorrection(dest='fluid', sources=['fluid']),
RigidBodyCollision(dest='obstacle',
sources=['boundary'],
k=1.0,
d=2.0,
eta=0.1,
kt=0.1),
]),
Group(equations=[RigidBodyMoments(dest='obstacle', sources=None)]),
Group(equations=[RigidBodyMotion(dest='obstacle', sources=None)]),
]
return equations
def create_equations(self):
equations = [
Group(
equations=[
BodyForce(dest='cube', sources=None, gy=-9.81),
BodyForce(dest='wood', sources=None, gy=-9.81),
BodyForce(dest='small_tank', sources=None, gy=-9.81),
BodyForce(dest='outside', sources=None, gy=-9.81),
SummationDensity(dest='cube', sources=['fluid', 'cube']),
SummationDensity(dest='wood', sources=['fluid', 'wood']),
SummationDensity(dest='small_tank',
sources=['fluid', 'small_tank']),
SummationDensity(dest='outside',
sources=['fluid', 'outside'])
# NumberDensity(dest='cube', sources=['cube']),
],
real=False),
Group(equations=[
TaitEOSHGCorrection(dest='wood',
sources=None,
rho0=self.wood_rho,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='cube',
sources=None,
rho0=self.solid_rho,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='fluid',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='big_tank',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='small_tank',
sources=None,
rho0=self.wood_rho,
c0=self.co,
gamma=7.0),
TaitEOSHGCorrection(dest='outside',
sources=None,
rho0=self.ro,
c0=self.co,
gamma=7.0),
],
real=False),
Group(equations=[
ContinuityEquation(
dest='fluid',
sources=[
'fluid', 'small_tank', 'cube', 'wood', 'big_tank',
'outside'
],
),
ContinuityEquation(
dest='big_tank',
sources=[
'fluid', 'big_tank', 'cube', 'wood', 'small_tank',
'outside'
],
),
MomentumEquation(dest='fluid',
sources=['fluid', 'big_tank'],
alpha=self.alpha,
beta=0.0,
c0=self.co,
gy=-9.81),
LiuFluidForce(
dest='fluid',
sources=['cube'],
),
LiuFluidForce(
dest='fluid',
sources=['wood'],
),
LiuFluidForce(
dest='fluid',
sources=['small_tank'],
),
LiuFluidForce(
dest='fluid',
sources=['outside'],
),
# PressureRigidBody(dest='fluid', sources=['cube'],
# rho0=1500),
XSPHCorrection(dest='fluid', sources=['fluid', 'big_tank']),
]),
Group(equations=[
RigidBodyCollision(
dest='cube',
sources=['big_tank', 'wood', 'small_tank', 'outside'],
kn=1e6)
]),
Group(equations=[RigidBodyMoments(dest='cube', sources=None)]),
Group(equations=[RigidBodyMotion(dest='cube', sources=None)]),
Group(equations=[
RigidBodyCollision(
dest='wood',
sources=['big_tank', 'cube', 'small_tank', 'outside'],
kn=1e6)
]),
Group(equations=[RigidBodyMoments(dest='wood', sources=None)]),
Group(equations=[RigidBodyMotion(dest='wood', sources=None)]),
Group(equations=[
RigidBodyCollision(
dest='small_tank',
sources=['big_tank', 'cube', 'wood', 'outside'],
kn=1e6)
]),
Group(
equations=[RigidBodyMoments(dest='small_tank', sources=None)]),
Group(
equations=[RigidBodyMotion(dest='small_tank', sources=None)]),
Group(equations=[
RigidBodyCollision(
dest='outside',
sources=['big_tank', 'cube', 'small_tank', 'wood'],
kn=1e6)
]),
Group(equations=[RigidBodyMoments(dest='outside', sources=None)]),
Group(equations=[RigidBodyMotion(dest='outside', sources=None)]),
]
return equations
def create_equations(self):
equations = [
Group(equations=[
BodyForce(dest='block', sources=None, gy=gy),
NumberDensity(dest='block', sources=['block']),
NumberDensity(dest='solid', sources=['solid']),
], ),
# Equation of state is typically the Tait EOS with a suitable
# exponent gamma
Group(equations=[
TaitEOS(dest='fluid',
sources=None,
rho0=rho0,
c0=c0,
gamma=gamma),
TaitEOSHGCorrection(dest='solid',
sources=None,
rho0=rho0,
c0=c0,
gamma=gamma),
TaitEOSHGCorrection(dest='block',
sources=None,
rho0=rho0,
c0=c0,
gamma=gamma),
], ),
# Main acceleration block
Group(equations=[
# Continuity equation with dissipative corrections for fluid on fluid
ContinuityEquationDeltaSPH(
dest='fluid', sources=['fluid'], c0=c0, delta=0.1),
ContinuityEquation(dest='fluid', sources=['solid', 'block']),
ContinuityEquation(dest='solid', sources=['fluid']),
ContinuityEquation(dest='block', sources=['fluid']),
# Momentum equation
MomentumEquation(dest='fluid',
sources=['fluid', 'solid', 'block'],
alpha=alpha,
beta=beta,
gy=-9.81,
c0=c0,
tensile_correction=True),
PressureRigidBody(dest='fluid',
sources=['block', 'solid'],
rho0=rho0),
ViscosityRigidBody(
dest='fluid', sources=['block', 'solid'
], rho0=rho0, nu=nu),
# Position step with XSPH
XSPHCorrection(dest='fluid', sources=['fluid']),
RigidBodyCollision(dest='block',
sources=['solid'],
k=1.0,
d=2.0,
eta=0.1,
kt=0.1),
]),
Group(equations=[RigidBodyMoments(dest='block', sources=None)]),
Group(equations=[RigidBodyMotion(dest='block', sources=None)]),
]
return equations