def test_constant_model():
h_constant = ConvectiveModel(20 * units.W / units.meter**2 / units.kelvin)
h1_constant = ConvectiveModel(20 * units.W / units.centimeter**2 /
units.kelvin)
assert_equal(h_constant.h0, 20 * units.W / units.meter**2 / units.kelvin)
assert_equal(h1_constant.h0,
200000 * units.W / units.meter**2 / units.kelvin)
def test_wakao_model():
mat = Material(k=1 * units.watt / units.meter / units.kelvin,
cp=1 * units.joule / units.kg / units.kelvin,
mu=2 * units.pascal * units.second)
h_wakao = ConvectiveModel(mat=mat,
m_flow=1 * units.kg / units.g,
a_flow=1 * units.meter**2,
length_scale=1 * units.meter,
model='wakao')
assert_equal(h_wakao.mu, 2 * units.pascal * units.second)
rho = 100 * units.kg / units.meter**3
assert_equal(h_wakao.h(rho, 0 * units.pascal * units.second),
h_wakao.h(rho, 2 * units.pascal * units.second))
def test_wakao_model():
mat=Material(k=1*units.watt/units.meter/units.kelvin,
cp=1*units.joule/units.kg/units.kelvin,
mu=2*units.pascal*units.second
)
h_wakao = ConvectiveModel(mat=mat,
m_flow=1*units.kg/units.g,
a_flow=1*units.meter**2,
length_scale=1*units.meter,
model='wakao')
assert_equal(h_wakao.mu,
2*units.pascal*units.second)
rho = 100*units.kg/units.meter**3
assert_equal(h_wakao.h(rho, 0*units.pascal*units.second),
h_wakao.h(rho, 2*units.pascal*units.second))
def add_convection(self, env, h, area):
'''add convection in the self.conv dictionary
:param env: name of the component that heat is transfered to/from
:type env: str
:param h: heat transfer coefficient
:type h: float
:param area: heat transfer area
:type area: float
'''
if type(h) is not ConvectiveModel:
h = ConvectiveModel(h0=h)
self.conv[env] = {"h": h, "area": area}
def addConvBC(self, env, prev_comp, h, R):
'''add convective boundary condition
:param env: name of the environment for convective heat transfer
(the fluid)
:type env: str
:param prev_comp: name of the component that is immediately inside the
boundary component
:type prev_comp: str
:param h: convective heat transfer coefficient
:type h: float or obj of Convective Model
:param R: radius of the sphere
:type R: float
'''
if type(h) is not ConvectiveModel:
h = ConvectiveModel(h0=h)
self.convBC[env] = {"h": h, "prev_comp": prev_comp, "R": R}
Shell = Material('shell', k_shell, cp_shell, dm=rho_shell)
k_cool = 1 * units.watt / (units.meter * units.kelvin)
cp_cool = random.gauss(
2415.78, 2415.78 * 0.05) * units.joule / (units.kg * units.kelvin)
rho_cool = DensityModel(a=2415.6 * units.kg / (units.meter**3),
b=0.49072 * units.kg / (units.meter**3) / units.kelvin,
model="linear")
mu0 = 0 * units.pascal * units.second
cool = LiquidMaterial('cool', k_cool, cp_cool, rho_cool, mu0)
# Coolant flow properties
h_cool_rd = random.gauss(
4700.0, 4700.0 * 0.05) * units.watt / units.kelvin / units.meter**2
h_cool = ConvectiveModel(h0=h_cool_rd, mat=cool, model='constant')
m_flow = 976.0 * units.kg / units.second
t_inlet = units.Quantity(600.0, units.degC) # degrees C
mod = th.THComponent(name="mod",
mat=Moderator,
vol=vol_mod,
T0=t_mod,
alpha_temp=alpha_mod,
timer=ti,
sph=True,
ri=0.0 * units.meter,
ro=r_mod)
fuel = th.THComponent(name="fuel",
mat=Fuel,
rho_shell = DensityModel(a=1740. * units.kg / (units.meter**3),
model="constant")
Shell = Material('shell', k_shell, cp_shell, rho_shell)
k_cool = 1 * units.watt / (units.meter * units.kelvin)
cp_cool = 2415.78 * units.joule / (units.kg * units.kelvin)
rho_cool = DensityModel(a=2415.6 * units.kg / (units.meter**3),
b=0.49072 * units.kg / (units.meter**3) / units.kelvin,
model="linear")
mu0 = 0 * units.pascal * units.second
cool = LiquidMaterial('cool', k_cool, cp_cool, rho_cool, mu0)
# Coolant flow properties
# 4700TODO implement h(T) model
h_cool = ConvectiveModel(h0=4700.0 * units.watt / units.kelvin /
units.meter**2,
mat=cool,
model='constant')
m_flow = 976.0 * units.kg / units.seconds
t_inlet = units.Quantity(600.0, units.degC)
mod = th.THComponent(name="mod",
mat=Moderator,
vol=vol_mod,
T0=t_mod,
alpha_temp=alpha_mod,
timer=ti,
sph=True,
ri=0.0 * units.meter,
ro=r_mod)
fuel = th.THComponent(name="fuel",
cp_shell = 1650.0 * units.joule / (units.kg * units.kelvin)
rho_shell = DensityModel(a=1740. * units.kg / (units.meter**3),
model="constant")
Shell = Material('shell', k_shell, cp_shell, rho_shell)
k_cool = 1 * units.watt / (units.meter * units.kelvin)
cp_cool = 2415.78 * units.joule / (units.kg * units.kelvin)
rho_cool = DensityModel(a=2415.6 * units.kg / (units.meter**3),
b=0.49072 * units.kg / (units.meter**3) / units.kelvin,
model="linear")
cool = Material('cool', k_cool, cp_cool, rho_cool)
cool.mu = 4.638 * 10**5 / (650**2.79) * units.pascal * units.second
h_cool = ConvectiveModel(h0=4700.0 * units.watt / units.kelvin /
units.meter**2,
mat=cool,
m_flow=m_flow,
a_flow=a_flow,
length_scale=dp,
model='wakao')
mod = th.THComponent(name="mod",
mat=Moderator,
vol=vol_mod,
T0=t_mod,
alpha_temp=alpha_mod,
timer=ti,
sph=True,
ri=0.0 * units.meter,
ro=r_mod)
fuel = th.THComponent(name="fuel",
mat=Fuel,
def add_mass_trans(self, env, H, u):
if type(H) is not ConvectiveModel:
H = ConvectiveModel(h0=H)
self.mass[env] = {"H": H,
"u": u}
rho_cool = DensityModel(a=2415.6 *
units.kg /
(units.meter**3), b=0.49072 *
units.kg /
(units.meter**3) /
units.kelvin, model="linear")
mu0 = 0*units.pascal*units.second
cool = LiquidMaterial('cool', k_cool, cp_cool, rho_cool, mu0)
# Coolant flow properties
h_cool_rd = random.gauss(
4700.0,
4700.0*0.05)*units.watt/units.kelvin/units.meter**2
h_cool = ConvectiveModel(h0=h_cool_rd,
mat=cool,
model='constant')
m_flow = 976.0*units.kg/units.second
t_inlet = units.Quantity(600.0, units.degC) # degrees C
mod = th.THComponent(name="mod",
mat=Moderator,
vol=vol_mod,
T0=t_mod,
alpha_temp=alpha_mod,
timer=ti,
sph=True,
ri=0.0*units.meter,
ro=r_mod)
