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Merge pull request #1398 from eepeterson/spherical_source

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Spherical source
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Paul Romano 2019-11-11 12:52:47 -06:00 • committed by GitHub
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11 changed files with 296 additions and 13 deletions
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41
docs/source/io_formats/settings.rst
View file

@ -423,12 +423,16 @@ attributes/sub-elements:
:type:
The type of spatial distribution. Valid options are "box", "fission",
"point", and "cartesian". A "box" spatial distribution has coordinates
sampled uniformly in a parallelepiped. A "fission" spatial distribution
samples locations from a "box" distribution but only locations in
fissionable materials are accepted. A "point" spatial distribution has
coordinates specified by a triplet. An "cartesian" spatial distribution
specifies independent distributions of x-, y-, and z-coordinates.
"point", "cartesian", and "spherical". A "box" spatial distribution has
coordinates sampled uniformly in a parallelepiped. A "fission" spatial
distribution samples locations from a "box" distribution but only
locations in fissionable materials are accepted. A "point" spatial
distribution has coordinates specified by a triplet. An "cartesian"
spatial distribution specifies independent distributions of x-, y-, and
z-coordinates. A "spherical" spatial distribution specifies independent
distributions of r-, theta-, and phi-coordinates where theta is the angle
with respect to the z-axis, phi is the azimuthal angle, and the sphere is
centered on the coordinate (x0,y0,z0).
*Default*: None
@ -446,6 +450,9 @@ attributes/sub-elements:
For an "cartesian" distribution, no parameters are specified. Instead,
the ``x``, ``y``, and ``z`` elements must be specified.
For a "spherical" distribution, no parameters are specified. Instead,
the ``r``, ``theta``, ``phi``, and ``origin`` elements must be specified.
*Default*: None
:x:
@ -466,6 +473,28 @@ attributes/sub-elements:
univariate probability distribution (see the description in
:ref:`univariate`).
:r:
For a "spherical" distribution, this element specifies the distribution
of r-coordinates. The necessary sub-elements/attributes are those of a
univariate probability distribution (see the description in
:ref:`univariate`).
:theta:
For a "spherical" distribution, this element specifies the distribution
of theta-coordinates. The necessary sub-elements/attributes are those of a
univariate probability distribution (see the description in
:ref:`univariate`).
:phi:
For a "spherical" distribution, this element specifies the distribution
of phi-coordinates. The necessary sub-elements/attributes are those of a
univariate probability distribution (see the description in
:ref:`univariate`).
:origin:
For a "spherical" distribution, this element specifies the coordinates of
the center of the sphere.
:angle:
An element specifying the angular distribution of source sites. This element
has the following attributes:

1
docs/source/pythonapi/stats.rst
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@ -46,5 +46,6 @@ Spatial Distributions
openmc.stats.Spatial
openmc.stats.CartesianIndependent
openmc.stats.SphericalIndependent
openmc.stats.Box
openmc.stats.Point

18
include/openmc/distribution_spatial.h
View file

@ -37,6 +37,24 @@ private:
UPtrDist z_; //!< Distribution of z coordinates
};
//==============================================================================
//! Distribution of points specified by spherical coordinates r,theta,phi
//==============================================================================
class SphericalIndependent : public SpatialDistribution {
public:
explicit SphericalIndependent(pugi::xml_node node);
//! Sample a position from the distribution
//! \return Sampled position
Position sample() const;
private:
UPtrDist r_; //!< Distribution of r coordinates
UPtrDist theta_; //!< Distribution of theta coordinates
UPtrDist phi_; //!< Distribution of phi coordinates
Position origin_; //!< Cartesian coordinates of the sphere center
};
//==============================================================================
//! Uniform distribution of points over a box
//==============================================================================

121
openmc/stats/multivariate.py
View file

@ -272,6 +272,8 @@ class Spatial(metaclass=ABCMeta):
distribution = get_text(elem, 'type')
if distribution == 'cartesian':
return CartesianIndependent.from_xml_element(elem)
elif distribution == 'spherical':
return SphericalIndependent.from_xml_element(elem)
elif distribution == 'box' or distribution == 'fission':
return Box.from_xml_element(elem)
elif distribution == 'point':
@ -281,7 +283,7 @@ class Spatial(metaclass=ABCMeta):
class CartesianIndependent(Spatial):
"""Spatial distribution with independent x, y, and z distributions.
This distribution allows one to specify a coordinates whose x-, y-, and z-
This distribution allows one to specify coordinates whose x-, y-, and z-
components are sampled independently from one another.
Parameters
@ -304,7 +306,6 @@ class CartesianIndependent(Spatial):
"""
def __init__(self, x, y, z):
super().__init__()
self.x = x
@ -375,6 +376,122 @@ class CartesianIndependent(Spatial):
return cls(x, y, z)
class SphericalIndependent(Spatial):
"""Spatial distribution represented in spherical coordinates.
This distribution allows one to specify coordinates whose :math:`r`,
:math:`\theta`, and :math:`\phi` components are sampled independently from
one another and centered on the coordinates (x0, y0, z0).
Parameters
----------
r : openmc.stats.Univariate
Distribution of r-coordinates
theta : openmc.stats.Univariate
Distribution of theta-coordinates (angle relative to the z-axis)
phi : openmc.stats.Univariate
Distribution of phi-coordinates (azimuthal angle)
origin: Iterable of float, optional
coordinates (x0, y0, z0) of the center of the sphere. Defaults to
(0.0, 0.0, 0.0)
Attributes
----------
r : openmc.stats.Univariate
Distribution of r-coordinates
theta : openmc.stats.Univariate
Distribution of theta-coordinates (angle relative to the z-axis)
phi : openmc.stats.Univariate
Distribution of phi-coordinates (azimuthal angle)
origin: Iterable of float, optional
coordinates (x0, y0, z0) of the center of the sphere. Defaults to
(0.0, 0.0, 0.0)
"""
def __init__(self, r, theta, phi, origin=(0.0, 0.0, 0.0)):
super().__init__()
self.r = r
self.theta = theta
self.phi = phi
self.origin = origin
@property
def r(self):
return self._r
@property
def theta(self):
return self._theta
@property
def phi(self):
return self._phi
@property
def origin(self):
return self._origin
@r.setter
def r(self, r):
cv.check_type('r coordinate', r, Univariate)
self._r = r
@theta.setter
def theta(self, theta):
cv.check_type('theta coordinate', theta, Univariate)
self._theta = theta
@phi.setter
def phi(self, phi):
cv.check_type('phi coordinate', phi, Univariate)
self._phi = phi
@origin.setter
def origin(self, origin):
cv.check_type('origin coordinates', origin, Iterable, Real)
origin = np.asarray(origin)
self._origin = origin
def to_xml_element(self):
"""Return XML representation of the spatial distribution
Returns
-------
element : xml.etree.ElementTree.Element
XML element containing spatial distribution data
"""
element = ET.Element('space')
element.set('type', 'spherical')
element.append(self.r.to_xml_element('r'))
element.append(self.theta.to_xml_element('theta'))
element.append(self.phi.to_xml_element('phi'))
element.set("origin", ' '.join(map(str, self.origin)))
return element
@classmethod
def from_xml_element(cls, elem):
"""Generate spatial distribution from an XML element
Parameters
----------
elem : xml.etree.ElementTree.Element
XML element
Returns
-------
openmc.stats.SphericalIndependent
Spatial distribution generated from XML element
"""
r = Univariate.from_xml_element(elem.find('r'))
theta = Univariate.from_xml_element(elem.find('theta'))
phi = Univariate.from_xml_element(elem.find('phi'))
origin = [float(x) for x in elem.get('origin').split()]
return cls(r, theta, phi, origin=origin)
class Box(Spatial):
"""Uniform distribution of coordinates in a rectangular cuboid.

67
src/distribution_spatial.cpp
View file

@ -51,6 +51,73 @@ Position CartesianIndependent::sample() const
return {x_->sample(), y_->sample(), z_->sample()};
}
//==============================================================================
// SphericalIndependent implementation
//==============================================================================
SphericalIndependent::SphericalIndependent(pugi::xml_node node)
{
// Read distribution for r-coordinate
if (check_for_node(node, "r")) {
pugi::xml_node node_dist = node.child("r");
r_ = distribution_from_xml(node_dist);
} else {
// If no distribution was specified, default to a single point at r=0
double x[] {0.0};
double p[] {1.0};
r_ = std::make_unique<Discrete>(x, p, 1);
}
// Read distribution for theta-coordinate
if (check_for_node(node, "theta")) {
pugi::xml_node node_dist = node.child("theta");
theta_ = distribution_from_xml(node_dist);
} else {
// If no distribution was specified, default to a single point at theta=0
double x[] {0.0};
double p[] {1.0};
theta_ = std::make_unique<Discrete>(x, p, 1);
}
// Read distribution for phi-coordinate
if (check_for_node(node, "phi")) {
pugi::xml_node node_dist = node.child("phi");
phi_ = distribution_from_xml(node_dist);
} else {
// If no distribution was specified, default to a single point at phi=0
double x[] {0.0};
double p[] {1.0};
phi_ = std::make_unique<Discrete>(x, p, 1);
}
// Read sphere center coordinates
if (check_for_node(node, "origin")) {
auto origin = get_node_array<double>(node, "origin");
if (origin.size() == 3) {
origin_ = origin;
} else {
std::stringstream err_msg;
err_msg << "Origin for spherical source distribution must be length 3";
fatal_error(err_msg);
}
} else {
// If no coordinates were specified, default to (0, 0, 0)
origin_ = {0.0, 0.0, 0.0};
}
}
Position SphericalIndependent::sample() const
{
double r = r_->sample();
double theta = theta_->sample();
double phi = phi_->sample();
double x = r*sin(theta)*cos(phi) + origin_.x;
double y = r*sin(theta)*sin(phi) + origin_.y;
double z = r*cos(theta) + origin_.z;
return {x, y, z};
}
//==============================================================================
// SpatialBox implementation
//==============================================================================

6
src/relaxng/settings.rnc
View file

@ -75,7 +75,11 @@ element settings {
attribute parameters { list { xsd:double+ } })? &
element x { distribution }? &
element y { distribution }? &
element z { distribution }?
element z { distribution }? &
element r { distribution }? &
element theta { distribution }? &
element phi { distribution }? &
element origin { list { xsd:double, xsd:double, xsd:double } }?
}? &
element angle {
(element type { xsd:string } | attribute type { xsd:string }) &

24
src/relaxng/settings.rng
View file

@ -348,6 +348,30 @@
<ref name="distribution"/>
</element>
</optional>
<optional>
<element name="r">
<ref name="distribution"/>
</element>
</optional>
<optional>
<element name="theta">
<ref name="distribution"/>
</element>
</optional>
<optional>
<element name="phi">
<ref name="distribution"/>
</element>
</optional>
<optional>
<element name="origin">
<list>
<data type="double"/>
<data type="double"/>
<data type="double"/>
</list>
</element>
</optional>
</interleave>
</element>
</optional>

2
src/source.cpp
View file

@ -86,6 +86,8 @@ SourceDistribution::SourceDistribution(pugi::xml_node node)
type = get_node_value(node_space, "type", true, true);
if (type == "cartesian") {
space_ = UPtrSpace{new CartesianIndependent(node_space)};
} else if (type == "spherical") {
space_ = UPtrSpace{new SphericalIndependent(node_space)};
} else if (type == "box") {
space_ = UPtrSpace{new SpatialBox(node_space)};
} else if (type == "fission") {

15
tests/regression_tests/source/inputs_true.dat
View file

@ -41,7 +41,7 @@
<angle reference_uvw="0.0 1.0 0.0" type="monodirectional" />
<energy parameters="988000.0 2.249e-06" type="watt" />
</source>
<source strength="0.2">
<source strength="0.1">
<space type="point">
<parameters>1.2 -2.3 0.781</parameters>
</space>
@ -50,4 +50,17 @@
<parameters>1.0 1.3894954943731377 1.93069772888325 2.6826957952797255 3.72759372031494 5.17947467923121 7.196856730011519 10.0 13.894954943731374 19.306977288832496 26.826957952797247 37.2759372031494 51.7947467923121 71.96856730011518 100.0 138.94954943731375 193.06977288832496 268.26957952797244 372.7593720314938 517.9474679231207 719.6856730011514 1000.0 1389.4954943731375 1930.6977288832495 2682.6957952797247 3727.593720314938 5179.474679231207 7196.856730011514 10000.0 13894.95494373136 19306.977288832495 26826.95795279722 37275.93720314938 51794.74679231213 71968.56730011514 100000.0 138949.5494373136 193069.77288832495 268269.5795279722 372759.3720314938 517947.4679231202 719685.6730011514 1000000.0 1389495.494373136 1930697.7288832497 2682695.7952797217 3727593.720314938 5179474.679231202 7196856.730011513 10000000.0 0.0 2.9086439299358713e-08 5.80533561806147e-08 8.67817193689187e-08 1.1515347785771536e-07 1.4305204600565115e-07 1.7036278261198208e-07 1.9697346200185813e-07 2.227747351856934e-07 2.4766057919761985e-07 2.715287327665956e-07 2.9428111652990295e-07 3.1582423606228735e-07 3.360695660646056e-07 3.549339141332686e-07 3.723397626156721e-07 3.882155871468592e-07 4.024961505584776e-07 4.151227709522976e-07 4.260435628367196e-07 4.3521365033538783e-07 4.4259535159179273e-07 4.4815833361210174e-07 4.5187973690993757e-07 4.5374426944091084e-07 4.5374426944091084e-07 4.5187973690993757e-07 4.4815833361210174e-07 4.4259535159179273e-07 4.352136503353879e-07 4.2604356283671966e-07 4.1512277095229767e-07 4.0249615055847764e-07 3.8821558714685926e-07 3.723397626156722e-07 3.5493391413326864e-07 3.360695660646057e-07 3.158242360622874e-07 2.942811165299031e-07 2.715287327665957e-07 2.4766057919762e-07 2.2277473518569352e-07 1.9697346200185819e-07 1.7036278261198226e-07 1.4305204600565126e-07 1.1515347785771556e-07 8.678171936891881e-08 5.805335618061493e-08 2.9086439299358858e-08 5.559621115282002e-23</parameters>
</energy>
</source>
<source strength="0.1">
<space origin="1.0 1.0 0.0" type="spherical">
<r parameters="2.0 3.0" type="uniform" />
<theta type="discrete">
<parameters>0.7853981633974483 1.5707963267948966 2.356194490192345 0.3 0.4 0.3</parameters>
</theta>
<phi parameters="0.0 6.283185307179586" type="uniform" />
</space>
<angle type="isotropic" />
<energy interpolation="histogram" type="tabular">
<parameters>1.0 1.3894954943731377 1.93069772888325 2.6826957952797255 3.72759372031494 5.17947467923121 7.196856730011519 10.0 13.894954943731374 19.306977288832496 26.826957952797247 37.2759372031494 51.7947467923121 71.96856730011518 100.0 138.94954943731375 193.06977288832496 268.26957952797244 372.7593720314938 517.9474679231207 719.6856730011514 1000.0 1389.4954943731375 1930.6977288832495 2682.6957952797247 3727.593720314938 5179.474679231207 7196.856730011514 10000.0 13894.95494373136 19306.977288832495 26826.95795279722 37275.93720314938 51794.74679231213 71968.56730011514 100000.0 138949.5494373136 193069.77288832495 268269.5795279722 372759.3720314938 517947.4679231202 719685.6730011514 1000000.0 1389495.494373136 1930697.7288832497 2682695.7952797217 3727593.720314938 5179474.679231202 7196856.730011513 10000000.0 0.0 2.9086439299358713e-08 5.80533561806147e-08 8.67817193689187e-08 1.1515347785771536e-07 1.4305204600565115e-07 1.7036278261198208e-07 1.9697346200185813e-07 2.227747351856934e-07 2.4766057919761985e-07 2.715287327665956e-07 2.9428111652990295e-07 3.1582423606228735e-07 3.360695660646056e-07 3.549339141332686e-07 3.723397626156721e-07 3.882155871468592e-07 4.024961505584776e-07 4.151227709522976e-07 4.260435628367196e-07 4.3521365033538783e-07 4.4259535159179273e-07 4.4815833361210174e-07 4.5187973690993757e-07 4.5374426944091084e-07 4.5374426944091084e-07 4.5187973690993757e-07 4.4815833361210174e-07 4.4259535159179273e-07 4.352136503353879e-07 4.2604356283671966e-07 4.1512277095229767e-07 4.0249615055847764e-07 3.8821558714685926e-07 3.723397626156722e-07 3.5493391413326864e-07 3.360695660646057e-07 3.158242360622874e-07 2.942811165299031e-07 2.715287327665957e-07 2.4766057919762e-07 2.2277473518569352e-07 1.9697346200185819e-07 1.7036278261198226e-07 1.4305204600565126e-07 1.1515347785771556e-07 8.678171936891881e-08 5.805335618061493e-08 2.9086439299358858e-08 5.559621115282002e-23</parameters>
</energy>
</source>
</settings>

2
tests/regression_tests/source/results_true.dat
View file

@ -1,2 +1,2 @@
k-combined:
2.800827E-01 7.360163E-03
3.004769E-01 3.944044E-03

12
tests/regression_tests/source/test.py
View file

@ -29,9 +29,16 @@ class SourceTestHarness(PyAPITestHarness):
x_dist = openmc.stats.Uniform(-3., 3.)
y_dist = openmc.stats.Discrete([-4., -1., 3.], [0.2, 0.3, 0.5])
z_dist = openmc.stats.Tabular([-2., 0., 2.], [0.2, 0.3, 0.2])
r_dist = openmc.stats.Uniform(2., 3.)
theta_dist = openmc.stats.Discrete([pi/4, pi/2, 3*pi/4],
[0.3, 0.4, 0.3])
phi_dist = openmc.stats.Uniform(0.0, 2*pi)
spatial1 = openmc.stats.CartesianIndependent(x_dist, y_dist, z_dist)
spatial2 = openmc.stats.Box([-4., -4., -4.], [4., 4., 4.])
spatial3 = openmc.stats.Point([1.2, -2.3, 0.781])
spatial4 = openmc.stats.SphericalIndependent(r_dist, theta_dist,
phi_dist,
origin=(1.0, 1.0, 0.0))
mu_dist = openmc.stats.Discrete([-1., 0., 1.], [0.5, 0.25, 0.25])
phi_dist = openmc.stats.Uniform(0., 6.28318530718)
@ -48,13 +55,14 @@ class SourceTestHarness(PyAPITestHarness):
source1 = openmc.Source(spatial1, angle1, energy1, strength=0.5)
source2 = openmc.Source(spatial2, angle2, energy2, strength=0.3)
source3 = openmc.Source(spatial3, angle3, energy3, strength=0.2)
source3 = openmc.Source(spatial3, angle3, energy3, strength=0.1)
source4 = openmc.Source(spatial4, angle3, energy3, strength=0.1)
settings = openmc.Settings()
settings.batches = 10
settings.inactive = 5
settings.particles = 1000
settings.source = [source1, source2, source3]
settings.source = [source1, source2, source3, source4]
settings.export_to_xml()