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FunctionNeumannBC.C
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9 
10 #include "FunctionNeumannBC.h"
11 #include "Function.h"
12 
14 
17 {
19  params.addRequiredParam<FunctionName>("function", "The function.");
20  params.addClassDescription("Imposes the integrated boundary condition "
21  "$\\frac{\\partial u}{\\partial n}=h(t,\\vec{x})$, "
22  "where $h$ is a (possibly) time and space-dependent MOOSE Function.");
23  return params;
24 }
25 
27  : IntegratedBC(parameters), _func(getFunction("function"))
28 {
29 }
30 
31 Real
33 {
34  return -_test[_i][_qp] * _func.value(_t, _q_point[_qp]);
35 }
const VariableTestValue & _test
test function values (in QPs)
Definition: IntegratedBC.h:97
static InputParameters validParams()
Definition: IntegratedBC.C:22
The main MOOSE class responsible for handling user-defined parameters in almost every MOOSE system...
unsigned int _i
i-th, j-th index for enumerating test and shape functions
Boundary condition of a Neumann style whose value is computed by a user-defined function.
void addRequiredParam(const std::string &name, const std::string &doc_string)
This method adds a parameter and documentation string to the InputParameters object that will be extr...
unsigned int _qp
quadrature point index
const MooseArray< Point > & _q_point
active quadrature points
Base class for deriving any boundary condition of a integrated type.
Definition: IntegratedBC.h:18
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real
FunctionNeumannBC(const InputParameters &parameters)
static InputParameters validParams()
void addClassDescription(const std::string &doc_string)
This method adds a description of the class that will be displayed in the input file syntax dump...
const Function & _func
The function being used for setting the value.
virtual Real computeQpResidual() override
Method for computing the residual at quadrature points.
virtual Real value(Real t, const Point &p) const
Override this to evaluate the scalar function at point (t,x,y,z), by default this returns zero...
Definition: Function.C:41
registerMooseObject("MooseApp", FunctionNeumannBC)