DiracKernels System
Dirac Kernels are used to apply sources/loads at desired point locations in the mesh. The value of the loads is a user-input value. It is applied at the user-defined location and is effectively null outside of that location, hence the Dirac name.
The contribution to the residual is computing by evaluating, at each source location, the product of the test function value at that location by the value of the source/load.
Notable parameters
By default, the locations of the sources may not change during the simulation. If a source is detected as moving, the system will error and prompt the user to provide the allow_moving_sources parameter.
By default, only one source may provided at each location in the mesh, any additional source at the same location is automatically dropped. If multiple sources should share the same location, the user should provide the drop_duplicate_points.
Example input syntax
In this example, three ConstantPointSource are being applied to variable u with values 0.1 / -0.1 and -1 at position (0.2 0.3 0.0) / (0.2 0.8 0) and (0.8 0.5 0.8) respectively. u is solution to a diffusion equation with those three sources.
[DiracKernels]
[./point_source1]
type = ConstantPointSource
variable = u
value = 0.1
point = '0.2 0.3 0.0'
[../]
[./point_source2]
type = ConstantPointSource
variable = u
value = -0.1
point = '0.2 0.8 0.0'
[../]
[./point_source3]
type = ConstantPointSource
variable = u
value = -1.0
point = '0.8 0.5 0.8'
[../]
[]
Available Objects
- Moose App
- ConstantPointSourceResidual contribution of a constant point source term.
- FunctionDiracSourceResidual contribution from a point source defined by a function.
- ReporterPointSourceApply a point load defined by Reporter.
- VectorConstantPointSourceResidual contribution of a constant point source term.
Available Actions
- Moose App
- AddDiracKernelActionAdd a DiracKernel object to the simulation.