Functions System

Overview

Functions are used to define functions depending only on spatial position and time: . These objects can serve a wide variety of purposes, including (but not limited to) the following:

  • defining initial conditions,

  • defining residual contributions (sources, boundary conditions, etc.), and

  • defining post-processing quantities.

Available Objects

  • Moose App
  • Axisymmetric2D3DSolutionFunctionFunction for reading a 2D axisymmetric solution from file and mapping it to a 3D Cartesian model
  • BicubicSplineFunctionDefine a bicubic spline function from interpolated data defined by input parameters.
  • CoarsenedPiecewiseLinearPerform a point reduction of the tabulated data upon initialization, then evaluate using a linear interpolation.
  • CompositeFunctionMultiplies an arbitrary set of functions together
  • ConstantFunctionA function that returns a constant value as defined by an input parameter.
  • ImageFunctionFunction with values sampled from an image or image stack.
  • LinearCombinationFunctionReturns the linear combination of the functions
  • ParsedFunctionFunction created by parsing a string
  • ParsedGradFunctionDefines a function and its gradient using input file parameters.
  • ParsedVectorFunctionReturn a vector component values based on a string function.
  • PiecewiseBilinearInterpolates values from a csv file
  • PiecewiseConstantDefines data using a set of x-y data pairs
  • PiecewiseLinearLinearly interpolates between pairs of x-y data
  • PiecewiseMulticonstantPiecewiseMulticonstant performs constant interpolation on 1D, 2D, 3D or 4D data. The data_file specifies the axes directions and the function values. If a point lies outside the data range, the appropriate end value is used.
  • PiecewiseMultilinearPiecewiseMultilinear performs linear interpolation on 1D, 2D, 3D or 4D data. The data_file specifies the axes directions and the function values. If a point lies outside the data range, the appropriate end value is used.
  • SolutionFunctionFunction for reading a solution from file.
  • SplineFunctionDefine a spline function from interpolated data defined by input parameters.
  • VectorPostprocessorFunctionProvides piecewise linear interpolation of from two columns of a VectorPostprocessor

Available Actions