call Grid_dfsvCompleteSystem( integer(IN), dimension(VARDESC_SIZE) :: baseVarDesc, integer(IN) :: ntotVars, integer(IN) :: iSrc, integer(IN) :: bcTypes(6), real(IN) :: bcValues(2,6), real(IN) :: dt, real(IN) :: chi, real(IN) :: scaleFact, real(IN) :: theta, logical(IN) :: solnIsDelta, OPTIONAL,integer(IN) :: iFactorC, OPTIONAL,integer(IN) :: iFactorD, OPTIONAL,integer(IN) :: pass)
Completes setting matrix and vector data for a diffusion problem. The solver advances a generalized diffusion operator of the form A*(df/dt) + C*f = div(B*grad(f)) + D , where f = f(x,t) is the Variable to be diffused (x=1D..3D position); A,B,C,D are optional given scalar factors/terms that may depend on position; they are either physcially constant in time, or at least considered time-independent for the purpose of the operation implemented here (typically by computing their values from the solution state reached by the previous time step). Presently it is used to do heat conduction and multigroup diffusion.
baseVarDesc : A variable on which the diffusion operation is performed, usually an extra variable, used to identify the system ntotVars : total number or variables to solve for / equations to solve iFactorA :| Are factors in the equation with spatial variation. factorB :| Factor C,D are optional and are generally used iFactorC :| to represent emission/absorption in MGD. iFactorD :| | For this FcB variant of the interface, factorB is passed in | allocated scratch arrays, i.e., the implementation will have | to call Grid_ascGetBlkPtr to get at it. bcTypes : Presently OUTFLOW, VACUUM is supported, DIRICHLET is untested. bcValues : Values of iVar,factorB on boundary (DIRICHLET). dt : The time step. scaleFact : Factor by which the end solution is scaled (not used). chi : useful for constant diffusion problems (not used). theta : varies scheme (0-> Explicit, 1-> backward euler, 0.5 -> Crank Nicholson pass : Ignored in unsplit solver. pass=1 order of directional sweep X-Y-Z, pass=2 order of directional sweep Z-Y-X. iSrc : Ignored. solnIsDelta : Is the solution only a delta that the caller has to apply to the temperature, rather than temperature itself (ignored).
This implementation * supports: 1D, 2D, 3D Cartesian PARAMESH (with local refinement) 1D, 2D, 3D Cartesian in UG (3D untested). 1D Spherical in PARAMESH/UG 1D, 2D Cylindrical in PARAMESH/UG (R-Z) * uses HYPRE library to solve AX = B
Grid_dfsvCreateSystem Grid_dfsvBeginSystem Grid_dfsvAddToSystem Grid_advanceMultiDiffusion Diffuse_solveCoupledScalar