Generated from /asc/home/flashdocs/FLASH3_33/source/physics/Diffuse/Diffuse_advance1D.F90 with ROBODoc v4.99.8 on Wed Oct 20 17:16:50 2010

**NAME**

Diffuse_advance1D

**SYNOPSIS**

call Diffuse_advance1D(integer(IN) :: nx, integer(IN) :: ny, integer(IN) :: nz, integer(IN) :: idirection, integer(IN) :: bctype(2), real(IN) :: del, real(IN) :: dt, real(IN) :: theta, real(IN) :: chi, real(IN) :: cond(nx,ny,nz), real(INOUT) :: soln(nx,ny,nz), logical(IN) :: useCFArray, real,OPTIONAL, pointer :: ConstFact(:,:,:))

**DESCRIPTION**

Subroutine to advance Diffusion in one dimension. This routine advances a diffusive operator (think heat conduction) in time. Generic form of the equation a*dV/dt = d/dx(b*dV/dx) + d/dy(b*dV/dy) + d/dz(b*dV/dz) i.e for Heat conduction, a=rho*Cv, b=conductivity and V=Temp

**ARGUMENTS**

nx : Total grid points along x-direction. ny : Total grid points along y-direction. nz : Total grid points along z-direction. idirection : Direction of solve bctype : Left and Right boundary condition type. Supports PERIODIC, OUTFLOW (tested). DIRICHLET,PNEUMAN (untested). del : dx,dy or dz based on direction of solve dt : timestep. theta : 0.5 CN Scheme, 1.0 Fully Implicit, 0.0 Explicit chi : Diffusion coefficient, not used anymore. cond : Spatial Conductivity variation (K) soln : discretised variation of variable to be diffused (input). On Output contains the diffused solution. useCFArray : Flag to determine if we have ConstFact(:,:,:) ConstFact : Spatial distributio of a factor (think rho*cv in heat conduction). !!

**SEE ALSO**

Grid_advanceDiffusion Diffuse

**NOTES**

This public API suubroutine is so far used only from the pencil grid implementation of Grid_advanceDiffusion. The pencil grid implementation of Grid_advanceDiffusion, in turn, is currently only used by the Split implementation of the DiffuseMain subunit.

High-Energy Density Physics

Thermonuclear-Powered Supernovae

Fluid-Structure Interaction

Implicit Solvers

Code Requests

Download

Contributed code

Flash Test downloads

Visualization downloads

Documentation and User Support

Publications

FLASH internal

The Flash Center for Computational Science is based at the University of Chicago and is supported by U.S. DOE and NSF.