stepgrid

Signature:

subroutine stepgrid(q, fm, fp, gm, gp, mitot, mjtot, mbc, dt, dtnew, dx, dy, nvar, xlow, ylow, time, mptr, maux, aux)

Arguments:

integer, intent(in):

• mbc: Number of ghost cells.
• mitot: Horizontal dimension of grid mptr, including ghost cells.
• mjtot: Vertical dimension of grid mptr, including ghost cells.
• nvar: Number of solution variables.
• mptr: Pointer to grid being stepped.
• maux: Number of aux variables.

double precision, intent(in):

• dt: Incoming time step.
• dx: Horizontal cell width of grid mptr.
• dy: Vertical cell width of grid mptr.
• xlow: Lower x-index of grid, including ghost cells.
• ylow: Lower y-index of grid, including ghost cells.

double precision, intent(inout):

• q(mitot,mjtot,nvar): Solution values on the grid, to be overwritten.
• aux(mitot,mjtot,maux): Aux variable values on the grid.

double precision, intent(out):

• fm(mitot,mjtot,nvar): Fluxes left of cell edges.
• fp(mitot,mjtot,nvar): Fluxes right of cell edges.
• gm(mitot,mjtot,nvar): Fluxes below cell edges.
• gp(mitot,mjtot,nvar): Fluxes above cell edges
• dtnew: Suggested new time step for this grid’s solution.

Description:

Takes a time step on the grid mptr.