Gravity_accelOneRow.F90 File Reference

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Functions/Subroutines
subroutine	Gravity_accelOneRow_blkid (pos, sweepDir, blockID, numCells, grav, potentialIndex, extraAccelVars)
subroutine	Gravity_accelOneRow (pos, sweepDir, tileDesc, lo, hi, grav, Uin, potentialIndex, extraAccelVars)

Function/Subroutine Documentation

Gravity_accelOneRow()

subroutine Gravity_accelOneRow	(	integer, dimension(2)	pos,
		integer	sweepDir,
		type(Grid_tile_t)	tileDesc,
		integer	lo,
		integer	hi,
		real, dimension(lo:hi)	grav,
		real	Uin,
		integer	potentialIndex,
		integer	extraAccelVars
	)

Definition at line 71 of file Gravity_accelOneRow.F90.

Gravity_accelOneRow_blkid()

subroutine Gravity_accelOneRow_blkid	(	integer, dimension(2)	pos,
		integer	sweepDir,
		integer	blockID,
		integer	numCells,
		real, dimension(numCells)	grav,
		integer	potentialIndex,
		integer	extraAccelVars
	)

This routine computes the gravitational acceleration for a row of cells in a specified direction in a given block.

pos : Row indices transverse to the sweep direction sweepDir : The sweep direction: allowed values are SWEEP_X, SWEEP_Y, and SWEEP_Z. These values are defined in constants.h. blockID : The local identifier of the block to work on numCells : Number of cells to update in grav() grav() : Array to receive result potentialIndex : Variable # to take as potential if present ( this argument is applicable only in self-gravity formulated as Poisson's equation) extraAccelVars - if specified, Variables from which extra accelerations are taken. Used to identify the UNK variables that contain sink-on-gas accelerations when sink particles are used.

NOTES

The following applies to Gravity implementations which solve the Poisson problem for self-gravity: If certain variables declared by the sink particles inplementation are declared, it is assumed that sink particles are in use. The sets of variables to make this determination are o those given by extraAccelVars extraAccelVars if present; o {SGXO_VAR, SGYO_VAR, SGZO_VAR} if potentialIndex is GPOL_VAR; o {SGAX_VAR, SGAY_VAR, SGAZ_VAR} otherwise. If it is assumed that sink particles are in use, then the acceleration returned in the grav array will have the appropriate sink particle acceleration component added to the acceleration computed by differencing the potential variable given by potentialIndex.

Definition at line 54 of file Gravity_accelOneRow.F90.