SUBROUTINE GravityJac(REAL[] q, REAL[] dfdq, CELLINFO ci)

Defined In:

contrib/astro/physics/i_i_ODEs.f90

Inputs:

REAL[] q. The 1D array that holds the field values for the cell.

REAL[] dfdq. A 2D array that returns the Jacobian matrix of f with respect to the field variables in q.

CELLINFO ci. Contains info and constants used to toggle various derivative calculations.

Description:

Contributes gravity source terms to the ​Jacobian matrix dfdq. This subroutine orients gravity towards the lower left corner of the problem domain. Note that if ci%ScaleGravR3 is zero, then no changes are made.

Called In:

ODEs :: Jacobian2D()

Modules Used:

None.

Files Included:

None.