OOF2: The Manual
Direct (DirectMatrixSolver) — A non-iterative non-sparse matrix solver using LU decomposition. Uses a lot of memory. Not recommended if the finite element mesh is large.
DirectMatrixSolver is a matrix equation
solver used in AdvancedSolverMode. It uses the LAPACK
function to solve equations via LU
decomposition. This requires the matrix to to converted
from the sparse format used in OOF2 to a full represention, which
uses a lot of memory. It may be faster and more accurate for small