Species number, from 1 to 6. Must be specified.

Number of Tri-Diagonal Matrix Algorithm (TDMA) sweeps. Valid only for the TDMA method [MSMETH]. Defaults to 100.

Maximum number of iterations allowed for the semi-direct methods (conjugate residual and preconditioned conjugate residual methods, chosen with the MSMETH command). Defaults to 1000.

Number of search vectors used for the semi-direct methods. Defaults to 2. If you are using the Preconditioned BiCGStab Method (PBCGM) solver, the number of search directions is 1 to 8, with 2 as the default. New search vectors are made orthogonal to NSRCH previous vectors in the solution of the unsymmetric matrix systems.

Convergence criterion for the semi-direct methods. It represents the factor by which the inner product of the residual vector is reduced during the solution of the equations at any global iteration. Defaults to 1.0 x 10^-12. If the convergence criterion has not been achieved, the algebraic solver issues a warning message, and the execution of FLOTRAN continues normally.

Minimum normalized rate of change which will permit the semi-direct solution methods to continue. Used to terminate the semi-direct solvers in the event that stall occurs. Defaults to 1.0 x 10^-9. If the methods stall, the solver increments the solution only a very small amount despite the fact that the correct solution has been not been achieved (or perhaps even approached). The maximum nodal difference between the solutions, normalized to the value of the variable, is compared to DELMAX, and the solution is terminated if the value is less than DELMAX. Termination of the algebraic solver due to the small rate of change is considered a normal function, and no warning message is printed. Execution of FLOTRAN continues normally.