!HEAT

Definition of control data regarding calculation

Parameter

TIMEPOINTS = Time list name (specify with !TIME_POINTS, NAME)
BETA       = Parameter defining time integration scheme
             Default for steady calculation: 1.0 (Backward difference)
             Default for unsteady calculation: 0.5 (Crank-Nicolson method)

** 2nd line or later **

(2nd line) DT, ETIME, DTMIN, DELTMX, ITMAX, ESP

Parameter Name	Attributions	Contents
DT	R	Initial time increment ≦ 0: Steady calculation > 0: Unsteady calculation
ETIME	R	Unsteady calculation time (mandatory for unsteady calculation)
DTMIN	R	Minimum time increment ≦ 0: Fixed time increment > 0: Auto time increment
DELTMX	R	Allowable change in temperature
ITMAX	I	Maximum number of iterations of nonlinear calculation (Default: 20)
EPS	R	Convergence judgment value (Default: 1.0e-6)

Example of Use

!HEAT
(No data)               ----- Steady calculation
!HEAT
0.0                     ----- Steady calculation
!HEAT
10.0, 3600.0            ----- Fixed time increment unsteady calculation
!HEAT
10.0, 3600.0, 1.0       ----- Auto time increment unsteady calculation
!HEAT
10.0, 3600.0, 1.0, 20.0 ----- Auto time increment unsteady calculation

Remarks

Only when performing auto time increment unsteady calculation, TIMEPOINTS parameter can be used to specify time points at which results and/or visualization files are output.