| bongbang |
March 21, 2015 12:12 |
Transient run continues from last time (when startover is desired)
Although I am fairly new to Ansys, I have done many dozens of transient runs before. Every time, if a the CFX-Pre setup is modified and a run executed, the run restarts as expected from the specified initial time and ends at the specified duration. The monitors plot is reset and there's no evidence of continuance from the last run.
My latest run, however, appears to continue from last completed run even though I didn't do tell it to. The simulation time adds on that of the last run, the monitors plot continues, and the run quickly terminates because the duration is reached (duh!). How can I force the solver to restart at the initial time?
Here's the relevant code from the .out file. The initial time is still 0, although I shortened the duration to 0.02225 [s] from 0.89 [s] in the previous run.
Code:
ANALYSIS TYPE:
Option = Transient
EXTERNAL SOLVER COUPLING:
Option = None
END
INITIAL TIME:
Option = Automatic with Value
Time = 0 [s]
END
TIME DURATION:
Option = Total Time
Total Time = 0.02225 [s]
END
TIME STEPS:
Timesteps = 0.00445 [s]
Option = Timesteps
END
END
The simulation time is unexpectedly the sum of current time step to the last time step of the previous run.
Code:
CFD Solver started: Sat Mar 21 12:20:25 2015
+--------------------------------------------------------------------+
| Convergence History |
+--------------------------------------------------------------------+
======================================================================
| Timestepping Information |
----------------------------------------------------------------------
| Timestep | RMS Courant Number | Max Courant Number |
+----------------------+----------------------+----------------------+
| 4.4500E-03 | 7.32 | 43.20 |
----------------------------------------------------------------------
======================================================================
TIME STEP = 201 SIMULATION TIME = 8.9445E-01 CPU SECONDS = 8.057E+04
(THIS RUN: 1 4.4500E-03 2.256E+01)
----------------------------------------------------------------------
COEFFICIENT LOOP ITERATION = 1 CPU SECONDS = 2.256E+01
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 1.00 | 4.1E-05 | 7.6E-04 | 1.9E-01 ok|
| V-Mom | 1.00 | 3.7E-05 | 7.6E-04 | 1.9E-01 ok|
| W-Mom | 0.98 | 3.8E-04 | 1.0E-02 | 7.6E-03 OK|
| P-Mass | 0.68 | 6.9E-05 | 3.4E-03 | 8.6 9.7E-02 OK|
When the first time step is solved, the solver terminates.
Code:
CFD Solver finished: Sat Mar 21 12:21:56 2015
CFD Solver wall clock seconds: 9.0774E+01
======================================================================
Termination and Interrupt Condition Summary
======================================================================
CFD Solver: Run duration reached
(Maximum simulation time)
Thank you! |
