Learning Forum

[rfn]

Hello.

I have performed a thermal transient analysis. The time is composed of 2 types of steps: small and big steps. The simulation time is 0.05 sec. From 0 to 0.005 sec, the time step is 0.0001 sec and from 0.005 to the end, the time step is 0.0005 sec.

When I try to plot the results, for instance the temperature, the plot doesn't show results from 0 sec on the time axis.

 

However, when I track the global temperature. I can see, it is starting from 0 sec.

I have tried different techniques like store results at all time points, specified recurrence rate and also added an apdl command 

/solu

allsel,all
OUTRES,ERASE
OUTRES,basic,all
OUTPR,basic,all

But nothing changed.

I would appreciate to solve this issue.

Thanks.

[danielshaw]

There is no solution at time=0.  For the MAPDL solver all time points must be positive and greater than zero.  If you want a near zero solution, begin with a very small initial time step.