[求助][讨论]View Output

sccfdrc

请教大家一个问题:
    这是View Output时的情况:
    Time Step #:       0 | DT size:  1.000E-06 | Current Time:  0.000E+00 s
   =======================================================================
   CPU Time at the end of =            0 time steps.

        End of Output Elapsed Time=  8.750000E-01 Delta-time=  8.750000E-01


   =======================================================================
   Time Step #:       1 | DT size:  1.000E-06 | Current Time:  1.000E-06 s
   =======================================================================
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           1
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           1
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           2
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           2
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           3
  Max. Sweeps reached for var = P
            ............................
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =         100
   CPU Time at the end of =            1 time steps.

        End of Output Elapsed Time=  7.162500E+01 Delta-time=  7.075000E+01


Relaxed dt for the next timestep:  0.15000E-05
  Fluid_2 Mass at the begining of this timestep:  0.19706E-07
   =======================================================================
   Time Step #:       2 | DT size:  1.500E-06 | Current Time:  2.500E-06 s
   =======================================================================
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           1
  Max. Sweeps reached for var = P
     ............................................
我用的是VOF,GRID DEFORMATION,FLOW分析问题,是瞬态求解.
DT size, Current Time, End of Output Elapsed Time, Delta-time分别是什么意思啊?
Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           1
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           1
  Max. Sweeps reached for var = P
  Data not Updated for variable =P at Iter =           2
...........................
  这些又是什么意思呢?
谢谢大家来回答!