Reply To: spg question

[Ram Gopisetti]

Hi Jiazhi, 

Try with the following pointers by giving importance to the first point as in the follows 

The way to avoid the negative volume error in SPG is to try the following changes in the SPG section card.

1. Turn off erode and mass scale in the control timestep ( most recommended).
2. Increase the dilation  DX, DY, and DZ parameters to say 1.8
3. Set the SMSTEP = 5 and increase pdamp to -0.01.  ( 8th parameter in the row 3 of section SPG card)

Cheers, Ram