/DT/SPHCEL/Keyword3
Engine Keyword Generates the SPH cells time step control type.
Format
/DT/SPHCEL/Keyword3
$\text{\Delta}{T}_{sca}$ $\text{\Delta}{T}_{\mathrm{min}}$
Definitions
Data  Description  SI Unit Example 

Keyword3  Time step control type:
If Keyword3 is not specified, i.e. /DT/SPHCEL, then the shell elements will use the $\text{\Delta}{T}_{\mathrm{min}}$ is not used. 

$\text{\Delta}{T}_{sca}$  Scale factor on time step for option SPHCEL.  
$\text{\Delta}{T}_{\mathrm{min}}$  Minimum time step for option SPHCEL. 
Comments
 This option can be used with the
/DT/NODA. In such case, the criteria for deleting a
SPH cell (or stopping, or killing the computation) is:
(1) $$\text{\Delta}{T}_{\mathit{sca}}\cdot \sqrt{\frac{2m}{{K}^{*}}}\le \text{\Delta}{t}_{\mathrm{min}}$$with ${K}^{*}$ being the stiffness based on SPH interaction.
 Nodal time step is generally more robust.