bacillus command

fix ID group-ID nufeb/division/bacillus length seed keyword value ...

ID = user-assigned name for the fix
group-ID = ID of the group atoms to apply the fix to
diameter = threshold length to trigger division
seed = random # seed (positive integer)
zero keyword/value pair may be appended

keyword = normal or conserve

normal value = standard deviation of the normal distribution
conserve value = mass or length

Examples

#--- examples/rod-shape-ecoli ---#

 fix div all nufeb/division/bacillus 5e-6 1234 conserve length normal 1e-6

Description

Perform microbial division to the bacillus style atoms (atom_style bacillus) defined in group-ID. Division occurs when the bacillus length reaches the threshold value length. If the keyword normal is used, the threshold value is determined by a normal distribution with a mean of length and a standard deviation of normal. Upon division, the bacillus cell divides into two daughter cells of equal size. If the keyword conserve is given with a value of mass, the total mass of the two daughter cells is conserved. Otherwise, the total length will be conserved. After division, the contact point between the two daughter cells is the center of the parent cell.

The random seed is used for the stochastic operations, and the random numbers generated by each processor are different. This means the division length of individual atoms will be different when running on different numbers of processors.