I replaced chain with big particles in in.srd.mixture but i faced an error in following:
LAMMPS (31 Aug 2011)
Scanning data file …
1 = max bonds/atom
Reading data file …
orthogonal box = (-16.796 -16.796 -16.796) to (16.796 16.796 16.796)
1 by 1 by 1 processor grid
100 atoms
100 velocities
99 bonds
Finding 1-2 1-3 1-4 neighbors …
2 = max # of 1-2 neighbors
2 = max # of special neighbors
100 atoms in group big
Setting up run …
Memory usage per processor = 1.93834 Mbytes
Step Temp E_pair E_mol TotEng Press
0 1.5736018 0.13759668 20.465948 22.161411 0.54502583
WARNING: FENE bond too long: 321 78 79 1.69454
WARNING: FENE bond too long: 321 77 78 1.68475
WARNING: FENE bond too long: 321 76 77 1.51508
WARNING: FENE bond too long: 322 79 80 1.45978
WARNING: FENE bond too long: 322 78 79 1.99042
WARNING: FENE bond too long: 322 77 78 1.97158
WARNING: FENE bond too long: 322 75 76 1.55631
WARNING: FENE bond too long: 322 76 77 1.82491
WARNING: FENE bond too long: 323 79 80 1.71031
WARNING: FENE bond too long: 323 78 79 2.26035
WARNING: FENE bond too long: 323 77 78 2.22943
WARNING: FENE bond too long: 323 75 76 2.41985
WARNING: FENE bond too long: 323 76 77 2.24784
WARNING: FENE bond too long: 324 79 80 1.94411
WARNING: FENE bond too long: 324 78 79 2.29854
WARNING: FENE bond too long: 324 77 78 2.52584
WARNING: FENE bond too long: 324 75 76 3.05094
ERROR on proc 0: Bad FENE bond
Look at Section_errors of the manual. It explains this error
and says that you have to fix it. You are doing bad dynamics,
whether due to the SRD solvent or not. I would try running
dynamics without SRD first.
Steve