I want to ask some questions about "pair_style dpd" .
please note that it is *extremely* difficult to give good advice on
very limited information.
1.When using pair_style dpd command,pair_coeff is used as "pair_coeff * *
1.0".If usingpair_style hybrid/overlay,is pair_coeff used as "pair_coeff dpd
* * 1.0"?
yes. and that is also what the documentation says.
1)pair_coeff * * 1.0 error:pair coeff for hybrid has
which is the expected behavior and in accord with the documentation
2)pair_coeff dpd * * 1.0 error:pair hybrid sub-style does not
support single call
this error has nothing to do with the question from above. this is due
to some *other* pair style and more importantly due some specific
computation like compute group/group that depends on having a single
pairwise potential evaluation available, which is typically not
2.Can pair_style dpd be applied on some group of atoms but not all atoms?
the hybrid pair style is designed to apply different pair styles on
different pairs of atom types. so for as long as you label your atoms
with different types, yes it is possible.