Hi Sergey. Be sure to keep [email protected] in the CC field so that others can find this thread if they are having the same issues.
I have used fix deform with fix nvt/sllod to shear bulk fluids and nanoparticle suspensions, and likewise fix viscosity. If you are interested in shearing a fluid between *moving* polymer walls you wont need these two fixes. You should read the documentation anyway. There are some subtle issues with thermostats, the stress tensor, and moving reference frames. You might also decide that they suit your needs.
It's still unclear what you are trying to do. That is, are you trying to shear a confined fluid between polymer walls, are you trying to model fluid flow *past* polymer walls - like Poiseuille flow? You need to be very specific.
Quoting "Romashevsky S." <[email protected]>: