[lammps-users] Modeling of fluid flow around CNTs using LAMMPS

Dear lammps users,

I have worked on Computational Fluid Dynamics (CFD) for some years, but I am now a beginner of lammps. I compiled it on my opensuse platform and made the lmp_opensuse file succeully. Then, I run the examples, e.g. Poisseuille and Couette flows and Pour (by adding the GRANULAR package) and viz them with xmove.
Now, I want to simulate a fluid flow around a Carbon NanoTube (CNT) in 3D channel and I could not find a step by step algorithm to do this. Already, I am familiar with input files of lammps examples, however, do not know how (where) to:

  1. Create the CNT structure and fix its sides in a 3D domain,
  2. Specifying the atom types (fluid and carbon) and the proper force fields,
  3. Implementing the In/Out boundary conditions,
  4. Making the input file of this problem.

Up to my knowledge, such structhures should be made in other codes like CHARMM or AMBER or etc which I have none of them. But I could not find a straight forward way to model this specific problem.
Can anyone help me out?

Thanks a lot,
Shidvash Vakilipour