**4. Conclusions**

In this paper, the DPD simulation of a polymer chain through micro channel was investigated by consideration of Magneto Hydro-Dynamics (MHD) body force. The validation of results with analytical solution was presented and accuracy of simulation was in proper range (max. discrepancy was below 10%). Various physical properties of polymer chain in transition were studied, such as radius of gyration squared, velocity of mass center, and average kinetic temperature for short (20 beads) and long polymer chain (50 beads). For all cases, enhancing the *Ha*-value and *K* parameters provide less perturbations for both short and long length of polymer chains, in the case of *Ha* = 20 and *K* = 5000 around the 80% reduction in radius of gyration squared was resulted in this paper.

**Author Contributions:** R.Z. conducted modeling; the writing and revising of the article was carried out by R.Z. and M.S.; R.Z., A.M. and Z.A. supervised the research and edited it. All authors have read and agree to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflicts of interest.
