**4. Conclusions**

We have investigated in this work the Darcy–Forchheimer hybrid nanofluid (Al2O3-Cu/H2O) boundary layer hydromagnetic flow over a stretch cylinder. The model equations are converted to a set of coupled ODEs by employing similarity transformations and appropriate boundary conditions. The impact of variation of dissimilar physical parameters over velocity profile, concentration, and temperature profile are graphically studied. We conclude the following:


**Author Contributions:** Conceptualization, methodology, software, validation, writing—original draft preparation, writing—review and editing, A.S., A.T., Z.S. and M.J.; conceptualization, methodology, software, visualization, writing—review and editing, W.D., A.K. and S.I.; writing—review and editing, visualization, project administration, funding acquisition, investigation, resources, A.T., W.D., A.S. and Z.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work is funded by the Deanship of Scientific Research at Majmaah University under Project Number (RGP-2019-28).

**Acknowledgments:** The authors extend their appreciation to the Deanship of Scientific Research at Majmaah University for funding this work under Project Number (RGP-2019-28).

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