**3. Future Trends in Fluid Mechanics**

The material that advances the state-of-the-art experimental, numerical, and theoretical methodologies or extends the bounds of existing methodologies through new contributions in coatings is still insufficient, even with the completion of this Special Issue. The rheological characteristics with thin films under the influence of different nanoparticles and shapes can help with the development of better applications in industry.

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

**Acknowledgments:** The guest editorial team of Coatings would like to thank all authors for contributing their original work to this special issue, no matter what the final decision on their submitted manuscript was. The editorial team would also like to thank all anonymous professional reviewers for their valuable time, comments, and suggestions during the review process. We also acknowledge the entire staff of the journal's editorial board for providing their cooperation regarding this Special Issue. We hope that this issue will, not only provide an overall picture and most up-to-date findings to readers from the scientific community working in the field, but would also benefit the industrial sectors in specific market niches and end users.

**Conflicts of Interest:** The author declares no conflict of interest.
