**5. Conclusions**

In this paper, aerodynamic performances of a container ship in head wind have been simulated by CFD. From the obtained results, the interaction effect between hull and accommodation has been investigated. Furthermore, the obtained results in this paper have shown that the newly proposed frontal accommodation shapes can be used to considerably reduce wind drag acting on the container ships, leading to more economic fuel consumption in marine transportation. The main conclusions are summarized as follows:


**Author Contributions:** Conceptualization, N.V.H. (Ngo Van He), N.V.H. (Ngo Van Hien), V.-T.T. and N.-T.B.; methodology, N.V.H. (Ngo Van He), N.V.H. (Ngo Van Hien), V.-T.T. and N.-T.B.; software, N.V.H. (Ngo Van He), N.V.H. (Ngo Van Hien) and V.-T.T.; validation, N.V.H. (Ngo Van He), N.V.H. (Ngo Van Hien), V.-T.T. and N.-T.B.; writing—original draft preparation, N.V.H. (Ngo Van He), N.V.H. (Ngo Van Hien) and V.-T.T.; writing—review and editing N.V.H. (Ngo Van He), N.V.H. (Ngo Van Hien), V.-T.T. and N.-T.B.; supervision, N.V.H. (Ngo Van Hien); project administration, N.V.H. (Ngo Van He). All authors have read and agreed to the published version of the manuscript.

**Funding:** Vietnam National Foundation for Science and Technology Development (NAFOSTED).

**Acknowledgments:** This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under the grant number 107.03-2019.302. The authors would like to warmly express their thanks for the support.

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