فهرست مطالب محمدحسین نهاوندیان

In this article, the status of research in Iran has been evaluated with a focus on the field of engineering and especially mechanical engineering. To achieve this goal, the quantity and quality of research have been studied and compared with developed and developing countries. The number of scientific publications has been used as the main quantitative index. In order to assess the quality of research, qualitative indicators such as the number of citations, the ratio of citation per document, the h-index, the scientific conferences and the top researchers have been analyzed. The results indicate that the quantity of the publications is favorable. In terms of the quantity of publications in the field of mechanical engineering, Iran ranked 14th in the world, and the ranking of the country is suitable for the h-index, which is a qualitative indicator of scientific production, while looking at the other qualitative index, which refers to the number of citation per document, the rank of Iran among the other countries is not suitable. In this article, suggestions have been made to improve the quality of research.

The biomimetic and hydrodynamic study of aquatic animals is one of the most challenging computational fluid dynamics topics in recent studies due to the complexity of body geometry and the type of flow field. The movement of the aquatic body, and particularly the tail section and the corresponding movement of fluid around the body, causes an unsteady flow and requires a comprehensive study of the interaction of fluid and aquatic body which makes the analysis more complicated. In this research, the main purpose is to investigate the numerical simulation of hydrodynamic flow around the aquatic body regarding dolphin swimming condition. Specifically, considering the precise 2D geometry of a dolphin body, the studied parameters include the drag and lift coefficients, body movement and its effect on vorticity, pressure and velocity fields immediately around the body. According to the results it can be claimed that the body movement frequency and the length of tail motion highly affect the mentioned parameters.