There is currently a growing interest in the area of drag reduction. In this paper, the thermal effects of body color of some species of aquatics like Orcas and Oceanic dolphins are investigated with respect to their swimming routes and geometric and behavioral characteristics. Considering the marine and atmospheric characteristics of these aquatics' routes, a thermal analysis is performed during their migration. The surrounding fluxes including the water flux, sun irradiation, and body temperature are considered in an energy balance to determine the skin temperature of the top side of the animal/organism's body. To study the effects of color on body temperature of the aquatic species, an experiment will be carried out in the water on a flat plate with black and white color. Applying a turbulent analytical solution for heated boundary layers, it will be shown that the black color on the top of the bodies of these marine organisms is very efficient in terms of skin drag reduction. Moreover, to investigate the effects of the temperature on underwater skin friction drag reduction, the turbulent flow will be simulated around a flat plate in COMSOL in different temperatures. This study will also provide the reason for this evolution of color scheme of these extremely fast marine animals, such as billfish, whales and sharks. This method of drag reduction can be considered as one of the effective factors in skin drag reduction of underwater robots.
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