Simulations of fluid-flexible body-thermal interaction

Abstract

Fluid-body interaction problems arise in many industrial fields, from artificial transports to offshore structures. The systems containing a moving body in a fluid are also widely observed in nature such as swimming fish, flying birds, trees shaking in the wind, or falling leaves. The no-slip boundary condition of the fluid should be satisfied on the body surface to consider the fluid-body interaction numerically, which is difficult to be achieved by using a previous numerical method when the body is deformed due to its flexibility or accelerated rapidly. In the present thesis, an immersed boundary method (IBM) is presented to examine the motion and deformation of the flexible body in the fluid, and various phenomena associated with biological propulsions are explored numerically. The IBM for fluid-flexible body-thermal interactions is developed by enhancing the previous approach, and the heat transfer system including a flexible body is proposed to enhance a thermal efficiency. The IBM proposed in the present thesis would help researchers of various fields such as mechanical, biological, electrical, or marine engineering to analyze the phenomena associated with fluid-body-thermal interaction and to solve engineering problems.