Numerical Study on Fluid Flows and Stirring in a Circular Cylinder Subjected to Circulatory Oscillation

회전요동하는 원통내의 유동 및 교반특성을 위한 수치해석적 연구

Incompressible flow inside a circular cylinder Including periodically oscillating free surface waves was studied primarily by using a numerical method. We developed a finite difference scheme based on the MAC method applicable to three-dimensional free-surface flows, and applied it to the present flow model to study tho flow characteristics as well as the fluid stirring. To verify the validity of our scheme, we performed a simple experiment for flow visualization. We found that the numerical results show a reasonable agreement with the observed flow patterns.