Escoamentos rotacionais em diferentes velocidades: uma análise fluidodinâmica

Abstract

The study of Fluid Mechanics is essential in all engineering fields, providing fundamental foundations for understanding the behavior of fluids in different contexts. The introduction of Computational Fluid Dynamics (CFD) has revolutionized the study of fluids in technology, allowing for precise and detailed simulations of complex phenomena across a wide range of applications. In addition to advancing research and industrial development, the use of CFD is also highly beneficial for educational purposes, offering students a unique opportunity to explore and understand abstract concepts in a practical and interactive manner, preparing them for future engineering challenges. Thus, this study conducted a three-dimensional Computational Fluid Dynamics analysis in a specific scenario of laminar flow, characterized by a confined flow with angular movement and filled with an isothermal and incompressible Newtonian fluid. Three cases were studied, with different directions and rotation speeds of the walls for cases 1 and 2, and a change in geometry in case 3. The first case involved an annular geometry with the outer and inner walls rotating clockwise, but with speeds of 0.5 rad/s and 0.25 rad/s, respectively. The second case consisted of the same geometry and configuration as the previous case, with the only difference being the direction of rotation of the inner wall, which was counterclockwise. Finally, the third case involved a simple cylinder with the outer wall rotating clockwise at a speed of 0.5 rad/s. After simulating the cases, obtaining simulated and analytical results, and comparing these results, it was found that the simulation was successful in terms of tangential velocity magnitude values, with the largest deviation being 1.037% in case 3, which is an acceptable average deviation. It was thus concluded that the use of CFD is of great value in enhancing the visualization of case studies presented in Transport Phenomena and Fluid Mechanics classes.