VISCOUS FLUID DYNAMICS AROUND MOVING OBJECT

• Main Author: An'umillah, Firaas
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71693
• Institution: Institut Teknologi Bandung

The Lattice-Boltzmann (LB) method was applied to numerical simulations of fluid flows around moving objects. This research is inspired by fish moving collectively and allows for advantages in various aspects, such as increasing the efficiency of movement and avoiding predators. To solve fluid-structure interaction cases with complex and dynamic geometries, the Lattice-Boltzmann method was combined with the Immersed Boundary (IB) method. The Immersed Boundary method divided solids and fluids into two coordinate systems in which the solid seems to be immersed in the mesh. Thus, the solid can move without having to reconstruct the mesh every time, reducing computation time. Numerical simulations were carried out to determine the effect of relaxation time, density ratio, and distance between two solids on the fluid dynamics around a moving object. The results of this study indicate that there is a shift in the position of the second solid every time period and differences in the velocity of the fluid flow around the solid.