MULTIPHASE FLUID TRANSPORT SIMULATION IN A NARROW SLIT USING LATTICE BOLTZMANN METHOD

• Main Author: Fikri, Hanifil
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/60495
• Institution: Institut Teknologi Bandung

This final project will discuss the topic of multiphase fluid transport simulation in a narrow slit with various variations. The variations used are straight slit geometry, narrow slit geometry, wide slit geometry, and variations in the adhesion force of the fluid to the solid being traversed. In the variation of straight slit geometry, data is obtained for different slit widths and fluid radii, while in variations of narrowed slit geometry and wide slit geometry, data is obtained for different slit widths and geometric angles. The method used in this case is the Lattice Boltzmann method which is an alternative method to the molecular dynamics method and the continuum method. The LBM method uses an approach with a mesoscopic scale perspective, namely looking at the statistical system using the distribution function. The fluid flow simulation carried out is in two-dimensional space, the fluid used in the simulation consists of one species and two phases (liquid and gas). Some of the boundary conditions used in this simulation are pressure limit conditions, periodic boundary conditions, and reflection limit conditions. The simulation stages using the LBM method consist of flow stages and collision stages. Through the geometric variations carried out, it can be concluded that in real fluids, which in this case are wetting fluids, there is a competition between the gravitational force and the adhesion force. When the width of the gap is getting bigger, the fluid that is not in contact with the solid is increasing, so that the attractive force between the fluid and the solid is increased. getting smaller, but the gravitational force is getting bigger and more dominant. Vice versa, when the fluid gets smaller, the more fluid interacts with the gap so that the interaction force is stronger and more dominant, but the gravitational force weakens. Through variations in the adhesion force, it can be concluded that the more negative the adhesion force used, the faster the fluid flow rate. It is hoped that this simulation can continue to be developed because it will be very useful in various industrial fields. There are several applications that can implement this fluid flow simulation, namely; Enhance oil recovery, geothermal energy systems, and potential self systems in mineral exploration.