LATTICE BOLTZMANN METHOD FOR MOVING BOUNDARY FLOW

• Main Author: Bryan
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/73828
• Institution: Institut Teknologi Bandung

The demand for high-performance fluid simulation involving complex, moving and interacting objects become a future target in CFD simulation that uses particle-based method. Most of the time, CFD simulation takes a long time even for benchmark problem, and therefore we will need another method to perform the simulation more effectively and more efficiently. In this undergraduate thesis, the performance of conventional Lattice Boltzmann Method (LBM) is developed and tested with a variety of test cases. The calculation of forces acting on the solid object is also done, using Momentum Exchange Algorithm (MEA). The results for the conventional LBM shows small relative error when compared to analytical, experimental and a variety of numerical results. Next, the Immersed Boundary Method (IBM) is added to LBM to simulate the moving boundary flow. In terms of results, small relative error is obtained, but only for low Reynolds number. The internal mass effect in the force and torque calculation is also included here. The moving boundary flow in this undergraduate thesis is done up to externally prescribed motion and low Reynolds number, considering the stability of the algorithm.