@inproceedings{SisLab4448, booktitle = {2021 International Symposium on Electrical, Electronics and Information Engineering (ISEEIE 2021)}, month = {February}, title = {Unsteady Vortex Dynamics of Two-Dimensional Pitching Flat Plate Using Lagrangian Vortex Method}, author = {Duong Viet Dung and Zuhal Lavi Rizki and Muhammad Hari}, year = {2021}, url = {https://eprints.uet.vnu.edu.vn/eprints/id/eprint/4448/}, abstract = {Vortex dynamics of wakes generated by two-dimensional rectan-gular pitching flat plates in free stream are examined with directnumerical simulation using Lagrangian vortex method. The devel-oped method simulates external flow around complex geometryby tracking local velocities and vorticities of particles, introducedwithin the fluid domain. The viscous effect is modeled using acore spreading method coupled with the splitting and merging spa-tial adaptation scheme. The particle?s velocity is calculated usingBiot-Savart formulation. To accelerate computation, Fast MultipoleMethod (FMM) is employed. The solver is validated by perform-ing an impulsively started cylinder at Reynolds number 550. Theresults of the computation have reasonable agreement with refer-ences listed in literature. For the vortex dynamics of pitching flatplate, the detaching LEV creates a remarkable peak in the lift forcebefore the end of motion for the different pitching cases. For thelow Reynolds number, force generated by the pitching flat plateis fairly independent of Reynolds numbers. The current studiesalso observed that TEV produced at higher Reynolds number has astronger suction than that at smaller Reynolds numbers.} }