ABSTRACT
Vortex dynamics of wakes generated by two-dimensional rectangular pitching flat plates in free stream are examined with direct numerical simulation using Lagrangian vortex method. The developed method simulates external flow around complex geometry by tracking local velocities and vorticities of particles, introduced within the fluid domain. The viscous effect is modeled using a core spreading method coupled with the splitting and merging spatial adaptation scheme. The particle's velocity is calculated using Biot-Savart formulation. To accelerate computation, Fast Multipole Method (FMM) is employed. The solver is validated by performing an impulsively started cylinder at Reynolds number 550. The results of the computation have reasonable agreement with references listed in literature. For the vortex dynamics of pitching flat plate, the detaching LEV creates a remarkable peak in the lift force before the end of motion for the different pitching cases. For the low Reynolds number, force generated by the pitching flat plate is fairly independent of Reynolds numbers. The current studies also observed that TEV produced at higher Reynolds number has a stronger suction than that at smaller Reynolds numbers.
- P. G. Ifjuand, A. D. Jenkins, S. Ettingers, Y. Lian, W. Shyy, AIAA, (2002)Google Scholar
- K. D. Jones, F. M. Platzer, AIAA, 37 (2006)Google Scholar
- C. Ellington, Journal of Experimental Biology, 202 (1999)Google ScholarCross Ref
- M. H. Dickinson, K. G. Gotz, Journal of Experimental Biology, 174 (1993)Google ScholarCross Ref
- L. Greengard, V. Rokhlin, Journal of Computational Physics, 73 (1978)Google Scholar
- K. Kamemoto, Brazilian C. T. Sciences and Engineering, 26 (2005)Google Scholar
- D. V. Dung, L. R. Zuhal, H. Muhammad, Journal of Mechanical Engineering, 12 (2015)Google Scholar
- J. Zhou, R. J. Adrian, S. Balachandar, T. Kendall, J. F. M., 387 (1999)Google Scholar
- J. Jeong and F. Hussain, Journal of Fluid Mechanics, 285 (1995)Google ScholarCross Ref
- L. Graftieaux, M. Michard, N. Grosjean, M. S. T., 12 (2001)Google Scholar
- J. C. R. Hunt, A. Wray, P. Moin, Center for turbulence research report, (1988)Google Scholar
- J. D. Eldredge, Journal of Computational Physics, 221 (2007)Google ScholarDigital Library
Recommendations
Lagrangian vortex sheets for animating fluids
Buoyant turbulent smoke plumes with a sharp smoke-air interface, such as volcanic plumes, are notoriously hard to simulate. The surface clearly shows small-scale turbulent structures which are costly to resolve. In addition, the turbulence onset is ...
A Vortex Particle Method for Two-Dimensional Compressible Flow
A vortex particle method is developed for simulating two-dimensional, unsteady compressible flow. The method uses the Helmholtz decomposition of the velocity field to separately treat the irrotational and solenoidal portions of the flow, and the ...
Dynamics of vortex evolution in a 2D baffled tank
A finite difference method with coordinate transformation and fictitious cell approach were used to analyze the vortex generation and shedding phenomenon for sloshing liquid in 2D tanks with baffles. The detailed description of the dynamics of vortex ...
Comments