Numerical Simulation of Flow through a Circular Cylinder with 2 Rotating Controllers having Crucial-Shape Placed behind
Main Article Content
Abstract
When a fluid with coefficient Re ≥ 47 flows through a certain structure, they will interact with each other. This can cause oscillation and lead to the destruction of a structure due to the flow effects. One of the techniques to reduce structural vibration is to use sub-systems to change the flow structure. In this research, the immersed boundary method is applied to investigate the effect of controlling flow through a circular cylinder by placing two rotating controllers with crucial shape. The results showed that the lift force and drag force acting on the circular cylinder are significantly decreased. Besides, the influence from the placing position of 2 crucial to the drag coefficient and lift coefficient is also investigated. From the results, it can be concluded that 2 rotating crucial can eliminate the vortex and stabilize the flow if their position and rotating speed are reasonable.
Keywords
control flow, immersed boundary method, vortex, circular cylinder, rotating crucial
Article Details
References
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[2] Wu, H., Sun, D.P., Lu, L., Teng, B., Tang, G.Q., Song, J.N., Experimental investigation on flow suppression of vortex-induced vibration of long flexible riser by multiple control rods. Journal of Fluids and Structures 30, (2012) 115-132.
[3] Mittal, S., Raghavnanshi, A., Control of vortex shedding behind circular cylinder for flows at low Reynolds numbers. International Journal for Numerical Methods in Fluids, 35(4), (2001) 421-447.
[4] Badr, H.M., Coutanceau, M., Dennis, S. C. R., Menard, C., Unsteady flow past a rotating cylinder at Reynolds numbers 10^3 and 10^4. J Fluid Mech 220 (1990) 459-84.
[5] Mittal, S., Kumar, B., Flow past a rotating cylinder. J Fluid Mech 476 (2003) 303-324.
[6] Schulmeister, J. C., Dahl, J. M., Weymouth, G. D., Triantafyllou, M. S., Flow control with rotating cylinders. Journal of Fluid Mechanics, 825 (2017) 743-763.
[7] Dehkordi, E. K., Goodarzi, M., Nourbakhsh, S. H., Optimal active control of laminar flow over a circular cylinder using Taguchi and ANN. European Journal of Mechanics-B/Fluids, 67 (2018) 104-115.
[8] Norouzi, M., Varadi, S. R., Maghrebi, M. J., Shahmardan, Numerical investigation of viscoelastic shedding flow behind a circular cylinder. Journal of Non-Newtonian Fluid Mechanics, 197 (2013) 31-40.
[9] Riahi, H., Meldi, M., Favier, J., Serre, E., Goncalves, A., Pressure-corrected Immersed Boundary Method for the numerical simulation of compressible flows. Journal of Computational Physics, 374 (2018) 381-383.
[10] C. Liu, X. Zheng, C.H. Sung., Preconditioned Multigrid Methods for Unsteady Incompressible Flows. Journal of Computational Physics, 139 (1998) 35-57.
[11] D. Russell, Z. Jane Wang., A cartesian grid method for modeling multiple moving objects in 2D incompressible viscous flow. Journal of Computational Physics, 191 (2003) 177.