The numerical investigation of flow and heat transfer characteristics of flow past a slit-cylinder
Source abstract
Abstract
The flow and heat transfer characteristics, including transition critical Reynolds number from two-dimensional to three-dimensional, the influence of slit-cylinder geometric parameter on Strouhal number, Nusselt number and forces acting on the slit-cylinder are numerically investigated. It’s found that transition critical Reynolds number from two-dimensional (flow wake deforms in two directions) to three-dimensional (flow wake deforms in three directions) increases with the augment of the slit width ratio in the range of present considered Reynolds number. The present results indicate that the three-dimensional vortex structures resulting from the deformation of the vortex shedding have significant effects on flow and heat transfer features such as Strouhal number, Nusselt number and forces acting on the cylinders with different ratios of slit width. It’s observed that the drag and lift coefficients reduce as the increase of slit width ratio, and vortex shedding is effectively suppressed by the slits. Moreover, the comprehensive heat transfer performance of the cylinder with the slits is significantly improved with the increase of the slit width ratio.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fluid Dynamics and Vibration Analysis · Wind and Air Flow Studies · Fluid Dynamics and Turbulent Flows
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Kumar R A, Sohn C H, Gowda B H L. Passive control of vortexinduced vibrations: An overview. Recent Patents Mech Eng, 2008, 1: 1–1110.2174/2212797610801010001 ↗
2. Thompson M, Hourigan K, Sheridan J. Three-dimensional instabilities in the wake of a circular cylinder. Exp Thermal Fluid Sci, 1996, 12: 190–19610.1016/0894-1777(95)00098-4 ↗
3. Teixeira P R F, Didier E. Numerical analysis of flow-induced vibration of two circular cylinders in tandem at low Reynolds numbers. In: Proceedings of European Conference on Computational Fluid Dynamics. Barcelona: Internation Center Numerical Methods Engineering, 2014
4. Serson D, Meneghini J R, Carmo B S, et al. Wake transition in the flow around a circular cylinder with a splitter plate. J Fluid Mech, 2014, 755: 582–60210.1017/jfm.2014.430 ↗
5. Olsen J F, Rajagopalan S. Vortex shedding behind modified circular cylinders. J Wind Eng Ind Aerodyn, 2000, 86: 55–6310.1016/S0167-6105(00)00003-9 ↗
6. Igarashi T. Flow characteristics around a circular cylinder with a slit: 1st report, flow control and flow patterns. Bull JSME, 1978, 21: 656–66410.1299/jsme1958.21.656 ↗
7. Igarashi T. Flow characteristics around a circular cylinder with a slit: 2nd report, effect of boundary layer suction. Bull JSME, 1982, 25: 1389–139710.1299/jsme1958.25.1389 ↗
8. Peng B H, Miau J J, Bao F, et al. Performance of vortex shedding from a circular cylinder with a slit normal to the stream. Flow Meas Instrum, 2012, 25: 54–6210.1016/j.flowmeasinst.2011.07.003 ↗
9. Gong S W, Chen L G, Xie Z H, et al. Constructal optimization of cylindrical heat sources with forced convection based on entransy dissipation rate minimization. Sci China Tech Sci, 2016, 59: 631–63910.1007/s11431-016-6012-7 ↗
10. Gu C W, Li H B, Song Y. Development of an aero-thermal coupled through-flow method for cooled turbines. Sci China Tech Sci, 2015, 58: 2060–207110.1007/s11431-015-5941-x ↗
11. Wang J S, Xu Y X, Tian Y S. Active control of circular cylinder flow by affiliated rotating cylinders. Sci China Tech Sci, 2013, 56: 1186–119710.1007/s11431-013-5208-3 ↗
12. Baek H, Karniadakis G E. Suppressing vortex-induced vibrations via passive means. J Fluids Struct, 2009, 25: 848–86610.1016/j.jfluidstructs.2009.02.006 ↗
13. Frank M. Fluid Mechanics. Beijing: Tsinghua University Press. 2004. 479–480
14. Williamson C H K. Vortex dynamics in the cylinder wake. Annu Rev Fluid Mech, 1996, 28: 477–53910.1146/annurev.fl.28.010196.002401 ↗
15. Nakamura H, Igarashi T. Variation of Nusselt number with flow regimes behind a circular cylinder for Reynolds numbers from 70 to 30000. Int J Heat Mass Transfer, 2004, 47: 5169–517310.1016/j.ijheatmasstransfer.2004.05.034 ↗
16. Lecointe Y, Piquet J. On the use of several compact methods for the study of unsteady incompressible viscous flow round a circular cylinder. Comp Fluids, 1984, 12: 255–28010.1016/0045-7930(84)90009-4 ↗
17. Churchill S W, Bernstein M. A correlating equation for forced convection from gases and liquids to a circular cylinder in crossflow. J Heat Transfer, 1977, 99: 300–30610.1115/1.3450685 ↗
18. Rosenfeld M, Kwak D, Vinokur M. A fractional step solution method for the unsteady incompressible navier-stokes equations in generalized coordinate systems. J Comp Phys, 1991, 94: 102–13710.1016/0021-9991(91)90139-C ↗
19. Kundsen J G, Katz D L. Fluid dynamics and heat transfer. New York: McGraw-Hill Book Company, 1958
20. Laroussi M, Djebbi M, Moussa M. Triggering vortex shedding for flow past circular cylinder by acting on initial conditions: A numerical study. Comp Fluids, 2014, 101: 194–20710.1016/j.compfluid.2014.05.034 ↗
21. Williamson C H K. Three-dimensional vortex dynamics in bluff body wakes. Exp Thermal Fluid Sci, 1996, 12: 150–16810.1016/0894-1777(95)00085-2 ↗
22. Lange C F, Durst F, Breuer M. Momentum and heat transfer from cylinders in laminar crossflow at 10−4 Re 200. Int J Heat Mass Transfer, 1998, 41: 3409–343010.1016/S0017-9310(98)00077-5 ↗
23. Stringer R M, Zang J, Hillis A J. Unsteady RANS computations of flow around a circular cylinder for a wide range of Reynolds numbers. Ocean Eng, 2014, 87: 1–910.1016/j.oceaneng.2014.04.017 ↗
24. Koda Y, Lien F S. Aerodynamic effects of the early three-dimensional instabilities in the flow over one and two circular cylinders in tandem predicted by the lattice Boltzmann method. Comp Fluids, 2013, 74: 32–4310.1016/j.compfluid.2013.01.003 ↗
25. Izumi H, Kawata Y, Taniguchi N, et al. Three-dimensional flow analysis around a stationary circular cylinder. Separated Complex Flows, 1995, 217: 167–174