대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제25권11호
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  • Pages.1467-1475
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  • 2001
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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능동적 벽 운동을 수반하는 난류유동의 해석을 위한 근사 좌표변환

Approximate Coordinate Transformations for Simulation of Turbulent Flows with Active Wall Motions

  • 발행 : 2001.11.01
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초록

In the present paper, approximate coordinate transformations for simulation of turbulent flows with active wall motions, leading to a significant reduction in the computational cost while maintaining the numerical accuracy, are presented: the Navier-Stokes equations are coordinate-transformed with an approximation of Taylor-series truncation and neglect of some less-significant terms. The performance of the proposed transformations is evaluated in simulation of the channel flow at Re$\sub$$\tau$/=140 with wall deformations of │η$\sub$m/$\^$+/ 5. The approximate transformations provide flow structures as wall as turbulence statistics in good agreement with those from a complete coordinate transformation [Phys. Fluids 12, 3301 (2000)] and allow 25-30% savings in the CPU time as compared to the complete one.

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참고문헌

  1. Gad-el-Hak, M., 1996, 'Modem Developments in Flow Control,' Appl. Mech. Rev., 49, pp. 65 - 379
  2. Carlson, H.A. and Lumley, J.L., 1996, 'Active Control in the Turbulent Wall Layer of a Minimal Flow Unit,' J. Fluid Mech., 329, pp. 341-371 https://doi.org/10.1017/S0022112096008944
  3. Mito, Y. and Kasagi, N., 1998, 'DNS Study of Turbulence Modification with Streamwise-Uniform Sinusoidal Wall-Oscillation,' Int. J. Heat Fluid Flow, 19, pp. 470-481 https://doi.org/10.1016/S0142-727X(98)10025-5
  4. Endo, T., Kasagi, N., and Suzuki, Y., 2000, 'Feedback Control of Wall Turbulence with Wall Deformation,' Int. J. Heat Fluid Flow, 21, pp. 568 - 575 https://doi.org/10.1016/S0142-727X(00)00046-1
  5. Kang, S. and Choi, H., 2000, 'Active Wall Motions for Skin-Friction Drag Reduction,' Phys. Fluids, 12, p. 3301 https://doi.org/10.1063/1.1320833
  6. Choi, H., Main, P., and Kim, J., 1994, 'Active Turbulence Control for Drag Reduction In Wall-Bounded Flows,' J. Fluid Mech., 262, pp. 75-110 https://doi.org/10.1017/S0022112094000431
  7. Lee, C., Kim, J., and Choi, H., 1998, 'Suboptimal Control of Turbulent Channel Flow for Drag Reduction,' J Fluid Mech., 358, pp. 245-258 https://doi.org/10.1017/S002211209700815X