Natural Convection from the Concave Wall in a Square Enclosure

오목벽면이 있는 밀폐공간에서 자연대류

  • 박태선 (한국항공우주연구원 로켓엔진연구그룹)
  • Published : 2002.03.01

Abstract

The effect of concave curvature on the natural convection has been numerically studied using the higher-order finite difference method. The heating wall in a enclosure is approximated by a cosine function. The heat transfer coefficient is analyzed for three Rayleigh numbers and five amplitudes. For Ra = 10/sup 8/ the separation and reattachment are observed on the adiabatic walls. The wall heat transfer are slightly changed by the increasing curvatures.

Keywords

References

  1. Xin, S. and Le Quere, P., 'Direct Numerical Simulations of Two-Dimensional Chaotic Natural Convection in a Differentially Heated Cavity of Aspect Ratio 4' J. Fluid Mech, 304 (1995), p.87-118
  2. Watson,, A. and Poots, G., 'The Effect of Sinusoidal Protrusions on Laminar Free Convection Between Vertical Walls," J.Fluid Mech, 49 (1971), p.33-48
  3. Murthy, P.V.S.N., Rathish Kumar, B.V. and Singh, P., 'Natural Convection Heat Transfer from a Horizontal Wavy Surface in a Porous Enclosure,' Numerical Heat Transfer. A, 31 (1997), p.207-221
  4. Rathish Kumar, B.V., Murthy, P.V.S.N. and Singh, P., 'Free Convection Heat Transfer from an Isothermal Wavy Surface in a Porous Enclosure, Int. J. Num. Meth Ftuids., 28 (1998), p.633-661
  5. Lele, S.K., 'Compact Finite DifferenceSchemes with Spectral-like Resolution,' J. Computationat Phys., 103 (1992), p. 16-42
  6. Morinishi, Y., 'Conservative Properties of Finite Difference Schemes forIncompressible Flow,' AnnuaI ResearchBriefs-1995, CTR, NASA Ames/Stanford Univ., p.121-132
  7. Choi, H. and Moin, P., 'Direct Numehcal Simulation of Turbulent Flow over Riblets,' J. Fluid Mech, 255 (1993), p.503
  8. Demirdzic, I., Lilek, Z. and Peric, M., 'FluidPlow and Heat Transfer Test Problems for Non-Orthogonal Grids: Bench-Mark Solutions,' I. J. Numericat Methods in Ftuids, 15 (1992), p.329-354
  9. Kwak, H.S. and Hyun, J.M., 'Natural Convection in an Enclosure Having a Vertical Sidewall with Time-VaryingTemperature,' J. Ftuid Mech, 329 (1996), p.65-88
  10. Ravi, M.R., Henkes, R.A.W.M. and Hoogendoom, C.J., 'On theHigh-Rayleigh-Number Structure of Steady laminar Natural-Convection Flow in a Square Enclosure,' J. Fluid Mech, 262 (1994), p.325-351
  11. Patterson, J. and Imberger, J., 'Unsteady Natural Convection in a Rectangular Cavity,' J. FIuid Mech, 100 (1980), P.65-86
  12. CFD-ACECorporation ver.5.0, CFD Research