Empirical Correlations(Contd Vertical Plate(Contd Alternative applicable to entire Rayleigh number range(for constant Ts) 0.387Ra16 E 0.825+ 9/68/27 9.26 +(0.492/Pr) Vertical cylinders Use same correlations for vertical flat plate f D≈35 ≥ 1/4 L Inclined plate 7 See figure 9.7 d Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 4 Empirical Correlations (Cont’d) Vertical Plate (Cont’d) • Alternative applicable to entire Rayleigh number range (for constant Ts) Vertical Cylinders • Use same correlations for vertical flat plate if: Inclined Plate   2 8/ 27 9/16 1/ 6 1 (0.492/ Pr) 0.387 0.825         + = + L L Ra Nu 1/ 4 ~ 35 GrL L D  Eq 9.26 See Figure 9.7