Internal convection heat transfer coefficient (summary) 1.For laminar and fully developed flow (S 8.4.1): i.g"constant: Wup=4.36 Eq.8.53 ii.Ts constant: Wup=3.36 Eq.8.55 2.For laminar flow in entry region(before fully developed flow,§8.4.2： i.Ts constant 0.0668 Rep Pr WuD=3.66+- 213 Eq.8.56 1+004 ReoP ii.Combined entry length with full tube: ,1R 0.14 Eq.8.57 3.For turbulent and fully developed (S 8.5) i.Heating Nup =0.023Res Pr04 Eq.8.60 ii.Cooling No=0.023Re5Pr03 All fluid properties evaluated at the mean T Tm =(Tmi+Tmo)/2 Heat Transfer #8 Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 8 Internal convection heat transfer coefficient (summary) 1. For laminar and fully developed flow (§8.4.1): i. q ” constant: ii. Ts constant: 2. For laminar flow in entry region (before fully developed flow, §8.4.2: i. Ts constant : ii. Combined entry length with full tube: 3. For turbulent and fully developed (§8.5) i. Heating ii. Cooling 2/3 Re Pr L D 1 0.04 Re Pr L D 0.0668 3.66                      D D NuD 1/3 0.14 / Re Pr 1.86              s D D L D Nu   All fluid properties evaluated at the mean T  / 2 Tm  Tm,i Tm,o Eq. 8.53 Eq. 8.55 Eq. 8.56 Eq. 8.57 Eq. 8.60 4/5 0.4 0.023Re Pr NuD  D 4/5 0.3 0.023Re Pr NuD  D NuD  4.36 NuD  3.36