Abstract
Numerical solutions are presented for laminar combined forced and free convection heat transfer between finite vertical heated parallel plates. Boundary layer equations are transformed into dimensionless form by introducing the dimensionless variables, and it is found that mean Nusselt number Nu_m is considered to be a function of modified Peclet number Pe^* and parameter Gr^*/Re^<*2>. A finite difference numerical method is adopted to solve these equations. Paticular attentions are given to heat transfer results, which cover a wide range of modified Peclet number Pe^* and parameter Gr^*/Re^<*2>. For combined convection the heat transfer results are related to following equations. (1)Fully developed temperature field (Pe^*≦1.5) Nu_m=1/2Pe^* (2)For U_1=1(Uniform)and P_1=0 Nu_m=1/2Pe^*[1-esp{-(C_1/(Pe^*))^<C_2>}]^C_3×[1-exp(-C_4/(Pe^*))]^<-0.245> where, C_1=(4.5+0.012 B)^<4/3>, C_2=1-0.002 B, C_3=3/4(1-0.002 B)^<-1> C_4=[(2.25+0.006 B)/(0.76+0.106 B^<0.821>{1-exp(-3.37/B)}^0.41]^<1/0.245> B=(Gr^*)/(Re^<*2>) (0.1≦Pe^*≦2×10^4, 0≦(Gr^*)/(Re^<:2>)≦50
