Figure 1 Flow configuration and coordinates system
Related Figures (12)
Using equation (14), the skin friction at the walls in the dimensionless form is given as Transient natural convection flow between vertical parallel plates ‘Itis also interesting to study the rate of heat transfer at the isothermal wall, which is expressed as Nusselt number The steady-state solutions for velocity and tem- perature fields are derived by taking a()/dt =0 in equations (4) and (5), which then reduces to number Pr are chosen to be 0.71, 2.0, and 7.0, which correspond to air, sulphur dioxide, and water, respec- tively. Numerical values of equations (14) to (17) are obtained by truncating the infinite series when the absolute value of the last term is less than 10~°. Fig.2 Temperature profiles for different values of t (Pr = 0.71) Fig.4 Velocity profiles for different values of f¢ (Pr = 0.71) Fig.5 Velocity profiles for different values of t and Pr Fig.6 Skin friction at isothermal boundary (y = 1.0) Transient natural convection flow between vertical parallel plates Fig.7 Skin friction at adiabatic boundary (y = 0.0) Fig.8 Rate of heat transfer at isothermal boundary (y = 1.0) The rate of heat transfer, which is expressed as Nus- selt number (Nu) at the isothermal wall, is shown in Fig. 8. It is reflected from this figure that the rate of heat transfer is directly proportional to the Prandtl number. This is physically true because fluid with high
