المجلة الدولية للعلوم والتقنية

In this study, numerical estimations of local Nusselt number along flat plate are examined. ANSYS CFD software was used to construct, solve and present problem. Two types of convective heat transfer simulations were carried out namely, laminar and turbulent flow over an isothermal plate and laminar and turbulent flow over plate at constant heat flux. A CFD model was adopted to simulate convection in air, CO2 and water vapor. The boundary-layer thickness was used for laminar and turbulent 2 cm and 3.4 cm respectively. The results showed that the local Nusselt number differed by 1.03 % for laminar flow and 4.44 % for turbulent flow from published data for isothermal plate simulations, as for constant heat flux simulations the local Nusselt number differed from published data by 1.84 % for laminar flow, and 5.5 % for turbulent flow. The result also tells us that the boundary-layer thickness for laminar and turbulent flow increase with distance from the leading edge of the flat plate. The results were in very good agreement with the published data for correlation equation of local Nusselt number. Keywords: correlation equation, isothermal plate, constant heat flux, laminar & turbulent flow.