1. The problem statement, all variables and given/known data Consider a flat plate subject to parrallel flow (top and bottom) characterized by u∞ = 5 m/s and T∞ = 20°C. Determine the average convection heat transfer coefficient and convective heat transfer rate with an L = 2m long and w = 2m wide flat plate for airflow and surface temp Ts = 50°C 2. Relevant equations ReL = V*L/v h = Nu*k/L 3. The attempt at a solution My question is what should the L be to calculate the Reynold's number and conventive coefficient. Is it 2m or 4m since fluid flows over the top and bottom?