o Surface thermal conditions are commonly idealized as being of uniform temperature T or uniform heat flux Thermal boundary layer development may be delayed by an unheated starting length. Ts=To Ts>T x=L X Equivalent surface and free stream temperatures forx< and uniform T (or g forx>.• Surface thermal conditions are commonly idealized as being of uniform temperature or uniform heat flux . Ts s q′′ • Thermal boundary layer development may be delayed by an unheated starting length. Equivalent surface and free stream temperatures for and uniform (or ) for x < ξ Ts s q′′ x > ξ