摘要： Purpose – This paper aims to report the results of numerical analysis of turbulent ?uid ?ow and forced-convection heat transfer in solar air channels with baf?e-type attachments of various shapes. The effect of recon?guring baf?e geometry on the local and average heat transfer coef?cients and pressure drop measurements in the whole domain investigated at constant surface temperature condition along the top and bottom channels’ walls is studied by comparing 15 forms of the baf?e, which are simple (?at rectangular), triangular, trapezoidal, cascaded rectangular-triangular, diamond, arc, corrugated, t, S, V, double V (or W), Z, T, G and epsilon (or e)-shaped, with the Reynolds number changing from 12,000 to 32,000. Design/methodology/approach – The baf?ed channel ?ow model is controlled by the Reynolds-averaged Navier–Stokes equations, besides the k-epsilon (or k-e) turbulence model and the energy equation. The ?nite volume method, by means of commercial computational ?uid dynamics software FLUENT is used in this research work. Findings – Over the range investigated, the Z-shaped baf?e gives a higher thermal enhancement factor than with simple, triangular, trapezoidal, cascaded rectangular-triangular, diamond, arc, corrugated, t, S, V, W, T, G and e-shaped baf?es by about 3.569-20.809; 3.696-20.127; 3.916-20.498; 1.834-12.154; 1.758-12.107; 7.272-23.333; 6.509-22.965; 8.917-26.463; 8.257-23.759; 5.513-18.960; 8.331-27.016; 7.520-26.592; 6.452-24.324; and 0.637-17.139 per cent, respectively. Thus, the baf?e of Z-geometry is considered as the best modern model of obstacles to signi?cantly improve the dynamic and thermal performance of the turbulent air?ow within the solar channel. Originality/value – This analysis reports an interesting strategy to enhance thermal transfer in solar air channels by use of attachments with various shapes