Effect of orientation on laminar natural convection from a heated square cylinder in power-law liquids

► Inclination of a square cylinder enhances heat transfer by free convection. ► Shear-thinning behaviour promotes heat transfer. ► Nusselt number is stronger dependence on the Grashof number than that on the Prandtl number. ► Flow remains attached in shear-thickening fluid in the range of conditions studied.