A spatially periodic flow and heat transfer in a rectangular channel with one ribbed wall

The systematic data on the effect of ribbing on the parameters of a relative (in comparison with a smooth channel) increase in hydraulic resistance ε_p and heat transfer ε_q in the range of Reynolds numbers from 50 to 8∙10⁶ has been obtained by numerical modeling of a developed spatially periodic flow and stabilized heat transfer of incompressible gas with a Prandtl number of 0.7 in a rectangular channel with one-sided internal ribbing. In the laminar regime, the ε_q value was found to be small and amounted about 10%, and ε_p value exceeding 2.5. In the turbulent regime, the ε_q value behaved nonmonotonic depending on the Reynolds number, the range of its variation was 1.5–2.6, while ε_p increased from 3.5 to 7.0.