Fig. 12From: Experimental Study on the Flow and Heat Transfer Characteristics of TiO2-Water Nanofluids in a Spirally Fluted TubeFrictional resistance coefficients and pressure drop in the smooth tube. Frictional resistance coefficients and pressure drop of the smooth tube filled with nanofluids. Frictional resistance coefficients: a laminar flow and b turbulent flow; pressure drop: c laminar flow and d turbulent flowBack to article page