TY - JOUR
TI - Impact of coil pitch on heat transfer enhancement of a turbulent flow of α-Al2O3/DW nanofluid through helical coils
AU - Abdullah Mustafa S
AU - Hussein Adnan M
JN - Thermal Science
PY - 2023
VL - 27
IS - 6
SP - 5005
EP - 5014
PT - Article
AB - The current study experimentally examines the impact of coil pitch on heat  transfer behavior and friction factor through helical coils for α-  Al2O3/Distilled water nanofluid turbulent flow. These tests were conducted  on coils with coil pitches of 20, 35, and 50 mm. The nanoparticle volume  fraction was 0.1%. The nanoparticles in a 0.1% volume concentration of  nanofluid increased the heat transfer rate and friction factor compared to  those of distilled water. Increases in coil pitch also resulted in greater  heat transfer efficiency. A correlation between the Reynolds number, the  Prandtl number, and the curvature ratio of the coil was also shown to be  connected to the Nusselt numbers for the flow of nanofluids within the  coils.