The Effect of Calcium Carbonate (CaCO3) Nanoparticles on the Flow through a Pentagon Spiral Pipe
Corresponding email: yanuar@eng.ui.ac.id
Published at : 27 Dec 2017
Volume : IJtech
Vol 8, No 7 (2017)
DOI : https://doi.org/10.14716/ijtech.v8i7.696
Yanuar., Talahatu, M.A., Mau, S., Waskito, K.T., Wulandari, W., 2017. The Effect of Calcium Carbonate (CaCO3) Nanoparticles on the Flow through a Pentagon Spiral Pipe. International Journal of Technology, Volume 8(7), pp. 1258-1265
| Prof. Dr. Ir. Yanuar, M.Eng., M.Sc. | - Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, 16424, Indonesia - |
| Marcus Alberth Talahatu | Department of Mechanical Engineering Universitas Indonesia |
| Sealtial Mau | Graduate Student Department of Mechanical Engineering Universitas Indonesia |
| Kurniawan Teguh Waskito | Department of Mechanical Engineering Universitas Indonesia |
| Winda Wulandari | Graduate Student Department of Mechanical Engineering Universitas Indonesia |
CaCO3 is friendly to both the environment and humans. For this reason, it is suitable to be applied in fluid transportation to enable more efficient flow. The objective of this study was to investigate the effect of CaCO3 on the flow in a pentagon spiral pipe. The working fluid was circulated into the test pipe with constant pressure by the compressor. The working fluid was produced by mixing pure water with CaCO3 nanoparticles, which have average diameter of 100 nm, in the concentration ratios of 100 ppm, 300 ppm and 500 ppm. The test pipe was a pentagon spiral pipe with the ratio P/Do 7.1, and a circular pipe with a 4 mm inner diameter was used for comparison. The highest drag reduction (DR) that occurred in the spiral pipe was 35% around Re' 4×104 with nanofluids concentration of 500 ppm, while the highest DR in the circular pipe was of 26% around Re’ 4×104. The results show that increasing the percentage of solid particles affects the properties of the working fluid, such as viscosity, density, pressure drop and DR. The effects of the change in fluid properties were also taken into account. These affect the damping phenomena in the near wall region, which gives friction factor reduction. Another benefit of the spiral pipe is that it prevents the sedimentation of nanoparticles.
Calcium carbonate; Drag reduction; Nanofluid; Pentagon spiral pipe; Pressure drop
DR occurring in the pentagon spiral pipe and circular pipe varies depending on the mixture of CaCO3 nanoparticles and the value of Re'. The highest DR that occurs in the spiral pipe is 35% for Re' 4×104 with nanofluid concentration of 500 ppm, while the highest in the circular pipe is 26% at the Re' 4×104. The highest DR value is exhibited in the spiral pipe because it has more turbulent intensity, and the geometry of the spiral pipe generates circumferential flow resulting in the working fluids twisting at a certain Reynolds number. The effect of the change in fluid properties also affects the damping phenomena in the near wall region, which gives effect to friction factor reduction.
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