Abstract
AbstractIt is known that ultrasonication has a certain effect on thermophysical properties and heat transfer of nanofluids. The present study is the continuation of the authors’ previous research on the effects of ultrasonication on the thermophysical properties of Multi-Walled Carbon Nanotubes (MWCNTs)-water nanofluid. Investigating the effects of ultrasonication time on samples’ stability, rheological properties, and pumping power of a water-based nanofluid containing MWCNTs nanoparticle is the main objective of the present study. The two-step method has been employed to prepared the samples. Moreover, a probe-type ultrasonic device has been used, and different ultrasonication times have been applied. The samples’ stability is investigated in different periods. The results revealed that prolonging the ultrasonication time to 60 min leads to improving the samples’ stability while prolonging ultrasonication time to higher than 60 min resulted in deteriorating the stability. As for dynamic viscosity, it is observed that increasing ultrasonication time to 60 min leads to decreasing the dynamic viscosity of the samples. As for pumping power, it is observed that the maximum increase in fanning friction factor ratio is less than 3%, which shows that adding MWCNTs to water does not impose a considerable penalty in the required energy for pumping power.
Publisher
Springer Science and Business Media LLC
Reference55 articles.
1. Choi J. A., S.U.S.; Eastman. Enhancing thermal conductivity of fluids with nanoparticles, ASME FED, 231: 99–103. In International Mechanical Engineering Congress and Exhibition, San Francisco, CA (United States) (1995).
2. Asadi, M., Asadi, A. & Aberoumand, S. An experimental and theoretical investigation on the effects of adding hybrid nanoparticles on heat transfer efficiency and pumping power of an oil-based nanofluid as a coolant fluid. Int. J. Refrig. 89, 83–92 (2018).
3. Alarifi, I. M., Alkouh, A. B., Ali, V., Nguyen, H. M. & Asadi, A. On the rheological properties of MWCNT-TiO2/oil hybrid nanofluid: an experimental investigation on the effects of shear rate, temperature, and solid concentration of nanoparticles. Powder Technol. 355, 157–162 (2019).
4. Hemmat Esfe, M., Saedodin, S., Asadi, A. & Karimipour, A. Thermal conductivity and viscosity of Mg(OH)2-ethylene glycol nanofluids. J. Thermal Anal. Calorimetry 120(2), 1145–1149 (2015).
5. Pourfattah, F., Abbasian Arani, A. A., Babaie, M. R., Nguyen, H. M. & Asadi, A. On the thermal characteristics of a manifold microchannel heat sink subjected to nanofluid using two-phase flow simulation. Int. J. Heat Mass Transf. 143, 118518 (2019).
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