Surface tension profiles of nanofluid containing surfactant during microwave irradiation
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© Published under licence by IOP Publishing Ltd. Manipulation of the surface tension is useful in improving heat and mass transfer performances of nanofluids in thermal systems. In our previous study, the effect of microwave irradiation on the reduction of surface tension of nanofluids (Fe 2 O 3 ) was found even after it was turned off. In this study, a synergistic effect of microwave irradiation and surfactant addition (SDS) was investigated to obtain further surface tension reduction of nanofluid. Experimental results indicate that surfactant addition is effective for wider particle number density in reducing surface tension, and the reduction level strongly depends on the surfactant concentration. On the other hand, effect of the number density on the surface tension reduction is less significant for the same concentration of surfactant. From the obtained data, a combination of microwave irradiation and surfactant addition shows potential to be used as a promising method to manipulate surface tension of nanofluids.
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Saptoro, Agus; Kanazawa, Y.; Asada, M.; Asakuma, Y.; Phan, C. (2016)Manipulation of the surface tension is one of the key pathways to enhance heat and mass transfer performances of nanofluids in thermal systems. Current practices and existing literature on the surface tension reduction ...
Asada, M.; Kanazawa, Y.; Asakuma, Y.; Honda, I.; Phan, Chi (2015)© 2015 The Institution of Chemical Engineers. Surface tension of fluids is an important factor controlling multiphase systems and is often manipulated by surfactants during industrial processes. Previously, we have found ...
Asakuma, Y.; Nakata, R.; Asada, M.; Kanazawa, Y.; Phan, Chi (2016)© 2016 Elsevier LtdWater behavior during and after microwave irradiation is important phenomena for industrial applications. Recently, we reported a non-thermal effect of microwave on water surface tension. The bubble ...