Effect of surface tension on SiO2 -methanol nanofluids. Issue 1 (September 2015)

• Record Type: Journal Article
• Authors: Bhuiyan, M H U; Saidur, R; Amalina, M A; Mostafizur, R M
• Is Part Of: IOP conference series. Volume 88:Issue 1(2015)
• Publication Date: 2015-09
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/88/1/012056
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: Surface tension, the cohesive energy of an interface dominated the transportation behaviour of the liquids play an important role in the heat transfer performance. A new class of heat transfer fluid denoting "Nanofluids" with impressive thermo-physical properties, proved its promising potentiality in the heat transfer performance. However, very few numbers of studies observed for the effect of nanoparticles on the surface tension of liquids, also noted controversial results. In the present study, SiO2 nanoparticles dispersed in methanol solution to investigate the effect of surface tension with the change of concentration and their sizes. The most common Du-Nouy ring method was used to measure the surface tension of methanol based nanofluids by an automatic surface tensiometer.The results denote that the surface tension of the nanofluids increases with increase in concentration. On the other hand, the results indicate that the surface tension decreases with the increase in temperatures. Besides, the surface tension of SiO2-methanol nanofluids enhances compared to pure methanol. All in all, the enhancement observed 1.7% to 8.9% of the variation of volume fractions (0.05 Vol % to 0.25 Vol %) and the temperature change of 25 °C to 50 °C.