Thermal field visualization of nanofluids using full-field interferometry. (July 2015)

• Record Type: Journal Article
• Authors: Yousefi, T.; Farahbakhsh, B.; Naylor, D.; Saghir, M.Z.
• Is Part Of: International communications in heat and mass transfer. Volume 65(2015:Jul.)
• Page Start: 125
• Page End: 129
• Publication Date: 2015-07
• Subjects: Mach–Zehnder interferometry -- Nanofluid visualization; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Heat -- Transmission; Mass transfer; Periodicals; 621.4022
• DOI: 10.1016/j.icheatmasstransfer.2015.05.001
• Languages: English
• ISSNs: 0735-1933

Abstract

Abstract: This paper reports the visualization of the temperature field in light-transmitting nanofluids using a Mach–Zehnder interferometer. In this study, the evolution of the free convective temperature fields around a resistively heated vertical metal strip was observed in two nanofluids. Visualization has been obtained using a 15 mW He-Ne laser (632.8 nm) for SiO2 –water and Al2 O3 –water nanofluids over a range of concentrations. The optical path length of the test beam through the nanofluid was 7 mm. The results show that a SiO2 –water nanofluid can be used up to a concentration of at least 40% by weight. Al2 O3 –water nanofluid can be used up to at least 1% concentration by weight, provided the solution is adequately homogenized. This work demonstrates that optical temperature field and the local heat flux measurements are technically feasible in these nanofluids.