17 June 2009 Measurement of temperature, refractive index, density distribution, and convective heat transfer coefficient around a vertical wire by the Michelson interferometer
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Abstract
In this paper it is shown that temperature, refractive index and density and also convective heat transfer coefficient around a vertical axisymmetric cylindrical wire can be measured by the Michelson Interferometer. In experimental setup, a vertical wire has been put in one of the arms of the Michelson Interferometer. By applying voltage to the wire, temperature gradient is created around the wire. These phenomena curved the linear Michelson fringes. By measuring the fringes shift and applying the Abel transform, the distribution of refractive index can be evaluated. This distribution gives the density distribution. Minimum value for refractive index and density is found on the surface of the wire. For the far distance from the wire, density and refractive index approaches to the room values. Air density was evaluated experimentally, which is compatible with its reported value at definite weather conditions. Considering high reflectance of the wire, its thermal radiation is low and heat mostly transfers by convection. Convective heat transfer coefficient is measured experimentally which agrees with last results.
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K. Madanipour, K. Madanipour, S. Fatehi, S. Fatehi, P. Parvin, P. Parvin, } "Measurement of temperature, refractive index, density distribution, and convective heat transfer coefficient around a vertical wire by the Michelson interferometer", Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 73892X (17 June 2009); doi: 10.1117/12.827512; https://doi.org/10.1117/12.827512
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