TY - JOUR T1 - Characterization of the Temperature Oscillation Technique to Measure the Thermal Conductivity of Fluids JF - International Journal of Heat and Mass Transfer Y1 - 2006 A1 - Prajesh Bhattacharya A1 - S. Nara A1 - P. Vijayan A1 - Tang, T. A1 - W. Lai A1 - Patrick E. Phelan A1 - Ravi S. Prasher A1 - David W. Song A1 - J. Wang KW - Temperature oscillation technique KW - Thermal conductivity KW - thermal diffusivity AB -

The temperature oscillation technique to measure the thermal diffusivity of a fluid consists of filling a cylindrical volume with the fluid, applying an oscillating temperature boundary condition at the two ends of the cylinder, measuring the amplitude and phase of the temperature oscillation at any point inside the cylinder, and finally calculating the fluid thermal diffusivity from the amplitude and phase values of the temperature oscillations at the ends and at the point inside the cylinder. Although this experimental technique was introduced by Santucci and co-workers nearly two decades ago, its application is still limited, perhaps because of the perceived difficulties in obtaining accurate results. Here, we attempt to clarify this approach by first estimating the maximum size of the liquid’s cylindrical volume, performing a systematic series of experiments to find the allowable amplitude and frequency of the imposed temperature oscillations, and then validating our experimental setup and the characterization method by measuring the thermal conductivity of pure water at different temperatures and comparing our results with previously published work.

VL - 49 UR - http://www.sciencedirect.com/science/article/pii/S001793100600144X IS - 17-18 ER -