%0 Journal Article %J International Journal of Heat and Mass Transfer %D 2006 %T Characterization of the Temperature Oscillation Technique to Measure the Thermal Conductivity of Fluids %A Prajesh Bhattacharya %A S. Nara %A P. Vijayan %A Tang, T. %A W. Lai %A Patrick E. Phelan %A Ravi S. Prasher %A David W. Song %A J. Wang %K Temperature oscillation technique %K Thermal conductivity %K thermal diffusivity %X

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.

%B International Journal of Heat and Mass Transfer %V 49 %P 2950-2956 %8 08/2006 %G eng %U http://www.sciencedirect.com/science/article/pii/S001793100600144X %N 17-18 %& 2950 %0 Journal Article %J International Journal of Heat and Mass Transfer %D 2006 %T Characterization of the Temperature Oscillation Technique to Measure the Thermal Conductivity of Fluids %A Prajesh Bhattacharya %A S. Nara %A P. Vijayan %A Tang, T. %A W. Lai %A Patrick E. Phelan %A Ravi S. Prasher %A David W. Song %A J. Wang %K Temperature oscillation technique %K Thermal conductivity %K thermal diffusivity %X

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.

%B International Journal of Heat and Mass Transfer %V 49 %P 2950-2956 %8 08/2006 %G eng %U http://www.sciencedirect.com/science/article/pii/S001793100600144X %N 17-18 %& 2950 %0 Conference Paper %B Heat Transfer Conference %D 2005 %T Effect of Particle Material on the Static Thermal Conductivity of Nanofluids %A P. Vijayan %A Prajesh Bhattacharya %A S. Nara %A W. Lai %A Patrick E. Phelan %A Ravi S. Prasher %A David W. Song %A J. Wang %B Heat Transfer Conference %C San Francisco, CA %8 07/2005 %G eng %0 Conference Paper %B International Mechanical Engineering Congress & Exposition, %D 2004 %T Evaluation of the Temperature Oscillation Technique to Calculate Thermal Conductivity of Water and Systematic Measurement of the Thermal Conductivity of Aluminum Oxide – Water Nanofluiids %A Prajesh Bhattacharya %A P. Vijayan %A Tang, T. %A S. Nara %A Patrick E. Phelan %A Ravi S. Prasher %A J. Wang %A David W. Song %B International Mechanical Engineering Congress & Exposition, %C Anaheim, CA %8 11/2004 %G eng