Thermal conductivity of fluids measured with 3ω method
Yunfei Chen · 2007
While successfully used in measuring the thermal properties of solid material,such as bulk samples and thin films,3ω method is seldom applied to the fluid.Due to its good performance,the 3ω method is tried to measure the thermal conductivity of the fluid in this paper.Using the home made device,the relationship between the 3ω voltage and the heating frequency is obtained by Lock-in Amplifier,thus the thermal conductivity of the fluid is calculated with the least square fit method.From the results of 10# transformer oil and deionized water,the error is limited to 5%,which indicates the definite feasibility of the experiment.