A Finite-Element Flash Method for Measuring Thermal Conductivity of Liquid
J.A. Mamczur, A. Wasilewski and T. Więcek
Rzeszów University of Technology, al. Powstanców Warszawy 12, Rzeszów, Poland
Full Text PDF
A laser beam is used to heat a portion of liquid closed in a vessel from the top of it to avoid convection. The temperature is measured at the bottom of the vessel by a laser waveguide sensor. The heating and measuring methods allow using a small amount of liquid of the order of a milliliter fraction. The heat flow through the liquid as well as the surrounding vessel and space is modeled by the finite-element method to calculate the temperature at the bottom vs. time. Thus obtained dependence is used then as a fitting function to get the liquid thermal conductivity among some other fitting parameters.

DOI: 10.12693/APhysPolA.128.193
PACS numbers: 44.05.+e, 44.10.+i, 07.05.Tp, 02.70.Dh, 02.60.Ed