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A Finite-Element Flash Method for Measuring Thermal Conductivity of Liquid

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Mamczur J., Wasilewski A., Więcek T.
Acta Physica Polonica A
|
2015
|
vol. 128
|
issue 2
193-195
EN
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.
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