FIELD: thermophysical measurements.
SUBSTANCE: invention relates can be used to determine the thermophysical properties of liquids, gel and pasty mixtures. Thermophysical characteristics (TPC) of liquids are important in many natural and technological processes where they promote heat transfer. A method for measuring the thermal conductivity of liquids is claimed, according to which the temperature of the heat source and the medium under study is measured, and the measurement is done with a thermal probe, which is a metal rod containing thermocouples and an electric heater to create a heat flow with a hemisphere at the end, which is immersed in the liquid for the duration of the measurement. Moreover, before the measurement, the rod is heated to an equilibrium state, and then brought into contact with the test liquid, and after reaching a new equilibrium state, temperatures T1 and T2 are recorded in the section of the rod of known length 
and the thermal conductivity of the liquid is calculated based on measurements of the heat flux in the rod and the temperature difference between the hemisphere of radius R immersed in the liquid and the initial temperature of the liquid under study. Average measurement error λ by the thermal probe method is ± 0.02 W/(m K), and the deviation from the reference data and the well-known time-consuming method of slow monotonous heating in a flat layer does not exceed 10%.
EFFECT: increased measurement accuracy and reduced duration of the measurement.
2 cl, 2 dwg
