Comments on “The Apparent Thermal Conductivity of Liquids Containing Solid Particles of Nanometer Dimensions: A Critique” (Int. J. Thermophys. 36, 1367 (2015))

Rutin, Sergey B.; Скрипов, П. В.

doi:10.1007/s10765-016-2108-3

Cited by 13 publications

(2 citation statements)

References 16 publications

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“…Consequently, it will reflect the difference in the coefficien transfer from the probe to the sample at a selected (generally, arbitrary) timing. ing [20], the condition for the transition from measurements on pure compon measurements on solutions will be the repeatability of the heating function in a experiments and the sensitivity of the response signal to a small change in the par see Figure 3. The latter circumstance makes it appropriate to use the heating mode in the form of constant current in the probe circuit, I(t) ≈ const.…”

Section: Methodsmentioning

confidence: 99%

Investigation of Binary Liquids in Unstable States—An Experimental Approach

Igolnikov

Rutin

Скрипов

2021

Liquids

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In this article, we present a methodology for conducting measurements based on pulse heating of a wire probe in partially soluble binary liquids. These liquids, which can be rapidly transferred to the region of unstable states above the diffusional spinodal, are novel research objects for the thermophysics of extreme states. Using the example of aqueous solutions of polypropylene glycol and glycol monobutyl ether having a lower critical solution temperature, the key hypothesis of the study on the general measurability of the properties of unstable solutions has been confirmed. The characteristic heating times from 1 to 15 milliseconds corresponded to the thickness of the heated layer comprising a few micrometers. The pressure was varied from units of MPa to 100 MPa. The conditions for the transition from measurements on pure components to those on solutions are formulated. The characteristic thermal patterns of the decay of unstable states depending on pressure and heating rate are revealed. The general possibility of using partially soluble binary liquids as a promising coolant in processes involving powerful local heat release is demonstrated.

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Section: Methodsmentioning

confidence: 99%

Investigation of Binary Liquids in Unstable States—An Experimental Approach

Igolnikov

Rutin

Скрипов

2021

Liquids

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“…It also changes its bulk concentration, distorting the propagation of the heating wave, making the sensing zone non-homogeneous, and originating a temperature discontinuity like the temperature jump in gases. A hot wire-nanofluid interface thermal conductance (sometimes referred to as the Kapitza resistance) needs to be measured, and this fact can be detected experimentally, as explained by Rutin and Skripov, 2017 [37] and Hasselman, 2018 [38]. Recent work in ionanofluids of graphene and carbon nanotubes in our group, using molecular simulation, showed that not only this interphase exists, but also that it has a finite value of thermal conductivity, of the order of 15-30% that of the bulk ionic liquid [39].…”

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confidence: 99%

Towards the Correct Measurement of Thermal Conductivity of Ionic Melts and Nanofluids

Castro

Lourenço

2019

Energies

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Thermophysical properties of engineering fluids have proven in the past to be essential for the design of physical and chemical processing and reaction equipment in the chemical, metallurgical, and allied industries, as they influence directly the design parameters and performance of plant units in the of, for example, heat exchangers, distillation columns, phase separation, and reactors. In the energy field, the search for the optimization of existing and alternative fuels, either using neutral or ionic fluids, is an actual research and application topic, both for new applications and the sustainable development of old technologies. One of the most important drawbacks in the industrial use of thermophysical property data is the common discrepancies in available data, measured with different methods, different samples, and questionable quality assessment. Measuring accurately the thermal conductivity of fluids has been a very successful task since the late 1970s due to the efforts of several schools in Europe, Japan, and the United States. However, the application of the most accurate techniques to several systems with technological importance, like ionic liquids, nanofluids, and molten salts, has not been made in the last ten years in a correct fashion, generating highly inaccurate data, which do not reflect the real physical situation. It is the purpose of this paper to review critically the best available techniques for the measurement of thermal conductivity of fluids, with special emphasis on transient methods and their application to ionic liquids, nanofluids, and molten salts.

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Features of Supercritical Heat Transfer at Short Times and Small Sizes

Скрипов

Rutin

2021

Int J Thermophys

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Comments on “The Apparent Thermal Conductivity of Liquids Containing Solid Particles of Nanometer Dimensions: A Critique” (Int. J. Thermophys. 36, 1367 (2015))

Cited by 13 publications

References 16 publications

Investigation of Binary Liquids in Unstable States—An Experimental Approach

Investigation of Binary Liquids in Unstable States—An Experimental Approach

Towards the Correct Measurement of Thermal Conductivity of Ionic Melts and Nanofluids

Features of Supercritical Heat Transfer at Short Times and Small Sizes

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