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  1. No Access

    Article

    Application of Laser Scannung Thermography and Regression Analysis to Determine Characteristics of Defects in Polymer Composite Materials

    The method of laser point scanning thermography is highly sensitive and allows for reliable detection of surface and subsurface defects in products made of polymer composite materials. When implementing this m...

    A. G. Divin, S. V. Ponomarev, S. V. Mishchenko… in Russian Journal of Nondestructive Testing (2024)

  2. No Access

    Article

    Measurement of the Thermal Diffusivity of Optical Materials and Products by a New Thermographic Express Method That Does Not Require Cutting Samples Out of the Bulk

    Thermal diffusivity a and thermal conductivity λ are important parameters for many structural and functional material applications. These parameters determine the intensity of heat transfer, the quality of the...

    Yu. I. Golovin, A. A. Samodurov, D. Yu. Golovin, A. I. Tyurin… in Measurement Techniques (2023)

  3. No Access

    Article

    New Measurement Method of Thermal Conductivity of Fluids

    The paper proposes the new express method for the measurement of thermal conductivity of fluids, gels, and pastes using a measuring rod, one end of which is a hemispherical tip immersed in a fluid, and another...

    D. Yu. Golovin, A. A. Samodurov, A. I. Tyurin, A. G. Divin… in Russian Physics Journal (2023)

  4. No Access

    Article

    Development of the Method of Nondestructive Control of the Diffusion Coefficient in Massive Products from Porous Materials

    Consideration is given to the modernization of a pulse method of nondestructive control of the diffusion coefficient with the aim of improving the accuracy of its use to investigate massive products from porou...

    V. P. Belyaev, A. G. Divin, P. S. Belyaev in Journal of Engineering Physics and Thermop… (2022)

  5. No Access

    Article

    A New Rapid Method of Determining the Thermal Diffusivity of Materials and Finished Articles

    A new nonstationary nondestructive rapid method of determining the thermal diffusivity of materials and finished articles has been suggested and tested experimentally without cutting out samples from them and ...

    D. Yu. Golovin, A. G. Divin, A. A. Samodurov… in Journal of Engineering Physics and Thermop… (2020)

  6. No Access

    Article

    Determination of the Thermal Diffusivity of Materials by a Nondestructive Express Method with the Use of Step-By-Step Local Heating of the Surface and High-Speed Thermography

    We propose an express method for measuring the thermal diffusivity of the materials of products that does not require cutting out of the samples of special shapes from the homogeneous mass of the product. The ...

    D. Yu. Golovin, A. G. Divin, A. A. Samodurov, A. I. Tyurin… in Measurement Techniques (2019)

  7. No Access

    Article

    New Express Method for Measuring the Thermal Diffusivity of Non-Metallic Materials on an Example of Zirconium Ceramics

    D. Yu. Golovin, A. I. Tyurin, A. A. Samodurov, A. G. Divin… in Russian Physics Journal (2019)

  8. No Access

    Article

    Minimization of Measurement Errors of the Coefficients of Heat Conductivity and Thermal Diffusivity of Thermal Insulating Materials by the Plane Pulsed Heat Source Method

    Mathematical models have been developed for the calculation of measurement errors of the coefficients of the heat conductivity and thermal diffusivity of thermal insulating materials. A technique for selection...

    S. V. Ponomarev, E. V. Bulanov, V. O. Bulanova, A. G. Divin in Measurement Techniques (2019)

  9. No Access

    Article

    Optimization of Measurements of the Thermophysical Parameters of Heat-Insulating Materials by Means of a Linear Pulse Heat Source

    A mathematical model for use in calculating the relative errors in measurements of the volumetric heat capacity and thermal diffusivity of heat-insulating materials through the use of a linear pulse heat sourc...

    S. V. Ponomarev, V. O. Bulanova, A. G. Divin, E. V. Bulanov in Measurement Techniques (2017)

  10. No Access

    Article

    Optimization of Measurements of the Thermophysical Properties of Thermally Insulating Materials

    A mathematical model is developed for the errors in measuring the thermal diffusivity and thermal conductivity of thermally insulating materials using the theory of heat conduction. A method is c...

    S. V. Ponomarev, V. O. Bulanova, A. G. Divin, E. V. Bulanov in Measurement Techniques (2016)

  11. No Access

    Article

    Determination of Temperature Dependence of Biomass Heat Capacity in Low-Temperature Pyrolysis (Prepyrolysis) Conditions

    Results of determination of effective heat capacity of untreated biomass granules are furnished. It is shown that evaporation of moisture and other volatile components present in the material affects heat abso...

    R. L. Is’emin, S. N. Kuz’min, S. V. Mishchenko… in Chemical and Petroleum Engineering (2015)

  12. No Access

    Article

    Measurements of the Thermal Characteristics of Materials by Regular Mode Methods of the Third Kind

    Methods of measuring the thermal characteristics of materials using periodic heating are considered. A classification of the regular-mode methods of the third kind as a function of the method of producing the ...

    D. A. Lyubimova, S. V. Ponomarev, A. G. Divin in Measurement Techniques (2015)

  13. No Access

    Article

    An automated measurement setup for studying the dependences of the thermal conductivity and rheological characteristics of non-Newtonian fluids on the shear rate

    An experimental setup designed for studying the rheological characteristics and thermal conductivity of liquid materials is described. The presented measurement and experimental-data-processing technique allow...

    A. G. Divin, S. V. Mishchenko, S. V. Ponomarev… in Instruments and Experimental Techniques (2008)

  14. No Access

    Article

    Method of measurement and a computerized workbench for a researcher on the thermal properties of liquids

    Physical and mathematical models of a measuring instrument are considered. A method of determining the thermal properties of materials is proposed. The structure of a measuring instrument and a computerized wo...

    S. V. Ponomarev, S. V. Mishchenko, S. V. Grigor'eva, A. G. Divin in Measurement Techniques (1998)

  15. No Access

    Article

    A method and a device for measuring the thermophysical properties of liquids

    Physical and mathematical models of a method of determining the thermophysical properties of liquids, the design of a measurement device, an automated system of scientific tests of thermophysical properties, a.....

    S. V. Ponomarev, S. V. Mishchenko, A. G. Divin, A. A. Churikov in Measurement Techniques (1994)

  16. No Access

    Article

    Method and automated equipment for investigation of the thermophysical properties of liquid laminar polymer flows

    S. V. Ponomarev, S. V. Mishchenko, A. G. Divin in Measurement Techniques (1992)