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Invited researcher Sunden Bengt Aake
Time span of the project
General information
Name of the project: Promising methods of heat transfer control in media with phase and chemical transformation in power generation, chemistry, chemical and electrochemical technologies, and microelectronics

Strategy for Scientific and Technological Development Priority Level: б
Goals and objectives

The objective of this project is the creation of the foundations for new methods for the control of the characteristics of transfer processes in application to solving large-scale problems of modern energy, chemical, electrochemical technologies, and microelectronics. This is the question of the creation of smart systems for the active and passive regulation of energy exchange intensity both to increase or decrease it.

The project includes several blocks linked to each other by a common methodology of the solution of thermodynamics problems, a complex approach allowing to efficiently solve modern complex problems of the energy industry and heat physics:

Block 1: The phenomena of interference of separated flows of various scales and their use for the solution of problems of heat exchange intensification. This block includes the following research directions:

  • Surface generators of longitudinal vortex for problems of passive control of the flow structure and heat and mass exchange;
  • Effects of hydrodynamic and thermal resonance in inter-costal cells and systems of periodic ribs;
  • Surfaces with intensified heat exchange in the presence of cavities and ledges of various shapes, sizes, and packing densities;
  • Two-phase, gas-droplet separated flows and new methods of inter-costal heat transfer control.

Block 2: The research of heat and mass transfer in vortex chemical reactors with a centrifugal pseudo-fluidised layer of solid particles:

  • The creation of vortex chambers to conduct research of heat and mass transfer with the possibility to vary the parameters of the swirled flow;
  • The creation of vortex apparatuses for electrochemical decomposition of water with a layer of Al2O3 particles modified with various coatings based on catalytically active metals.

Block 3: The intensification of heat transfer during evaporation and boiling in flowing liquid films of cooling agents on surfaces with gradient micro-mesh coatings:

  • The experimental research of heat transfer intensification in flowing films of a low-viscosity fluid on a structured surface with micro-fins and a micro-mesh coating in the evaporation and the nucleate boiling modes;
  • The experimental research of heat transfer during evaporation and boiling of a cooling agent in flowing films on a smooth surface and on a surface with a micro-mesh coating in a wide range of the Reynolds numbers of the film;
  • The visualisation of the process of flowing of films on surfaces with various structures, including micro-mesh coatings using high-speed video recording;
  • The processing and generalisation of obtained data, the comparison of results the research of heat transfer on smooth and micro-structured surfaces.

Block 4: The development of scientific foundations for methods of heat transfer control in energy technologies with the application of phase-change material (PCM):

  • Thermal conductivity of phase-change materials employing graphene nanotubes;
  • Thermal processes in PCMs of complex composition in a wide range of melting temperatures;
  • Applied aspects of the use of PCMs and problems of heat transfer control.

Block 5: Heat transfer and flow of liquids, gases and multi-phase fluids in micro- and nano-channels:

  • The research of the anisotropicity of the processes of transfer in nano- and micro-channels;
  • The modelling of the transfer coefficients of liquids and gases in micro- and nano-channels depending on the material of the walls and their possible structuring, the characteristic size of the channel and the temperature;
  • The study of the impact of the structure of the fluid in cramped conditions, including its rheology, on the heat transfer characteristics.
The practical value of the study

The creation of the laboratory will broaden the subject area of the Institute, will drive a number of experimental test benches and computational systems to a new level, it will allow to conduct complex research of phenomena and processes that, in the long term, will be interesting for the implementation into power engineering, chemical technologies, aircraft and machine manufacturing, and construction.

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