MULTIPHYSICAL MODELING OF A PIPE-IN-PIPE HEAT EXCHANGER WITH A FLOW INTENSIFIER IN THE FORM OF A TWISTED PROFILED STRIP

The article discusses the multiphysical modeling of a pipe-in-pipe heat exchanger using a flow intensifier in the form of a twisted profiled strip. The results of numerical researches of heat transfer and friction coefficient under twisted flow conditions using CFD-modelling with the software complex COMSOL multytphisics 6.1 are presented. The data obtained as a result of CFD modeling were compared with the literature data, the data obtained show that the heat transfer coefficient and the coefficient of friction increased significantly in a pipe equipped with a flow intensifier in the form of a twisted profiled strip. The analysis conducted is aimed at evaluating the efficiency of heat exchange and optimizing the design of the apparatus. The use of a twisted strip as a flow intensifier allows to significantly improve heat exchange characteristics by improving turbulence and reducing temperature gradients. The modelling was carried out using numerical methods, which allows to take into account the complex interaction of thermal and hydraulic processes. The results of the research show that optimizing the size and location of the intensifiers can lead to further improvement of heat exchange characteristics. The results of the research show that optimizing the size and location of the intensifiers can lead to further improvement of heat exchange characteristics.