Coupled systems mechanics

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Establishing non-linear convective heat transfer coefficient

  • Received : 2021.08.29
  • Accepted : 2021.10.11
  • Published : 2022.04.25
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Abstract

The aim of the work presented in this paper is development of numerical model for prediction of temperature distribution in pavement according to the measured meteorological parameters, with introduction of non-linear heat transfer coefficient which is a function of temerature difference between the air and the pavement. Developed model calculates heat radiated from the pavement back in the air, which is an important part of the heat trasfer process in the open air surfaces. Temperature of the pavement surface, heat radiation together with many meteorological parameters were measured in series during two years in order to validate the model and calibrate model parameters. Special finite element method for temperature heat transfer towards the soil together with the time integration scheme are used to solve the governing equation. It is proved that non-linear heat transfer coefficient, which is a function of time and temperature difference between the air and the pavement, is required to decribe this phenomena. Proposed model includes heat tranfer coefficient callibration for specific climate region, through the iterative inverse procedure.

Keywords

Acknowledgement

The research described in this paper was financially supported by the Croatian Science Foundation through the project Separation of influence parameters in engineering modeling with parameter identification (IP-2019-04-7926).

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