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<p>The article deals with a heat radiation model used for heat flux calculation of an infrared heater. In general, we consider a system consisting of a set of objects, whereas a single object could stand for a heater, a reflector or a heated body. Each of the objects is defined by its bounding surface. The presented model applies a 2D restriction of the real system. The aim of a particular simulation is to obtain a heat flux distribution all over the heated body under given conditions such as objects temperature and material properties. Furthermore, the implemented model is used to design a reflector profile to obtain a desired heat flux distribution. The paper presents the implemented model, a comparison of simulated and measured data and an example of reflector design.</p>

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