Engineering Physics Annotation << Back Heat Transfer Process in a Ring Rod Kanareykin A.I. The paper considers the process of heat transfer in an annular rod, which includes thermal conductivity in the rod and heat transfer on the channel surfaces (from a hot medium to one surface and from another surface to a cold, heated medium). This process can occur in annular channels formed by two tubes: an outer and an inner one. The article considers heat transfer, which includes both thermal conductivity and convective heat transfer. The solution to the problem was obtained in two ways: by the conjugation method and the Fourier method. Keywords: heat transfer, annular rod, generalized degrees, conjugation method, Fourier method. DOI: 10.25791/infizik.8.2025.1497 Pp. 32-36.