Cooling infinite rectangular plate with adiabatically isolated side wall under boundary conditions of the third kind

UDC 536.2

Cooling infinite rectangular plate with adiabatically isolated side wall under boundary conditions of the third kind

Kanareykin Aleksandr I.

For citation: Kanareykin A.I. Cooling infinite rectangular plate with adiabatically isolated side wall under boundary conditions of the third kind. Journal of International Academy of Refrigeration. 2022. No 3. p. 74-79. DOI: 10.17586/1606-4313-2022-21-3-74-79

Abstract
The article concerns the issue of non-stationary heat transfer.Thus, the issue of the research lies in the field of processes in which the state of the body tends to thermal equilibrium. The article presents a solution for the distribution of temperature field in an infinite rectangular plate with adiabatically isolated side wall. Heat transfer on the one side of the plate takes place under boundary conditions of the third kind and it does not take place on the other side. Due to the reason the task is non-symmetrical. The solution was found by the Fournier method and graphical method. As a result, we obtained an analytical expression for the distribution of plate temperature in expanded form with trigonometric and exponential functions. In addition, special cases, when internal thermal resistance of thermal conductivity was more or less of the external resistance of heat transfer, were considered and exemplified in the article. The special cases were interpreted in terms of physics. One of the cases reduces the task to the one with boundary conditions of the first kind, when the temperature of the surface is constant, which proves the validity of the results obtained.

Keywords: heat exchange, temperature field, rectangular plate, non-stationary heat transfer, the Fournier method, graphical method, boundary conditions of the third kind.


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