【Daily Question】Theoretical Foundation 2020.10.19
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This post was last edited by Qingse Nianhua on 2020-10-19 at 12:13. Multiple-choice question: The question is as shown in the figure ( ). Answer: A. Hint: Those who can explain the solution process will receive an additional reward; the answer can be posted in the replies
This post was last edited by h20090630 on 2020-10-19 at 22:53. According to Fourier’s law of heat conduction, the heat flux density for a one-dimensional flat wall is as follows: In steady-state heat conduction, the heat flux density q is constant; therefore, the temperature gradient within the flat wall is inversely proportional to the thermal conductivity of the material. When the thermal conductivity of the material does not change with temperature, the temperature gradient is equal everywhere within the flat wall ； When the thermal conductivity changes with temperature, the temperature gradient within a flat wall is no longer equal everywhere.