Parameters affecting Biot number: Biot number is a heat transfer term, which is recorded as Bi. As dimensionless numbers such as Fourier number (Fo), prandtl number number (Pr) and Nusselt number (Nu), they are all important parameters of heat transfer.

Bi number provides a quantity to compare the temperature difference in solid with that between surface and fluid. If bi

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Biot (1774- 1862), French physicist. His greatest contribution is the study of the polarization of light. He studied the heat conduction of solids before Fourier, and realized that convection heat transfer on the surface should be considered in the heat conduction problem, but he failed to get an analytical solution.

1804, according to the heat conduction experiment of flat wall, Biw published an academic paper, and put forward the concept that heat conduction is directly proportional to the temperature difference between the two sides and inversely proportional to the wall thickness. It was after reading this article that Fourier put forward the method of separating variables to understand partial differential equations and the concept that the solution can be expressed as any function series in 1807.