Determination of the thermal diffusivity to tow plaster by numerical method: Influence the Biot number and the heat exchange coefficient in transient regime

The thermal transfer in the tow plaster (insulating material) is modeled by numerical method resolution in transient regime. The discretization of the reduced space variable and the reduced temporal variable is applied to the heat equations, the boundary conditions and the initial condition. The expressions of the dimensionless temperature allowed to represent the curves of evolution of the reduced temperature in the reduced time. The time constant characterizing the reduction of the reduced temperature in the material makes it possible to calculate its thermal diffusivity.