Transient temperature distortion in a slab due to thermocouple cavity

An experiment was carried out in the transient period of heat conduction for a slab subjected to a constant heat flux at one surface and insulated on the other surface. Alumel-chromel thermocouples with a diameter of 0.0203 cm were embedded in the slab to determine how a geometric disturbance causes the measured transient temperature to deviate from that of an undisturbed one-dimensional response. The dimensionless time duration of measurement varied from 0 to 0.5. The deviation of temperature response resulting from the presence of a cavity is given as a function of the diameter and depth of the cavity so that a proper correction to the one-dimensional model can be made. The error for all locations and all hole diameters seems to remain the same as the dimensionless time parameter is increased to 0.5. It is found that the correction of error arising from cavity disturbance on a one-dimensional model may be the same as that for the dimensionless time parameter equal to 0.5.