Abstract

In order to clarify the effect of heat conduction between the probe (hot or cold wire) and the prongs, the governing heat equation is solved by the Laplace method. The solution of the transient regime is obtained as the addition of five terms. The first one corresponds to the infinite length and the others are directly related to the influence of the longitudinal heat conduction from the wire to the prongs. Its effect has been evaluated for three wires (platinum, nickel and tungsten) commonly used in anemometry or thermometry.

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