J.of Soc of Agri Struc, Japan.
Vol.17,No.3 March 1987,13-19
Original:
Language: Japanese

    The mass transfer coefficient of the trunk of a live cow was mesured using a 10cm x 10cm mesuring band thinly smeared with naphthalene.
    By the respiratory movement of the trunk, the values obtained were about 4.7 times larger than of an experimental model of the trunk in the previous paper.
    Therefore, the mass transfer coefficient of the whole body could be considered to be about 2.7 times in 0.1 m/s air velocity and 2.1 times in 0.2 m/s air velocity larger than obtained in the model experiment of the previous paper.
    In view of these results, it can be considered that thermal panting occurring during hot climate is available for loss of heat from the body surface.

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