Discussions of transient heat transfer to a water droplet on heated surfaces under atmospheric pressure

This paper discusses the transient heat transfer to a water droplet on heated surfaces considering a surface temperature change, in the contact period when the droplet is in contact with them. The initial surface temperature ranges from the lowest limit of the nucleate boiling region to the Leidenfrost point. Attention is paid to the two parts of the contact period : the waiting period before the onset of the first bubbling and the successive boiling period after this onset. Our proposal of transient heat transfer is based on some assumptions backed up by theoretical and experimental considerations—a theory of the first bubbling by Michiyoshi and a few experimental results from our previous papers and other works.