An experimental study of flow boiling in a rectangular channel with offset strip fins

Boiling heat transfer in narrow channels with offset strip fins: Application to electronic chipsets cooling

“…The dependence of heat transfer coefficient on heat flux observed in our experiments is not very strong, in accord with Kim and Sohn [8]. They observed that it is more difficult to find a clear distinction between the nucleate boiling region and the convective boiling region in channels with offset strip fins than in round tubes.…”

“…Figure (7) shows the Reynolds factor obtained from experiments, as a function of 1/X (symbols). In the figure, dashed line represents the correlation found by Kim and Sohn [8] for offset strip fins (for 1/X > 1)…”

“…Flow boiling heat transfer has then been studied by means of a superposition method [2]. The Colburn factor has been used for contribution of forced convection in flow boiling heat transfer, together with two correlations for Reynolds factor ( [3] and [8]). The contribution of saturated nucleate boiling has been investigated by means of a pool boiling correlation weighted by Kim and Sohn suppression factor [8].…”

“…The Colburn factor has been used for contribution of forced convection in flow boiling heat transfer, together with two correlations for Reynolds factor ( [3] and [8]). The contribution of saturated nucleate boiling has been investigated by means of a pool boiling correlation weighted by Kim and Sohn suppression factor [8]. The thermal performances of the loop presented in this paper have been finally investigated, in terms of thermal resistances and overall heat transfer rate.…”

“…The first objective has been the experimental study of boiling heat transfer within two narrow channels with offset strip fins. A superposition method ( [2], [3], [8]) has been used, in order to distinguish the contribution of nucleate boiling from convective boiling. Some correlations have been taken by the literature and discussed.…”