In their paper (1), the authors state on p. 1245 that Boyd and Meng (2) in 1996 suggested an interpolation method for calculating the heat transfer characteristics in the partial boiling region, along with Eqs. (13)-(14). The authors of (1) further state that Kandlikar (3) in 1998 proposed a similar scheme and that the constants , , and were assumed to be constant.
In this discussion, we would like to point out a few errors/omissions in the above referenced paper (1).
1. In their technical note, Boyd and Meng (2) refer to the paper by Kandlikar (4), published in 1990, for the Eqs. (13)-(14) referred to in (1). Unfortunately, Boyd and Meng quoted the wrong reference for the Kandlikar work in which the original model and equations were reported. The 1990 paper by Kandlikar (4), erroneously referred by Boyd and Meng, presents a correlation in the saturated flow boiling region and makes no reference to subcooled flow boiling. The correct reference in Boyd and Meng’s paper should have been Kandlikar (5), which was published in 1991.
2. In his 1991 paper, Kandlikar (5) presented Eqs. (21)-(29) with an accompanying Fig. 4 explaining the construction in the subcooled partial boiling region. Immediately following Eq. (26), a note appears regarding the exponent , which matches the slope at the two ends. Kandlikar (5), however, contains typographical errors in Eqs. (25) and (26) for coefficients and .
3. Those typographical errors were later corrected by Kandlikar (3) in 1998.
5. Discussion related to Fig. 6 appearing in (1) is correct, except that the 1998 paper by Kandlikar (3) referred therein simply corrects the typographical error and provides a more detailed comparison with the available experimental data.
Subcooled Flow Boiling Model Description
For convenience, the correct form of the subcooled flow boiling model and coefficients are presented below.
Further details on calculating and are given in Kandlikar (3).