This found that approximately 94% of the data points fall within the deviation limit of ±12.5%. The regression coefficient value for this correlation has been found to be 0.96 and corresponding value of regression coefficient of each relation given in respective Figs. 22–27 are 0.91, 0.92, 0.88, 0.90, 0.96 and 0.96, respectively. The average absolute deviation in Nusselt number is found to be 5.03%. Therefore it can be concluded that correlation developed in this work can predict the values of Nusselt number with reasonable accuracy.