Correlation for convective heat transfer coefficient of a solar still glass cover with mixed convection consideration

All the experimental data is in the Excel worksheets. It contains data in these files (1) File name - LAT-1: (a) Calculation of local apparent time (LAT), hour angle (in degrees), (b) Calculation of fraction of absorbed solar radiation on outer glass cover (2) File name - Outer hc Glass - 2: Components and ambient temperatures, wind data, solar radiation data, experimental convective heat transfer coefficient hc, (3) File name - Outer hc Glass - 3: (a) Calculation of Rayleigh No. (Ra), Reynolds No. (Re) and Nusselt No. (Nu) ( b) Development of Correlation for Nu (c) Comparison of hc given by various correlations (d) Graphs