Computation of Free Convective Nusselt Number from Horizontal Cylinders Using Semi-Empirical Relationships
Abstract: Natural convective heat transfer from a horizontal cylinder in gases is theoretically studied. A test cylinder of length 20cm is used. A thin wire runs coaxially in the cylinders of varied diameter of 0.01 to 0.03mm and is maintained at a constant temperature of 540C by an electric current. The wire is exposed progressively to air, argon, carbon dioxide, nitrogen and oxygen at atmospheric pressure and at 230C. On a logarithmic scale, the Nusselt number is plotted against the Raleigh number using five traditional correlations, Morgan, Kyte et al, Chu and Churchill, Kuehn and Goldstein, and Raithby and Holland. A new correlation relation is developed which agrees well with the basis Kyte et al experimental.
Keywords: Nusselt number, Raleigh number, Grashof number, heat transfer
How to Cite?: B. S. Mbang, M. F. Haque, "Computation of Free Convective Nusselt Number from Horizontal Cylinders Using Semi-Empirical Relationships", Volume 6 Issue 10, October 2017, International Journal of Science and Research (IJSR), Pages: 1078-1081, https://www.ijsr.net/getabstract.php?paperid=29091717, DOI: https://dx.doi.org/10.21275/29091717