Effect of position of surface
A circular disc insulated from one side and having diameter 0.33m is exposed to air at Tf = 12°C. The disc surface is maintained at Ts = 128oC. Estimate the heat transfer when disc is horizontal with hot surface facing up. use Nu = 0.14(GrPr)1/3
Q = hAΔT
Q = hAΔT
A circular disc insulated from one side and having diameter 0.33m is exposed to air at Tf = 12°C. The disc surface is maintained at Ts = 128oC. Estimate the heat transfer when disc is horizontal with hot surface facing down. use Nu = 0.27(GrPr)1/4
Q = hAΔT
Q = hAΔT