ESDU 77031
Heat transfer by free convection and radiation  simply shaped bodies in air and other fluids.
Abstract:
ESDU 77031 gives equations for the free convective steadystate heat transfer coefficient for an internally heated or cooled (provided there is no condensation) vertical, inclined or horizontal flat plate, a vertical or horizontal cylinder, and a sphere. The equations are given for any fluid with a Prandtl number exceeding 0.7 and simplified equations are also given for the special case where the fluid is ambient air. In addition the radiative heat transfer from (or to) a body in an enclosure or close to a surface is considered, and view factor information is provided graphically for the body shapes considered. Also given is a table of emissivities of common surfaces. Practical worked examples illustrate the application of the data which is assisted by a guidance flowchart.Indexed under:
 Air
 Free Convection Heat Transfer
 Radiation Heat Transfer
 Stefanboltzmann Radiation Constant
 Thermal Emissivity
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Data Item ESDU 77031  

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This Data Item contains 10 interactive graph(s) as listed below.
Graph  Title 

Figure 1  Thermal conductivity of air at atmospheric pressure 
Figure 2  Flow regimes for inclined rectangular plates in ambient air 
Figure 3  View factor for parallel rectangular plates 
Figure 4a  View factor for rectangular plates joined along one edge. Φ = 30 degrees 
Figure 4b  View factor for rectangular plates joined along one edge. Φ = 60 degrees 
Figure 4c  View factor for rectangular plates joined along one edge. Φ = 90 degrees 
Figure 4d  View factor for rectangular plates joined along one edge. Φ = 120 degrees 
Figure 4e  View factor for rectangular plates joined along one edge. Φ = 150 degrees 
Figure 5  View factor for long cylinder parallel to long plate 
Figure 6  View factor for sphere and plate 
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