TAILIEUCHUNG - Heat Transfer Handbook part 32

Heat Transfer Handbook part 32. The Heat Transfer Handbook provides succinct hard data, formulas, and specifications for the critical aspects of heat transfer, offering a reliable, hands-on resource for solving day-to-day issues across a variety of applications. | CIRCULAR AREA ON A SEMI-INFINITE FLUX TUBE 301 TABLE Correlation Coefficients for Three Flux Distributions Cn A - 1 A 0 A 1 Co C1 C3 C5 C7 case of a circular contact area on a half-space. The corresponding half-space results were reported by Strong et al. 1974 4kaRs 1 f A _ 1 2 32 3n2 for A 0 for A _ 1 2 Correlation Equations for Spreading Resistance Since the three series solutions presented above for the three heat flux distributions a - 2 0 2 converge slowly as e 0 correlation equations for the dimensionless spreading resistance 4kaRs for the three flux distributions were developed having the general form Co C1F C C with the correlation coefficients given in Table . The correlation equations applicable for the parameter range 0 e provide four-decimal-place accuracy. Simple Correlation Equations Yovanovich 1976b recommended the following simple correlations for the three flux distributions 4kaRs a1 1 - a2e in the range 0 e with a maximum error of and 4kaRs a1 1 - e a3 in the range 0 e with a maximum error of 1 . Hie correlation coefficients for the three flux distributions are given in Table . TABLE Correlation Coefficients for i 1 0 2 1 2 0 1 2 a1 1 a2 a3 302 THERMAL SPREADING AND CONTACT RESISTANCES TABLE Coefficients for Correlations of Dimensionless Spreading Resistance 4kaRs Flux Tube Geometry and Contact Boundary Condition Co C1 C3 C5 C7 Circle circle Uniform flux True isothermal flux Circle square Uniform flux Equivalent isothermal flux Accurate Correlation Equations for Various Combinations of Source Areas Flux Tubes and Boundary .

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