Flow across Tube Banks

For comparison purposes let us also calculate the heat-transfer coefficient using Eq. (6-25). The film temperature is Tf = (350 + 300)/2 = 325 K so that 

Tsble 6-4 Correlation of Grimson tor Heat Transfer in Tube Banks of 10 Rows or More, From Ref. 12. for Use with Eq. (6-17). 

Pressure drop for flow of gases over a bank of tubes may be calculated with 

Zukauskas [39] has presented additional information for tube bundles which takes into account wide ranges of Reynolds numbers and property variations. The correlating equation takes the form 

The reader should keep in mind that these relations correlate experimental data with an accuracy of about 25 percent. 

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Further information on liquid-metal heat transfer in tube banks is given by Hsu for spheres and elliptical rod bundles [Int. J. Heat Mass Transfer, 8, 303 (1965)] and by Kahsh and Dwyer for oblique flow across tube banks [Int. ]. Heat Ma.ss Transfer, 10, 1533 (1967)]. For additional details of heat transfer with liqmd metals for various systems see Dwyer (1968 ed., Na and Nak supplement to Liquid Metals Handbook) and Stein ( Liquid Metal Heat Transfer, in Advances in Heat Transfer, vol. 3, Academic, New York, 1966). 

For turbulent flow across tube banks, a modified Fanning equation and modified Reynold s number are given. 

Figure 10-142. Pressure drop in fluid flowing across tube banks with segmental baffles. (Used by permission Buthod, A. P. Oil Gas Journal, V. 58, No. 3, 1960. PennWell Publishing Company. All rights reserved.)...

The results of a number of workers for heat transfer to and from gases flowing across tube banks may be expressed by the equation ... 

FIG. 6-45 Friction factors for transition region flow across tube banks. (Pitch is the minimum center-to-center tube spacing.) (From Bergelin, Brown, and Doberstein, Trans. ASME, 74, 953 [1952].)... 

PRESSURE DROP FOR FLOW ACROSS TUBE BANKS SINGLE-PHASE FLUIDS 7.79... 

Consider the causes of the pressure drop, and select equations to calculate each. The pressure drop for fluids flowing across tube banks may be determined by calculating the following components ... 

C In flow across tube banks, why is the Reynolds number based on the maximum velocity used instead of the uniform approach velocity ... 

C In flow across tube banks, how docs the heal transfer coefficient vary with the row number in the flow direction How does it vary with in the transverse direction for a given row number ... 

I. D. R. Grant and D. Chisholm, Horizontal TVvo-Phase Flow Across Tube Banks, Int. J. Heat Fluid Flow, 2(2), pp. 97-100,1980. 

C. The Chilton-Colburn analogy flow across tube banks... 

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