Heat transfer in tube

Dippeiy and Sabersky [Int. ]. Heat Mass Transfer, 6, 329 (1963)] present a complete discussion of the influence of roughness on heat transfer in tubes. 

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). 

Seban, R. A., and E. F. McLaughlin. Heat transfer in tube coils with laminar and turbulent flow. Int. J. Heat Mass Transfer 6 387-39, 1%3. 

A somewhat simpler empirical relation was proposed by Sieder and Tate [2] for laminar heat transfer in tubes ... 

Note that the relation in Eq. (6-12) is the same as Eq. (5-114), except that the Stanton number has been multiplied by Pr2/3 to take into account the variation of the thermal properties of different fluids. This correction follows the recommendation of Colburn [15], and is based on the reasoning that fluid friction and heat transfer in tube flow are related to the Prandtl number in the same way as they are related in flat-plate flow [Eq. (5-56)]. In Eq. (6-12) the Stanton... 

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). 

Kalish and Dwyer [41] have presented information on liquid-metal heat transfer in tube bundles. 

A. Zukauskas and R, Ulinskas, Efficiency Parameters for Heat Transfer in Tube Banks." Heal Transfer Engineering no. 2 (1985), pp. 19-25. 

Sparrow, E.M., and Lin, S.H., (1962) Laminar Heat Transfer in Tubes Under Slip-Flow Conditions. J. Heat Tranter, pp.363-369. ... 

Zukauskas, A. A. Makayawizus, V.I. Zlantzauskas, A. K. Heat transfer in tube bundles with crossflow of fluids (russ.). Vilnjus Mintis 1968... 

Note that Equation (9.85) is basically the same general form as the familiar Dittus-Boelter equation for heat transfer in tubes. The basic heat-transfer mechanism is identical. It is dependent on the flow of fluid next to the heat-transfer surfaces, whether these are the vessel walls or some internals. Differences in the correlations are therefore mainly due to the differences in flow characteristics generated by the different impellers relative to the surface under consideration. This is reflected in the value of K. 

Problems of convective heat transfer in tubes of more complicated profiles were considered in [418]. 

S. W. Hong, and A. E. Bergles, Augmentation of Laminar Flow Heat Transfer in Tubes by Means of Twisted-Tape Inserts, tech. rep. HTL-5, ISU-EMI-Ames 75011, Eng. Res. Inst., Iowa State University, Ames, 1974. 

L. T. Fan, S. T. Lin, and N. Z. Azer, Surface Renewal Model of Condensation Heat Transfer in Tubes With In-Line Static Mixers, Int. J. Heat Mass Transfer (21) 849-854,1978. 

D. P. Traviss and W. M. Rohsenow, The Influence of Return Bends on the Downstream Pressure Drop and Condensation Heat Transfer in Tubes, ASHRAE Trans. (79/1) 129-137,1973. 

It is clear that the coolant must be purified. While this is not a problem for sodium, in case of lead one should bear in mind presence of permanent oxides in the circuit taking into consideration corrosion activity of lead and necessity of protective oxide films formation on the metal surface. Comparison of heat transfer in tubes with sodium and lead-bismuth described by (6.1) and (6.2) equations is shown in the Table 6.1. 

Sparrow EM, Lin SH (1962) Laminar heat transfer in tubes under slip-flow ctmditions. J Heat Transf 84 363-369... 

Ozawa M, Umekawa H, Matsuda T, Takenaka N, Matsubayashi M. Flow pattern and heat transfer in tube banks of a simulated fluidized bed heat exchangers. JSME Intern J, Ser B 41(3) 720-726, 1998. 

The first boundary condition, Equations 5.211 and 5.212, follows for symmetry reasons, whereas the second one. Equation 5.213, denotes that the heat flux at the reactor wall should be equal to the heat flux through the reactor wall, Uw(T — Tc), where Uw is a heat transfer coefficient that includes the fluid film at the inner surface of the wall, the reactor wall itself, and the fluid film at the outer surface of the reactor. The value of the heat flux, t/w> can be estimated from standard correlations for heat transfer in tubes. 

B.3 Forced Convection Heat Transfer in Tubes-Short Contact Times. A polymeric fluid whose viscosity function is described by the Ellis model is flowing through the tube as shown in Figure 5.26. Determine the temperature profile and the wall heat flux for the... 

PETUKHOV, B.S., KURGANOV, V.A. and GLADUNTSOV, A.I., Turbulent heat transfer in tubes to gases with variable physical properties . Heat and Mass Transfer, Izd. ITMO ANBSSR, Minsk, Vol. 1, ppl 17-127, (1972). 

---