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Laminar heat transfer

A significant heat-transfer enhancement can be obtained when a nonckcular tube is used together with a non-Newtonian fluid. This heat-transfer enhancement is attributed to both the secondary flow at the corner of the nonckcular tube (23,24) and to the temperature-dependent non-Newtonian viscosity (25). Using an aqueous solution of polyacrjiamide the laminar heat transfer can be increased by about 300% in a rectangular duct over the value of water (23). [Pg.495]

Kostic M (1994) On turbulent drag and heat transfer reduction phenomena and laminar heat transfer enhancement in non-circular duct flow of certain non-Newtonian fluid. Int J Heat Mass Transfer 37 133-147... [Pg.190]

Nguyen TV (1992) Laminar heat transfer for thermal developing flow in ducts. Int J Heat Mass Transfer 35 1733-1741... [Pg.190]

The equivalent of radial flow for flat-plate geometries is Vy. The governing equations are similar to those for Vy. However, the various corrections for Vy are seldom necessary. The reason for this is that the distance Y is usually so small that diffusion in the y-direction tends to eliminate the composition and temperature differences that cause Vy. That is precisely why flat-plate geometries are used as chemical reactors and for laminar heat transfer. [Pg.303]

The tube side is preferable for the fluid that has the higher pressure, or the higher temperature or is more corrosive. The tube side is less likely to leak expensive or hazardous fluids and is more easily cleaned. Both pressure drop and laminar heat transfer can be predicted more accurately for the tube side. Accordingly, when these factors are critical, the tube side should be selected for that fluid. [Pg.199]

Siegel, R., Sparrow, E.M., and Hallman, T.M., Steady Laminar Heat Transfer in a Circular Tube with Prescribed Wall Heat Flux , Appl. Sci. Res., Sect. A, Vol. 7, p. 386,1958. [Pg.225]

Swearingen, T.W. and McEligot, D.M., Internal Laminar Heat Transfer with Gas Property Variation , Trans. ASME, Ser. C, J. Heat Transfer Vol. 93, pp. 432-440. 1971. [Pg.225]

Hallman, T.M., Combined Forced and Free-Laminar Heat Transfer in a Vertical Tube with Uniform Internal Heat Generation , Trans. ASME, Vol. 78. No. 8, pp. 1831-1841, 1956. [Pg.483]

Maitra, D. and Sabba Raju, K., Combined Free and Forced Convection Laminar Heat Transfer in a Vertical Annulus". J. Heat Transfer Vol. 97. pp. 135-137. 1975. [Pg.484]

The above analysis has considered the laminar heat transfer from an isothermal surface. In many practical problems the surface heat flux is essentially constant, and the objective is to find the distribution of the plate-surface temperature for given fluid-flow conditions. For the constant-heat-flux case it can be shown that the local Nusselt number is given by... [Pg.231]

The other properties to be used in the laminar heat-transfer analysis are... [Pg.257]

A somewhat simpler empirical relation was proposed by Sieder and Tate [2] for laminar heat transfer in tubes ... [Pg.279]

The calculation of laminar heat-transfer coefficients is frequently complicated by the presence of natural-convection effects which are superimposed on the forced-convection effects. The treatment of combined forced- and free-convection problems is discussed in Chap. 7. [Pg.279]

For inclined cylinders the data of Ref. 73 indicate that laminar heat transfer under constant-heat-flux conditions may be calculated with the following relation ... [Pg.345]

Sparrow, E.M., and Lin, S.H., (1962) Laminar Heat Transfer in Tubes Under Slip-Flow Conditions. J. Heat Tranter, pp.363-369. ... [Pg.148]

The problem was solved by R. Siegel, E. M. Sparrow, and T. M. Hallman, Steady laminar heat transfer in a circular tube with a prescribed wall heat flux, Appl. Sci. Res. 7, 386-92 (1958). The description here follows the textbook by J. C. Slattery, Advanced Transport Phenomena (Cambridge University Press, Cambridge, 1958). [Pg.184]

So far, we have studied a number of illustrative examples for two-phase laminar heat transfer following the analytical approach we used in Chapter 5. For two-phase turbulent heat transfer we use an approach based on two-length scale dimensional analysis and the correlation of experimental data in terms of dimensionless numbers resulting from this analysis. [Pg.544]

Blending of Laminar and Turbulent Nusselt Numbers. The previous two sections provided heat transfer equations for the cases where there is laminar heat transfer from the entire body, (Nue), and turbulent heat transfer from the entire body, (Nu,). To obtain a fit to heat transfer data over the entire range of Ra, the blending equation of Churchill and Usagi [54] is used ... [Pg.214]

For laminar heat transfer, the correlations for such disks have been given by Eq. 4.18 [227] ... [Pg.218]

Figure 4.24 compares Eq. 4.65, shown by the solid line, to the data of Karagiozis et al. [152, 153]. The data approach the asymptote for laminar heat transfer from a vertical flat plate (dotted line) at high Ra. The dashed line shows Eq. 4.65a with no correction (i.e., 8 Nu = 0) this correction is seen to be significant only at low Ra. [Pg.240]

T. V. Nguyen, Laminar Heat Transfer for Thermally Developing Flow in Ducts, Int. J. Heat Mass Transfer, (35) 1733-1741,1992. [Pg.427]

G J. Hsu, Exact Solution to Entry-Region Laminar Heat Transfer with Axial Conduction and Boundary Conditions of the Third Kind, Chem. Eng. Sci., (23) 457-468,1968. [Pg.427]

M. S. Bhatti, Limiting Laminar Heat Transfer in Circular and Flat Ducts by Analogy with Transient Heat Conduction Problems, unpublished paper, Owens-Corning Fiberglass Corporation, Granville, Ohio, 1985. [Pg.428]

E. M. Sparrow, and A. Haji-Sheikh, Laminar Heat Transfer and Pressure Drop in Isosceles Triangular, Right Triangular, and Circular Sector Ducts, /. Heat Transfer, (87) 426-427,1965. [Pg.433]

T. M. Ben-Ali, H. M. Soliman, and E. K. Zariffeh, Further Results for Laminar Heat Transfer in Annular Section and Circular Sector Ducts, J. Heal Transfer, (111) 1090-1093,1989. [Pg.438]

J. P. Zarling, Application of Schwarz-Neumann Technique to Fully Developed Laminar Heat Transfer in Noncircular Ducts, J. Heat Transfer, (99) 332-335,1977. [Pg.438]


See other pages where Laminar heat transfer is mentioned: [Pg.103]    [Pg.294]    [Pg.167]    [Pg.103]    [Pg.294]    [Pg.258]    [Pg.11]    [Pg.12]    [Pg.14]    [Pg.115]    [Pg.296]    [Pg.214]   
See also in sourсe #XX -- [ Pg.411 ]




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