Heat transfer in in-tube flow of non-Newtonian fluids

Joshi, S. D.

doi:10.31274/rtd-180813-271

Cited by 2 publications

(4 citation statements)

References 53 publications

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“…For a Newtonian fluid the theoretical analysis by Yang (1962) generated an index of 0.11. As noted by Joshi (1978) there is a substantial discrepancy between this result and that of Shannon and Depew (1969) who performed a similar analysis for the case of a uniform heat flux boundary condition; their results gave an index of 0.3 at the entrance to the tube decreasing to 0.14 in the fully developed region. Joshi (1978) concluded that further work was needed to clarify the situation but the focus of his own work was on non-Newtonian fluids.…”

Section: Introductionmentioning

confidence: 57%

“…As noted by Joshi (1978) there is a substantial discrepancy between this result and that of Shannon and Depew (1969) who performed a similar analysis for the case of a uniform heat flux boundary condition; their results gave an index of 0.3 at the entrance to the tube decreasing to 0.14 in the fully developed region. Joshi (1978) concluded that further work was needed to clarify the situation but the focus of his own work was on non-Newtonian fluids. That Yang (1962) and Shannon and Depew (1969) had significantly different results may well be due to the former considering only heated tubes.…”

Section: Introductionmentioning

confidence: 57%

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Theoretical analysis of the viscosity correction factor for heat transfer in pipe flow

Mondal

Field

2018

Chemical Engineering Science

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In most heat transfer applications, knowledge of the viscosity variation is important. Thus viscosity correction factors have been researched and proposed for almost a century. One of the most successful relations was reported by Sieder-Tate in 1936, which has been widely used in engineering analysis and design. In this study, we have improved on the Sieder-Tate relation, following a classical theoretical analysis of the thermal boundary layer. An exact solution to the viscosity correction factor was obtained which shows that the Sieder-Tate correction factor over-predicts the heat transfer coefficient in the case of cold wall (cooling) and does not hold properly for hot wall (heating). We have found that a relation of � ∞ � 0.254

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Section: Introductionmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 57%

Theoretical analysis of the viscosity correction factor for heat transfer in pipe flow

Mondal

Field

2018

Chemical Engineering Science

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“…the interpolation tcchniqne suggrsted I)? Churchill and Cisagi (1972) as Mahalingam et al (1975) and Joshi (1978).…”

Section: Variable Consistency Correlationmentioning

confidence: 97%

“…The numerical method employed is described in detail in Joshi (1978) andJoshi andBergles (1978,1980). The procedure is explicit, utilizing a form of DuFort-Frankel (1953) dfierencing which results in a scheme for which the axial step size is not severely constrained due to stability considerations.…”

Section: ( a Y )mentioning

confidence: 99%

Heat transfer to laminar in‐tube flow of pseudoplastic fluids

Joshi

Bergles

1981

AIChE Journal

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= t enipcwt urc d q w n d e t i t slag the rmal conductivity = nuniher of physical cells in x ' = numlwr of physical cells in y ' = slag pressure September, 1981 AlChE Journal (Vd. 27, NO. 5 ) Energy: at at a PUC,, -+ puc, -=ax ay aY Continuity: 2.0 lated by the method suggested by Churchill and Usagi (1972) as = 4.36[1 + (0. 376(X+)-0.33)6]1'6 (8) This correlation is in excellent agreement with the correlation 7 8 9 1 0 % J I --= 5.08 Variable Viscosity,"]. of Heat Transfer, 84. 353-362 (1962). Yang. K . T., "Laminar Forced Convcction of Liquids in Tuhes with Greek Letters p = isolxiric, coefficient of thernial expansion Y = -l / p d p / d t or -1/K d K / d t A = ( 3 n + 1 ) / 4 n P = dc-nhity P = viscosity tuber 15, 1980.

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Heat transfer in in-tube flow of non-Newtonian fluids

Cited by 2 publications

References 53 publications

Theoretical analysis of the viscosity correction factor for heat transfer in pipe flow

Theoretical analysis of the viscosity correction factor for heat transfer in pipe flow

Heat transfer to laminar in‐tube flow of pseudoplastic fluids

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