Laminar forced convection heat transfer of a non-newtonian fluid in a square duct

Chandrupatla, Ashok R.; Sastri, V. M. K.

doi:10.1016/0017-9310(77)90027-8

Cited by 79 publications

(11 citation statements)

References 2 publications

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“…Predictions from these correlations compare very favorably with previous computational 28, 31 and experimental 32 results for conventional channels, as well as with experimental results for microchannel heat sinks 4 as demonstrated in Ref. 30.…”

Section: Correlationssupporting

confidence: 82%

Design and Optimization of Single-Phase Microchannel Heat Sinks

2013

Encyclopedia of Thermal Packaging

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Prediction of heat transfer and pressure drop in single-phase flow of a liquid or gas through microchannels is discussed, along with an assessment of the applicability of conventional theory developed for larger-scale channels. Methods for device-level and system-level optimization for thermal performance in cooling applications are described. The importance of manifold design is elucidated. A novel approach to hot-spot thermal management using microchannel heat sinks is demonstrated.

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Section: Correlationssupporting

confidence: 82%

Design and Optimization of Single-Phase Microchannel Heat Sinks

2013

Encyclopedia of Thermal Packaging

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“…Chandrupatla and Sastri [15] numerically analyzed the thermal entrance length problem for a square duct with the H1, H2 and T boundary conditions. While they used finer grids than those of Wibulswas [5], and their results agree closely with the proposed correlation as shown in Figure 8, limited data were reported in the region close to the channel entrance.…”

Section: Comparison With Existing Results For Conventional Channelsmentioning

confidence: 99%

“…Predicted dimensionless thermal entrance length as a function of aspect ratio for channel with rectangular cross-section in thermally developing flow. [14] and Chandrupatla and Sastri [15] for  = 1. Figure 9.…”

Section: Comparison With Experimental Data For Microchannelsmentioning

confidence: 99%

Thermally developing flow and heat transfer in rectangular microchannels of different aspect ratios

Lee

Garimella

2006

International Journal of Heat and Mass Transfer

375

141

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Laminar convective heat transfer in the entrance region of microchannels of rectangular cross section is investigated under circumferentially uniform wall temperature and axially uniform wall heat flux thermal boundary conditions. Three-dimensional numerical simulations were performed for laminar thermally developing flow in microchannels of different aspect ratios. Based on the temperature and heat flux distributions obtained, both the local and average Nusselt numbers are presented graphically as a function of the dimensionless axial distance and channel aspect ratio. Generalized correlations, useful for the design and optimization of microchannel heat sinks and other microfluidic devices, are proposed for predicting Nusselt numbers. The proposed correlations are compared with other conventional correlations and with available experimental data, and show very good agreement.

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“…Namely, the¯uid¯ow states can cause a drastic transition when the local change in viscosity becomes larger with the increase in Ra. The¯uid¯ows for the 0.7 wt% Natrosol solution are shown in Figure 7 when Ra = 1.0610 5 . As for the other solutions, a¯ow situation similar to the case of Ra = 4.0610 4 and 8.0610 4 could be obtained.…”

Section: Heat Transfer Of Pseudoplastic Fluids 367mentioning

confidence: 97%

A Numerical Study on Natural Convective Heat Transfer of Pseudoplastic Fluids in a Square Cavity

Ohta¹,

Ohta²,

Akiyoshi³

et al. 2002

Numerical Heat Transfer, Part A: Applications

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The natural convective heat transfer of pseudoplastic uids in a square cavity with a heated bottom and cooled top walls was examined by a direct numerical analysis using the Sutterby model. Consequently, it could be veri ed that the heat transfer rate of pseudoplastic uids became larger than that of a Newtonian uid under thermal conditions where stable vortex ows were formed. The reason is that uid ows are easy to further develop particularly near the walls due to the decrease in the apparen t viscosity by the shear-thinning effect. On the other hand, it was found that the locally larger change in viscosity had the potential of causing the formation of a complicated ow eld when the non-Newtonian uid was highly pseudoplastic and the Rayleigh number increased. The contribution of the shear-thinning effect depending on the non-Newtonian property and the thermal condition was clearly revealed.

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Laminar forced convection heat transfer of a non-newtonian fluid in a square duct

Cited by 79 publications

References 2 publications

Design and Optimization of Single-Phase Microchannel Heat Sinks

Design and Optimization of Single-Phase Microchannel Heat Sinks

Thermally developing flow and heat transfer in rectangular microchannels of different aspect ratios

A Numerical Study on Natural Convective Heat Transfer of Pseudoplastic Fluids in a Square Cavity

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