The effect of axially varying and unsymmetrical boundary conditions on heat transfer with turbulent flow between parallel plates

Hatton, A.P.; Quarmby, Alan

doi:10.1016/0017-9310(63)90081-4

Cited by 56 publications

(10 citation statements)

References 8 publications

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“…80-82. The expected value for the turbulent conductivity in HFIR is approximately 150-250 W/(m*K), per the values developed for fuel hot stripe simulations performed by Ruggles in 1997, using models from Hatton and Quarmby, 1963. The COMSOL simulated turbulent conductivity is 1-2 orders of magnitude larger in these simulations.…”

supporting

confidence: 64%

“…The eddy diffusivity in the flow due to turbulence also leads to enhancement of the fluid effective conductivity. The value for the turbulent thermal conductivity, λ, is defined as, The turbulent conductivity values are consistent with those developed for lateral conduction in the HFIR fuel cooling channel from simulations performed by Ruggles in 1997, using models from Hatton and Quarmby, 1963. This offers another indirect validation of the fidelity of the COMSOL two-dimensional fluid simulation.…”

Section: Uniform Power Distributionmentioning

confidence: 60%

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Evaluation of HFIR LEU Fuel Using the COMSOL Multiphysics Platform

Primm¹,

Ruggles²,

Freels³

2009

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supporting

confidence: 64%

Section: Uniform Power Distributionmentioning

confidence: 60%

Evaluation of HFIR LEU Fuel Using the COMSOL Multiphysics Platform

Primm¹,

Ruggles²,

Freels³

2009

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“…The model uses analytical solutions for Nu x for hydrodynamically fully developed, thermally developing flow between two parallel plates with one heated wall (representing the chip) and one adiabatic wall (representing the sapphire window) [16,17]. The model prescribes a uniform heat flux of 150 W/cm 2 for the heated wall, which represents a conventional GPU processor dissipating 135W.…”

Section: Experiments Design Requirementsmentioning

confidence: 99%

Calibration methodology for interposing liquid coolants for infrared thermography of microprocessors

Hom

Durieux

Miler

et al. 2012

13th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems

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There have been unprecedented temperature nonuniformities reported in conventional 2D-and emerging 3D-packaged multi-core microprocessors. Therefore, techniques for spatially resolving chip power and temperature profiles in fully operational chips are needed to improve circuit design and enable optimal cooling solutions. This paper presents a high-resolution, infrared (IR) thermography technique for microprocessors operating at fully-operational power levels. A custom, microfluidic heat sink with an IR-transparent working fluid (0.75 LPM) is manufactured to cool an instrumented test chip while permitting optical access for IR thermal imaging. A detailed system calibration is conducted to account for the temperature-dependent optical properties of the chip and heat sink. It is concluded that the IR imaging can be conducted with ~ 0.1 °C error over the temperature range of 45-90 °C if the fluid plenum height is less than 500 μm. For a 2 mm channel, the error can be as high as 43°C due to strong signal attenuation in the fluid.

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“…The results were condensed into a correlation to calculate the Nusselt number. Hatton and Quarmby [31,32] obtained a general correlation for the calculation of the Nusselt number in turbulent flow between asymmetrically heated parallel plates. In preliminary work, Barrow [33] obtained correlations for the Nusselt number for turbulent flow between parallel plates with unequal heat fluxes.…”

Section: Theoretical Studiesmentioning

confidence: 99%

Development of a turbulent near-wall temperature model and its application to channel flow

Akbari

Mertol

Gadgil

et al. 1986

Wärme- und Stoffübertragung

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Abstract.A numerical study of fluid flow and heat transfer in a two-dimensional channel under fully developed turbulent conditions is reported. A computer program which is capable of treating both forced and natural convection problems under turbulent conditions has been developed. The code uses the highReynolds-number form of the two equation turbulent model (k-e) in which a turbulent kinetic energy near-waU model is incorporated in order to accurately represent the behavior of the flow near the wall, particularly in the viscous sublayer where the turbulent Reynolds number is small. A near-wall temperature model has been developed and incorporated into the energy equation to allow accurate prediction of the temperature distribution near the wall and, therefore, accurate calculation of heat transfer coefficients.The sensitivity of the prediction of flow and heat transfer to variations in the coefficients used in the turbulence model is investigated. The predictions of the model are compared to available experimental and theoretical results; good agreement is obtained. The inclusion of the near-wall temperature model has further improved the predictions of the temperature profile and heat transfer coefficient. The results indicate that the turbulent kinetic energy Prandtl number should be a function of Reynolds number. Entwicklung eines turbulenten, wandnahen Temperaturmodelis und seine Anwendung auf Kanalstr6mungZusammenfassung. Es wird fiber eine numerische Studie der Str6-mung und des W~irmetransportes in einem zweidimensionalen Kanal mit voll entwickelter Turbulenz berichtet. Ein Computerprogramm wurde entwickelt, das in der Lage ist, sowohl Zwangsals auch Naturkonvektion unter turbulenten Bedingnngen zu behandeln. Das Programm verwendet die ,,High-Reynolds-Number"-Form des turbulenten Zweigleichungsmodells (k-e:Modell) in das ein Ansatz ffir die wandnahe, turbulente, kinetische Energie eingearbeitet ist, um das Verhalten der Str6mung nahe der Wand genau wiederzugeben, insbesondere in der viskosen Unterschicht, wo die turbulente Reynolds-Zahl klein ist. Es wurde ein wandnahes Temperaturmodell entwickelt und in die Energiegleichung eingearbeitet, um eine genaue Vorhersage der Temperaturverteilung nahe der Wand zu erm6glichen und damit die WS, rmefibergangskoeffizienten genau zu berechnen.Die

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The effect of axially varying and unsymmetrical boundary conditions on heat transfer with turbulent flow between parallel plates

Cited by 56 publications

References 8 publications

Evaluation of HFIR LEU Fuel Using the COMSOL Multiphysics Platform

Evaluation of HFIR LEU Fuel Using the COMSOL Multiphysics Platform

Calibration methodology for interposing liquid coolants for infrared thermography of microprocessors

Development of a turbulent near-wall temperature model and its application to channel flow

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