1994
DOI: 10.1115/1.2911409
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Heat Transfer Predictions With Extended k–ε Turbulence Model in Radial Cooling Ducts Rotating in Orthogonal Mode

Abstract: Standard and extended k–ε turbulence closure models have been employed for three-dimensional heat transfer calculations for radially outward flow in rectangular and square cooling passages rotating in orthogonal mode. The objective of this modeling effort is to validate the numerical model in an attempt to fill the gap between model predictions and the experimental data for heat transfer in rotating systems. While the trend of heat transfer predictions by the standard k–ε turbulence model is satisfactory, the … Show more

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Cited by 29 publications
(21 citation statements)
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“…The improvement of 5-15% due to the extended k-c model has been found for flows in a range of rotation numbers, temperature ratios (buoyancy effects), Reynolds numbers and duct aspect ratios. In spite of this improvement, the difference between the data and wall function model predictions are anywhere between 0 and 40% with respect to the data (see Tekriwal, 1992). also employed the extended k-c model with wall function to compute heat transfer for rotating flows with uniform wall heat flux and uneven wall temperatures conditions and found a satisfactory agreement within 5-25% of the experimental data.…”
Section: Introductionmentioning
confidence: 96%
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“…The improvement of 5-15% due to the extended k-c model has been found for flows in a range of rotation numbers, temperature ratios (buoyancy effects), Reynolds numbers and duct aspect ratios. In spite of this improvement, the difference between the data and wall function model predictions are anywhere between 0 and 40% with respect to the data (see Tekriwal, 1992). also employed the extended k-c model with wall function to compute heat transfer for rotating flows with uniform wall heat flux and uneven wall temperatures conditions and found a satisfactory agreement within 5-25% of the experimental data.…”
Section: Introductionmentioning
confidence: 96%
“…Recently Prakash and Zerkle (1991) found satisfactory results (within 30-40% of the data) using the standard k-c model with the wall function for orthogonal mode rotating radial duct flows at high Reynolds number and with uniform wall temperature. Tekriwal (1992) used the extended k-c model (also in conjunction with the wall function) and found an improvement over the standard k-c model heat transfer predictions of up to 15% for rotating radial duct flows at high Reynolds number and high rotation number. The improvement of 5-15% due to the extended k-c model has been found for flows in a range of rotation numbers, temperature ratios (buoyancy effects), Reynolds numbers and duct aspect ratios.…”
Section: Introductionmentioning
confidence: 99%
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“…Smirnov (1978) obtained an asymptotic solution of the laminar rotating duct and gave a drag formula for this situation. Ovchinnikov and Rukolaine (1985) studied the development of laminar flow in a prismatic duct uniformly rotating about the (Wagner et al, 1991;Morris and Ghavami-Nasr, 1991;Han and Zhang, 1992;Han et al, 1993;Macfarlane and Joubert, 1998;Liou et al, 2001Liou et al, , 2003Martensson et al, 2002) and numerical studies based on the Reynolds-averaged Navier-Stokes (RANS) equations (Prakash and Zerkle, 1992;Tekriwal, 1994;Dutta et al, 1996;Hwang et al, 1998;Lin et al, 2001;Belhoucine et al, 2004) have been carried out on this topic, relatively few direct numerical simulations (DNS) or large eddy simulations (LES) results are available, especially results in which property variations are taken into account. Kristoffersen and Andersson did direct simulations of low Reynolds number turbulent flow in a rotating channel (Kristoffersen and Andersson, 1993).…”
Section: Introductionmentioning
confidence: 99%