Relaminarization in tubes

McEligot, Donald M.; Coon, C. W.; Perkins, H. C.

doi:10.1016/0017-9310(70)90118-3

Cited by 161 publications

(47 citation statements)

References 5 publications

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“…19 that the peak value of Kv T is lower than 1×10 -7 in this paper. McEligot et al [24] suggests that for Kv T < 3×10 -6 the flow remains turbulent, while for higher values it is likely to revert to laminar. In the present paper, Kv T is far less than the given value, which implies that the flow acceleration is negligible in the rifled tube.…”

Section: Effect Of Flow Accelerationmentioning

confidence: 97%

“…The non-dimensional flow acceleration parameter proposed by McEligot et al [24] is used in this paper to evaluate the flow acceleration, which is given by:…”

Section: Effect Of Flow Accelerationmentioning

confidence: 99%

“…Jackson and Hall [23] proposed a nondimensional buoyancy parameter to evaluate the significance of buoyancy effect. McEligot et al [24] suggested a non-dimensional heating acceleration parameter to assess flow acceleration effect due to thermal expansion. Pioro et al [25,26] summarized the previous researches and compared the heat transfer coefficient correlations.…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer characteristics of water flowing in a vertical upward rifled tube with low mass flux

Shen

Yang

Mao

et al. 2016

Experimental Thermal and Fluid Science

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Section: Effect Of Flow Accelerationmentioning

confidence: 97%

“…The non-dimensional flow acceleration parameter proposed by McEligot et al [24] is used in this paper to evaluate the flow acceleration, which is given by:…”

Section: Effect Of Flow Accelerationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heat transfer characteristics of water flowing in a vertical upward rifled tube with low mass flux

Shen

Yang

Mao

et al. 2016

Experimental Thermal and Fluid Science

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“…For another low-Reynolds-number turbulent situation, McEligot and his colleagues have been measuring laminarization of gas flows due to strong heating in longitudinal flow through tubes and ducts [McEligot, Coon and Perkins, 1970;Perkins, Schrade and McEligot, 1973;Shehata and McEligot, 1998] and have been successfully applying various turbulence models for its prediction [McEligot and Bankston, 1969;Perkins and McEligot, 1975;Nishimura et al, 2000;Ezato et al, 1999]. They have also been obtaining data for the related problem of turbulence structure in the viscous layers of flows with strongly favorable pressure gradients [Chambers, Murphy and McEligot, 1983;McEligot and Eckelmann, 1993].…”

Section: Related Workmentioning

confidence: 99%

Measurements of Fundamental Fluid Physics of SNF Storage Canisters

Condie¹,

Creery²,

McEligot³

2001

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SummaryWith the University of Idaho, Ohio State University and Clarksean Associates, this research program has the long-term goal to develop reliable predictive techniques for the energy, mass and momentum transfer plus chemical reactions in drying / passivation (surface oxidation) operations in the transfer and storage of spent nuclear fuel (SNF) from wet to dry storage. Such techniques are needed to assist in design of future transfer and storage systems, prediction of the performance of existing and proposed systems and safety (re)evaluation of systems as necessary at later dates.Many fuel element geometries and configurations are accommodated in the storage of spent nuclear fuel. Consequently, there is no one generic fuel element / assembly, storage basket or canister and, therefore, no single generic fuel storage configuration. One can, however, identify generic flow phenomena or processes which may be present during drying or passivation in SNF canisters. The objective of the INEEL tasks was to obtain fundamental measurements of these flow processes in appropriate parameter ranges.With the University of Idaho, an idealization of a combined drying and passivation approach has been defined in order to investigate the generic flow processes. This simulation includes flow phenomena that occur in canisters for high-enrichment and medium-enrichment fuels, where fuel element spacing in the canister is increased as compared with low enrichment fuel. Canister diameter was taken as 46 cm (18 in.) and a single basket of about 1.3 meters (4 ft.) length was considered. A long central tube ("dip tube") served as the inlet as in one earlier concept for a passivation process; while this concept apparently has not yet been selected for application, it provides an excellent example of the coupled, complex phenomena which may be present in canister flows. Suggested design flow rates for this hypothesized application indicate that the Reynolds number in the inlet tube would be expected to be between 2500 and 5000, i.e., relatively low.The local distributions of convective mass transfer characteristics (drying/passivation) are expected to depend on the freestream turbulence in the flow around stored fuel elements. The magnitudes of this turbulence depend on the turbulence distributions on the upstream side of the perforated basket support plate ("inlet plenum") and, in turn, in the impinging jet and in the inlet tube. This information can assist engineers in understanding variations of surface drying and passivation through an array and approaches to modify designs to counter non-uniformities and to improve iii distribution, as well as providing bases for assessment of computational fluid dynamics codes proposed for the purpose.A water-flow experiment with a 3/4-scale model (relative to the idealized canister) has been used for overall flow visualization and velocity measurements, with and without an array of simulated fuel elements. Observations have been made with perforated plates (representing basket support plates) having...

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“…This is referred to as laminarization (Torii and Yang (1997), Bankston (1970), and Ezato et al (1999)). Numer ous investigators have reported the criteria for the occurrence of laminarization and the heat transfer characteristics of the phenomenon , McEligot et al (1970),…”

Section: Introductionmentioning

confidence: 99%

Large eddy simulation of compressible turbulent pipe flow with heat transfer

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Relaminarization in tubes

Cited by 161 publications

References 5 publications

Heat transfer characteristics of water flowing in a vertical upward rifled tube with low mass flux

Heat transfer characteristics of water flowing in a vertical upward rifled tube with low mass flux

Measurements of Fundamental Fluid Physics of SNF Storage Canisters

Large eddy simulation of compressible turbulent pipe flow with heat transfer

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