Isothermal and heated turbulent upflow in a vertical annular channel – Part I. Experimental measurements

Kang, Seongwon; Patil, Bhushan S.; Zarate, J. A.; Roy, R. P.

doi:10.1016/s0017-9310(00)00150-2

Cited by 35 publications

(17 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, based on the ratio of the right-and left-hand sides of Equation (13) approaching to unity, as listed in Table II, it means that fully developed turbulent ows have been reached in our calculations for those Reynolds numbers. This behaviour is consistent with the experimental data [5,9,10] and DNS result [15]. Figure 6 shows the proÿles of the axial turbulence intensity, i.e.…”

Section: Mean Velocity and Friction Velocity Scalingsupporting

confidence: 89%

“…bulk mean velocity. According to the experimental data [4,5,9,10], it is noted that, similar to Figure 6, the peak values of turbulence intensities near the inner wall are higher than those near the outer wall. This behaviour can be reasonably explained based on the local friction velocities u i and u o listed in Table II with u i being higher than u o .…”

Section: Turbulence Intensities and Reynolds Stressessupporting

confidence: 66%

“…This behaviour is consistent with the DNS results [15], where statistical quantities were scaled by the local friction velocities u i and u o near the inner and outer wall, respectively. In extensive experiments [4,5,9,10], however, turbulence statistical quantities for the annular channel turbulent ow were usually normalized by a uniform velocity scale, e.g. bulk mean velocity.…”

Section: Turbulence Intensities and Reynolds Stressesmentioning

confidence: 99%

“…Heikal et al [7] measured the velocity ÿeld in heated ow of air through an annular channel. Hasan et al [8], Velidandla et al [9] and Kang et al [10] carried out experimental studies on the velocity and temperature ÿelds in turbulent unheated and heated liquid ow through a vertical concentric annular channel. Those experiments reasonably predicted higher turbulence intensities near the inner wall than those near the outer wall, when the turbulence characteristics are scaled by bulk mean velocity.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Large eddy simulation of turbulent concentric annular channel flows

Liu

2004

Numerical Methods in Fluids

View full text Add to dashboard Cite

SUMMARYFully developed turbulent concentric annular channel ow has been investigated numerically by use of large eddy simulation (LES) technique coupled with a localized one-equation dynamic subgrid-scale (SGS) model. The objective of this study is to deal with the behaviour of turbulent ow near the inner and outer walls of the concentric annular channel and to examine the e ectiveness of LES technique for predicting the turbulent ow in uenced by the transverse curvature e ect. The computations are performed for the Reynolds number Re = 180, 395 and 640, based on an averaged friction velocity and the annular channel width with the inner and outer cylinder radius being R i = 1 and Ro = 2. To validate the present approach, calculated results for turbulent pipe ow and concentric annular channel ow are compared with available experimental data and direct numerical simulation results, which conÿrms that the present approach can be used to study turbulent concentric annular channel ow satisfactorily. To elucidate turbulence characteristics in the concentric annular channel, some typical quantities, including the resolved velocity, turbulence intensity, turbulent eddy viscosity, SGS kinetic energy, SGS dissipation rate, Reynolds stress budgets, and turbulence structures based on the velocity uctuations, are analysed.

show abstract

Section: Mean Velocity and Friction Velocity Scalingsupporting

confidence: 89%

Section: Turbulence Intensities and Reynolds Stressessupporting

confidence: 66%

Section: Turbulence Intensities and Reynolds Stressesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Large eddy simulation of turbulent concentric annular channel flows

Liu

2004

Numerical Methods in Fluids

View full text Add to dashboard Cite

show abstract

“…Many researchers have investigated the heat transfer characteristics of narrow annuli channel (Kang et al, 2001;Zarate et al, 2001;Lu and Wang, 2008), and same researches aiming at the flow distribution of primary side (Zeng et al, 2007;Wei et al, 2011). These related studies indicate that the heat transfer characteristics of narrow annuli are different from conventional channels.…”

Section: Introductionmentioning

confidence: 99%

Operation characteristic of Integrated Pressurized Water Reactor under coordination control scheme

Xia

Liu

2015

Annals of Nuclear Energy

View full text Add to dashboard Cite

CFD applied to turbulent flows in concentric and eccentric annuli with inner shaft rotation

et al. 2011

View full text Add to dashboard Cite

Turbulent flows in concentric and eccentric annuli with and without rotating inner cylinder were investigated by numerical simulations. Similar flows occur in drilling operations of oil wells. Several turbulence models with Reynolds Average Navier-Stokes approach were used in the simulations and the respective models predictions were compared with experimental data from the literature. The simulated results of axial and tangential velocities show a good agreement with the experimental data. As compared with another turbulence models, the simulations with the standard Reynolds Stress model presented a slightly better prediction for most of the responses studied.On a analysé des turbulences en espaces annulaires concentriques et excentriques avec ou sans cylindre interne tournantà l'aide de simulations numériques. Desécoulements semblables se produisent lors d'activités de forage de puits de pétrole. Plusieurs modèles de turbulence avec l'approche de Navier-Stokes en moyenne de Reynolds ontété utilisés dans les simulations et les prédictions respectives des modèles ontété comparées aux données expérimentales de la littérature. Les résultats simulés des vélocités axiales et tangentielles cadrent bien avec les données expérimentales. Comparativementà d'autres modèles de turbulence, les simulations avec le modèle de tension de Reynolds standard ont présenté une prédiction légèrement supérieure pour la plupart des réponsesétudiées.

show abstract

Isothermal and heated turbulent upflow in a vertical annular channel – Part I. Experimental measurements

Cited by 35 publications

References 17 publications

Large eddy simulation of turbulent concentric annular channel flows

Large eddy simulation of turbulent concentric annular channel flows

Operation characteristic of Integrated Pressurized Water Reactor under coordination control scheme

CFD applied to turbulent flows in concentric and eccentric annuli with inner shaft rotation

Contact Info

Product

Resources

About