Turbulent velocity field in isothermal and heated liquid flow through a vertical annular channel

Velidandla, V.; Putta, S.; Roy, R. P.

doi:10.1016/0017-9310(96)00030-0

Cited by 15 publications

(6 citation statements)

References 17 publications

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“…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: 90%

“…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 Stressesmentioning

confidence: 51%

“…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%

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Large eddy simulation of turbulent concentric annular channel flows

Liu

2004

Numerical Methods in Fluids

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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.

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Section: Mean Velocity and Friction Velocity Scalingsupporting

confidence: 90%

Section: Turbulence Intensities and Reynolds Stressesmentioning

confidence: 51%

Section: Turbulence Intensities and Reynolds Stressesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Large eddy simulation of turbulent concentric annular channel flows

Liu

2004

Numerical Methods in Fluids

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“…Heikal et al (1976) measured the velocity field of heated airflow through an annular channel. Hasan et al (1992), Velidandla et al (1996) and Kang et al (2001) took experimental studies on the velocity and temperature fields of the unheated and heated turbulent liquid flow through a vertical concentric annular channel.…”

Section: Introductionmentioning

confidence: 99%