Predictions of the Laminarization Phenomena in an Axially Rotating Pipe Flow

Hirai, Shuichiro; Takagi, Toshimi; Matsumoto, Masaharu

doi:10.1115/1.3243573

Cited by 57 publications

(32 citation statements)

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“…The mean circumferential velocity has a parabolic profile shape and appears to be proportional to (r/R) 2 , independent of the Reynolds number and the rotation rates as shown experimentally [3][4][5]8] and numerically [10,13,14]. However, it is far from fully understood why such a universal velocity distribution exists.…”

Section: Discussionmentioning

confidence: 99%

Large eddy simulation of fully developed turbulent flow in a rotating pipe

Yang

2000

Int. J. Numer. Meth. Fluids

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Large eddy simulation (LES) has been applied to study the fully developed turbulent pipe flow, in particular, to examine the effects of swirl driven by the rotating wall of the pipe. Experimental observations have shown that the intensity of turbulence in the rotating pipe decreases gradually with an increase in rotation rate due to the stabilizing effect of the centrifugal force. These experimentally observed phenomena are confirmed numerically using LES by comparing not only mean velocity profiles but also turbulent intensity and Reynolds stresses at two different rotation rates. The performance of two different subgrid scale models, a dynamical model and the usual Smagorinsky model, has also been assessed for the case of fully developed turbulent swirling flow. A brief description of the numerical methods used with an efficient hybrid Fourier multigrid pressure solver is presented. Particular attention has been paid to the numerical treatment of boundary conditions at the centreline. Copyright © 2000 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 99%

Large eddy simulation of fully developed turbulent flow in a rotating pipe

Yang

2000

Int. J. Numer. Meth. Fluids

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“…However only limited results were presented so it is difficult to conclude the true performance of eddy-viscosity models. The conclusions of Torri et al are however in contrast with the work of Hirai et al 14 and Wallin et al 15 who concluded that the k − ε fails (with or without the Richardson correction for Hirai et al). Speziale et al 12 (also discussed in Jakirlic et al 8 ) demonstrated the theoretical inability of standard two-equation models to account for rotation, however this appeared to be for a flow subject to a rotating reference frame and the additional complexity of the fully-developed inlet flow means that in practice the performance of these models may partly reproduce the rotation-effects because of the influence of the changing pressure and azimuthal velocity 8 .…”

Section: Rotating Pipementioning

confidence: 76%

Computation of Turbulent Flow in a Rotating Pipe using the Elliptic Blending Reynolds Stress Model

Ashton

Stoellinger

2016

46th AIAA Fluid Dynamics Conference

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The flow through a axially rotating pipe is examined using the open-source code OpenFOAM for both standard eddy-viscosity models (Spalart-Allmaras & k − ω SST) and a low-Reynolds number Elliptic Blending Reynolds Stress Model with a homogenous turbulent dissipation rate equation. Corrections to the length-scale determining equation for rotation, based upon the work of Hellsten et al. (1998), are evaluated for both the SST and EB-RSM models. It is shown that for models with or without a rotation correction, the EB-RSM offered improved results over the SST model, better capturing the level of turbulence suppression and the parabolic circumferential velocity profile. A clear improvement to both the SST and EB-RSM models is observed when a Richardson correction is applied to the length-scale determining equations, resulting in much closer agreement to the experimental data. The results for the EB-RSM with this correction are in good agreement with previous studies and further improvements to the turbulent diffusion model would likely improve the correlation to the experiment even further. The performance of the SST model is better than expected although the reliance of both models on the Richardson correction suggests further work is needed to thoroughly assess the formulation of such corrections for a wider range of flows.

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“…This was confirmed by the Reich and Beer [15] as well. Laminarization of the velocity profiles was discovered by several other authors such as Murakami and Kikuyama [12], Hirai et al [9] and Imao et al [10], who studied the flow in axially rotating pipes. The most important characteristic of the laminarization phenomenon is its axial velocity profile; the turbulent flow profile becomes similar to the laminar velocity profile due to the pipe rotation.…”

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confidence: 92%

Heat Transfer Influenced by Turbulent Airflow Inside an Axially Rotating Diffuser

Bajcar

Širok

Hočevar

et al. 2007

Flow Turbulence Combust

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The paper presents a study of heat transfer between the turbulent airflow and the inner wall surface of an axial diffuser rotating around its longitudinal axis. Heat transfer was assessed through the measurement of a time-dependent temperature field of the diffuser inner wall surface. Measurements of the instantaneous flow velocity components were performed by a laser-Doppler anemometry system, which delivered information on mean velocity components as well as on the turbulence intensity. A significant increase of all three mean velocity components was observed near the rotating diffuser wall in comparison with a non-rotating diffuser. Temperature field measurements were carried out by means of infrared thermography. The experiment showed a significant dependence of the temperature field on the turbulent flowfield induced by diffuser rotation. A strong influence of the flow separation and reattachment on the temperature distribution was observed, while rotation was found to suppress the occurrence of flow separation from the diffuser wall. Properties of the velocity field such as turbulent kinetic energy were directly coupled with the temperature distribution in order to gain the information on how to enhance or reduce heat transfer by changing the integral parameters of the diffuser (e.g. rotation frequency or amount of flow).

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Predictions of the Laminarization Phenomena in an Axially Rotating Pipe Flow

Cited by 57 publications

References 0 publications

Large eddy simulation of fully developed turbulent flow in a rotating pipe

Large eddy simulation of fully developed turbulent flow in a rotating pipe

Computation of Turbulent Flow in a Rotating Pipe using the Elliptic Blending Reynolds Stress Model

Heat Transfer Influenced by Turbulent Airflow Inside an Axially Rotating Diffuser

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