Prediction of Turbulent Flow and Heat Transfer in a Radially Rotating Square Duct

Prakash, Chander; Zerkle, R. D.

doi:10.1115/1.2928037

Cited by 91 publications

(52 citation statements)

References 15 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the entire range of Nu levels measured, the buoyancy ratios are thus well below the value of 0.1, which, according to Prakash ans Zerckle [17], is the minimum needed for buoyancy effects to start to become noticeable.…”

Section: Apparatus and Instrumentationmentioning

confidence: 95%

Experimental study of thermal development in a rotating square-ended U-bend

Iacovides

Kounadis

2009

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

Section: Apparatus and Instrumentationmentioning

confidence: 95%

Experimental study of thermal development in a rotating square-ended U-bend

Iacovides

Kounadis

2009

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

“…They employed this modified model to simulate a rotating channel and their results confirmed the need for the inclusion of a Coriolis model for turbulence modification. Prakash and Zerkle [3] predicted the turbulence flow and heat transfer in a rotating duct of square cross section with the standard k model. Compared to the experimental data, their numerical results are under predicted over the trailing face.…”

Section: Thermal Conductivity W/(m·k) Numentioning

confidence: 99%

Computational research on rotating channel by a modified anisotropic turbulence model

2011

View full text Add to dashboard Cite

Based on the simplified format of the Reynolds stress equations, a fire-new rotational-modification method for the anisotropic turbulence model has been presented. A three-dimensional Navier-Stokes code with this new rotational modified k turbulence models (=0.1 and =1) and the standard k turbulence model have been used for the prediction of flow and heat transfer characteristics in a rotating smooth square channel. The Reynolds number Re based on the inlet velocity of the cooling air and hydraulic diameter is 6000 .The rotating speed are 300, 600, 900, 1200rpm respectively. The calculations results of using three turbulence models have been compared with the experimental data. The research results show that (1) the rotational modification coefficient Rf 13 used in the new anisotropic k model would increased/decreased the predictions of heat transfer on the trailing surface/leading surface compared to the standard k model. And this tendency would be increased with the increased .(2) The simulation performance of the standard k model was well on the leading surface.However, on the trailing surface it under-predicted the heat transfer at high rotating speed. (3) The calculation results of the new anisotropic k model with =0.1 proposed by the present paper agreed well with experimental data, both on the leading and trailing surfaces. Besides, compared to 1, 0.1 is a more appropriate magnitude of  at conditions in the present paper.

show abstract

“…No comparisons were made with experimental data in either of these studies. Prakash and Zerkle [8] analyzed the flow in radially rotating ducts using the PHOENICS code. Detailed velocity vectors were presented under a number of flow conditions; severe radial flow reversal was observed at high rotational speeds.…”

Section: Literature Reviewmentioning

confidence: 99%

Calculation of Heat Transfer in a Radially Rotating Coolant Passage

Tolpadi

1994

Numerical Heat Transfer, Part A: Applications

View full text Add to dashboard Cite

The three-dimensional flow field and heat transfer in a radially rotating coo/anl passage are studied numerically, The passage chosen has a square cross section with smooth isothermal walls of finite length. The axis of rotation is normal to the flow direction with the flow rndially outward. The effects of Coriolis forces, centrifugal buoyancy, and fluid Reynolds number on the flow and heat transfer hove all been considered. The analysis has been performed by using a fully eUiptic, three-dimensional, body-fitted computational fluid dynamics code based on pressure correction techniques. The numerical technique employs a mulJigrid iterative solution procedure and the stondard k -e turbulence model for both the hydrodynamics and heat transfer. The effecl of rotation is included by considering the governing equations of motion in a relative frame of reference /hot moues with the passage.The consequence of rotation is to bring higher velocity fluid fram the core to the trailing surface, thereby increasing both the friction and heat transfer at this face. At the same time, the heat transfer is predicted to decrease along the leading surface. The effect ofbuoyaney is to increase the rndial velocity of the fluid, thus generally increasing the heat transfer along both the leading and trailing surfaces. These effects and trends /hot hove been predicted are in agreement with experimental heat transfer data available in the literature 0,21. The quantitative agreement with the data was also found to be quite satisfactory.

show abstract

Prediction of Turbulent Flow and Heat Transfer in a Radially Rotating Square Duct

Cited by 91 publications

References 15 publications

Experimental study of thermal development in a rotating square-ended U-bend

Experimental study of thermal development in a rotating square-ended U-bend

Computational research on rotating channel by a modified anisotropic turbulence model

Calculation of Heat Transfer in a Radially Rotating Coolant Passage

Contact Info

Product

Resources

About