Detached eddy simulation of flow and heat transfer in fully developed rotating internal cooling channel with normal ribs

Viswanathan, Aroon K.; Tafti, Danesh K.

doi:10.1016/j.ijheatfluidflow.2005.12.003

Cited by 43 publications

(30 citation statements)

References 47 publications

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“…by Elfert et al [2] and from DES simulations, as e.g. by Viswanathan and Tafti [12], but we argue that a systematic discussion helps in understanding the flow features that are important for enhancing heat transfer in ribbed rotating ducts.…”

Section: Introductionmentioning

confidence: 62%

“…They found that the peak values of the turbulent kinetic energy differ by a factor of two in the boundary layers on the suction and pressure sides of the channel and that the amplitude of the small-scale fluctuations close to the pressure side changes significantly with the rotational speed. The LES data of Abdel-Wahab and Tafti [11] were used by Viswanathan and Tafti [12,13] as reference data for testing a hybrid RANS/LES turbulence model of DES-type (Detached Eddy Simulation), based on the k-ω SST model. They showed that the DES results are quite close to the LES results, although the grid for DES was a factor of 2 coarser in each direction.…”

Section: Introductionmentioning

confidence: 99%

“…Coletti et al [7] observed that the Coriolis force affects the dynamics of both large and small scales, leading to complicated flow patterns with recirculation zones and secondary vortex motions. As discussed above, the applicability of a hybrid RANS/LES technique of DES type to flow in a ribbed rotating duct was already investigated by Viswanathan and Tafti [12,13], but comparison was made with LES results. Since LES involves modelling, we argue that it has added value to compare with high-quality experimental data.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simulation of the Flow in a Ribbed Rotating Duct with a Hybrid k-ω RANS/LES Model

Kubacki

Rokicki

Dick

2015

Flow Turbulence Combust

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Section: Introductionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simulation of the Flow in a Ribbed Rotating Duct with a Hybrid k-ω RANS/LES Model

Kubacki

Rokicki

Dick

2015

Flow Turbulence Combust

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“…Additionally several studies by Vishwanathan and Tafti [112,115,117], Liu et al [56] and Kubacki et al [47] successfully implemented hybrid based methods to predict the turbulent and mean flow features in stationary, rotating and roughened ribbed ducts -all documenting reasonable success.…”

Section: Internal Cooling Ductsmentioning

confidence: 95%

A Review of Embedded Large Eddy Simulation for Internal Flows

Holgate

Skillen

Craft

et al. 2018

Arch Computat Methods Eng

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When scale-resolving simulation approaches are employed for the simulation of turbulent flow, computational cost can often be prohibitive. This is particularly true for internal wall-bounded flows, including flows of industrial relevances which may involve both high Reynolds number and geometrical complexity. Modelling the turbulence induced stresses (at all scales) has proven to lack requisite accuracy in many situations. In this work we review a promising family of approaches which aim to find a compromise between cost and accuracy; hybrid RANS-LES methods. We place particular emphasis on the emergence of embedded large eddy simulation. These approaches are summarised and key features relevant to internal flows are highlighted. A thorough review of the application of these methods to internal flows is given, where hybrid approaches have been shown to offer significant benefits to industrial CFD (relative to an empirical broadband modelling of turbulence). This paper concludes by providing a cost-analysis and a discussion about the emerging novel use-modalities for hybrid RANS-LES methods in industrial CFD, such as automated embedded simulation and multi-dimensional coupling.

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“…The use of the one equation SA model, allows to save computational resources when complex three-dimensional domains are considered and also offers the possibility to switch to a Detached Eddy Simulation (DES) scheme. The DES option attempts to combine the best features of RANS and LES (Viswanathan and Tafti, 2006;Hasse et al, 2009;Paik et al, 2009), and represents a future development of this work. Such a hybrid approach reduces to RANS near solid boundaries and to LES away from the wall and is very promising for fully three-dimensional studies of pollutants dispersion modelling in urban areas.…”

Section: Numerical Modelling Of Ufps Distribution Inside Street Canyonsmentioning

confidence: 99%

Numerical Simulation of Ultrafine Particle Dispersion in Urban Street Canyons with the Spalart-Allmaras Turbulence Model

Scungio

Arpino

Stabile

et al. 2013

Aerosol Air Qual. Res.

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The increased traffic emissions and reduced ventilation of urban street canyons lead to the formation of high particle concentrations as a function of the related flow field and geometry. In this context, the use of advanced modelling tools, able to evaluate particle concentration under different traffic and meteorological conditions, may be helpful.In this work, a numerical scheme based on the non-commercial fully explicit AC-CBS algorithm, and the one-equation Spalart-Allmaras turbulence model, was developed to perform numerical simulations of fluid flow and ultrafine particle dispersion in different street canyon configurations and under different wind speed and traffic conditions. The proposed non-commercial numerical tool was validated through a comparison with data drawn from the scientific literature.The results obtained from ultrafine particle concentration simulations show that as the building height increases the dispersion of particles in the canyon becomes weaker, due to the restricted interaction between the flow field in the street canyon and the undisturbed flow. Higher values of approaching wind speed facilitate the dispersion of the particles. The traffic effect has been evaluated by imposing different values of particles emission, depending on the vehicles type, with the lowest concentration values obtained for the Euro 6 vehicles, and the highest for High Duty Vehicles. A parametric analysis was also performed concerning the exposure to particles of pedestrians in different positions at the road level as a function of street canyon geometry, traffic mode, and wind speed. The worst exposure (1.25 × 10 6 part./cm 3 ) was found at the leeward side for an aspect ratio H/W = 1, wind speed of 5 m/s when High Duty Vehicles traffic was considered.

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Detached eddy simulation of flow and heat transfer in fully developed rotating internal cooling channel with normal ribs

Cited by 43 publications

References 47 publications

Simulation of the Flow in a Ribbed Rotating Duct with a Hybrid k-ω RANS/LES Model

Simulation of the Flow in a Ribbed Rotating Duct with a Hybrid k-ω RANS/LES Model

A Review of Embedded Large Eddy Simulation for Internal Flows

Numerical Simulation of Ultrafine Particle Dispersion in Urban Street Canyons with the Spalart-Allmaras Turbulence Model

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