LES, coarse LES, and transient RANS comparisons on the flow across a tube bundle

Benhamadouche, Sofiane; Laurence, Dominique

doi:10.1016/s0142-727x(03)00060-2

Cited by 107 publications

(69 citation statements)

References 11 publications

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“…The accelerated flow due to the strongly flapping pattern of the unsteady wake flow behind the cylinder(s) is the reason. As indicated by Benhamadouche and Laurence, 8) the finer results can be revealed by 3D simulation but at the expense of computational intensity. stress profiles relative to the work reported by Johnson, and as compared with the experimental benchmark provided by Simonin and Barcouda.…”

Section: Benchmarking Urans With Second-order Turbulence Models (1) Fmentioning

confidence: 90%

“…This ''flapping'' flow pattern from implementing RSM with a nonlinear pressure strain model is different from the linear model in its characterization of the vortex shedding. 8) The up and down flapping flow pattern generated by vortex shedding strongly influences the mainstream flow. The flow accelerating in the region between the wake and the cylinder narrows as it moves down, in proximity of the cylinder.…”

Section: Benchmarking Urans With Second-order Turbulence Models (1) Fmentioning

confidence: 99%

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Benchmark Simulation of Turbulent Flow through a Staggered Tube Bundle to Support CFD as a Reactor Design Tool. Part II: URANS CFD Simulation

Ridluan

Tokuhiro

2008

Journal of Nuclear Science and Technology

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In Part II, we described the unsteady flow simulation and proposed a modification of a traditional turbulence flow model. Computational fluid dynamics (CFD) simulations of an isothermal, fully periodic flow across a tube bundle using unsteady Reynolds averaged Navier-Stokes (URANS) equations, with turbulence models such as the Reynolds stress model (RSM) were investigated at a Reynolds number of 1:8 Â 10 4 , based on the tube diameter and inlet velocity. As noted in Part I, CFD simulation and experimental results were compared at five positions along (x; y) coordinates. The steady RANS simulation showed that four diverse turbulence models were efficient for predicting the Reynolds stresses, and generally, SRANS results were marginal to poor, using a consistent evaluation terminology. In the URANS simulation, we modeled the turbulent flow field in a manner similar to the approach used for large eddy simulation (LES). The time-dependent URANS results showed that the simulation reproduces the dynamic stability as characterized by transverse oscillatory flow structures in the near-wake region. In particular, the inclusion of terms accounting for the time scales associated with the production range and dissipation rate of turbulence generates unsteady statistics of the mean and fluctuation flow. In spite of this, the model implemented produces better agreement with a benchmark data set and is thus recommended.

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Section: Benchmarking Urans With Second-order Turbulence Models (1) Fmentioning

confidence: 90%

Section: Benchmarking Urans With Second-order Turbulence Models (1) Fmentioning

confidence: 99%

Benchmark Simulation of Turbulent Flow through a Staggered Tube Bundle to Support CFD as a Reactor Design Tool. Part II: URANS CFD Simulation

Ridluan

Tokuhiro

2008

Journal of Nuclear Science and Technology

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“…The Simonin and Barcouda data are available on the ERCOFTAC database a . The data are provided for comparing turbulence model results and have been used for comparison with numerical simulations (e.g., Benhamadouche and Laurence [2003], Rollet-Miet, et al [1999], Hassan and Barsamian [2004], and Moulinec, et al [2004]). …”

Section: Flow Phenomena In the Lower Plenummentioning

confidence: 99%

Investigations of the Application of CFD to Flow Expected in the Lower Plenum of the Prismatic VHTR

Johnson¹,

Gallaway²,

Guillen³

2006

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“…Both LES and k-İ models calculate the mean velocity profiles reasonably well while k-İ model gives poor predictions of the Reynolds stresses in the wake region inconsistency to the LES results. Benhamadouche et al [7] compute the cross-flow in a staggered tube bundle with LES and a transient Reynolds Stress Transport Models (RSTM) in 2D and 3D configurations with two levels of grid refinement. It is shown that the LES results on the fine mesh are comparable to the DNS and the experiment and reasonable agreement is still achieved with a coarse mesh.…”

Section: Introductionmentioning

confidence: 99%

On the use of the periodicity condition in cross-flow tube

Beladjine

Aounallah

Belkadi

et al. 2015

EPJ Web of Conferences

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Abstract. This paper presents the results of measurements and numerical predictions of turbulent cross-flow through an in-line 7×7 bundle configuration with a constant transverse and longitudinal pitch-to-diameter ratio of 1.44. The experiments are conducted to measure the pressure around tubes, using DPS differential pressure scanner with air flow, in square channel at a Reynolds number of 35000 based on the gap velocity and the tube diameter. The commercial ANSYS FLUENT is used to solve the unsteady Reynolds-Averaged Navier-Stokes (RANS) equations. The primary aim of the present study is to search for a turbulent model that could serve as an engineering design tool at a relatively low computational cost. The performances of the Spalart-Allmaras, the RNG k-İ, the Shear Stress Transport k-Ȧ and the second moment closure RSM models are evaluated by comparing their simulation results against experimental data. The second objective is to verify the validity of the periodicity assumption taken account in the most previous numerical works by considering the filled bundle geometry. The CFD results show that the Spalart-Allmaras model on the fine mesh are comparable to the experiments while the periodicity statement did not produce consistently the flow behavior in the 7×7 tube bundle configuration.

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LES, coarse LES, and transient RANS comparisons on the flow across a tube bundle

Cited by 107 publications

References 11 publications

Benchmark Simulation of Turbulent Flow through a Staggered Tube Bundle to Support CFD as a Reactor Design Tool. Part II: URANS CFD Simulation

Benchmark Simulation of Turbulent Flow through a Staggered Tube Bundle to Support CFD as a Reactor Design Tool. Part II: URANS CFD Simulation

Investigations of the Application of CFD to Flow Expected in the Lower Plenum of the Prismatic VHTR

On the use of the periodicity condition in cross-flow tube

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