# Flow through a Staggered Tube bundle

*Authors: Moulinec et al.*
*Type: Numerical*

*Status*:

## Contents

Description
Flow Parameters

Reference Publications

Results

## Description

Direct numerical simulation (DNS) of a turbulent flow through a staggered tube bundle
Simulations of the flow through a tube bundle are carried out at Re=6000 on four different meshes with various grid spacings. Results of the simulations on the finest mesh are compared with the experimental data of Simonin and Barcouda
If we compare the flow around a single tube in the tube bundle with the uniform flow around a single cylinder in an unobstructed domain, we find that for the former the oncoming flow is strongly non-uniform. This is caused by the flow distortion due to the neighboring tubes. At the start of the tube bundle the approaching flow is uniform but becomes distorted after the first row of tubes. After the third or fifth row of tubes in case of a staggered bundle, the flow can be considered to be fully developed (Meyer, 1994), where the exact number of rows depends on the distance between the tubes. Here, fully developed means that the flow is periodic both in the X and Y-direction with a periodicity equal to the separation distance between two neighboring tubes horizontally or vertically aligned. Simonin and Barcouda (1986), for instance, assume that the flow in their configuration is fully developed after the fourth row and carry out their measurements at this location.

## Flow Parameters

The Reynolds number of experiments is Re=18,000 based on the diameter D and on the bulk velocity. The DNS simulations were carried out at a Reynolds of Re = 6000.
(Vb=3.4×10-2 m/s nu=1.28×10-6 m2/s).
The diameter of the tube is taken equal to D=21.7 mm and the separation distance L=45 mm as in the Simonin and Barcouda experiment (Simonin and Barcouda, 1986). For the domain length in the spanwise direction they choose one tube diameter D

### Additional information (links, pictures, etc.)

- tube bundle description:

## Reference Publications

- C. Moulinec; M. J. B. M. Pourquié; B. J. Boersma; T. Buchal; F. T. M. Nieuwstadt Direct Numerical Simulation on a Cartesian Mesh of the Flow through a Tube Bundle. International Journal of Computational Fluid Dynamics, Volume 18, Issue 1 January 2004 , pages 1 - 14
- Simonin, O. and Barcouda, M. (1986) Measurements of fully developed turbulent flow across tube bundle. In 3ème Conférence Internationale sur les Applications de l'Anéemometrie Laser à la Mécanique des Fluides.
- Rollet-Miet, P., Laurence, D. and Ferziger, J. (1999) LES and RANS of turbulent flow in tube bundles. Int. J. Heat Fluid Flow 20 , pp. 241-254

## Results

Simulation results available for this case:

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