TWiki> CfdTm Web>TestCaseAddNew>TestCase057 (2012-04-17, HakimSemai)

# Flow through a staggered tube bundle (FEDORA)

Authors: Simonin and Barcouda

Type: Analytical

Status:   Description

## Description

Experimental study of a turbulent flow through a staggered tube bundle Simulations of the flow through a tube bundle are carried out at Re=18000 (Simonin and Barcouda, 1986). 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 neighbouring tubes. Four different regions can be identified (see Fig. 1): compression, acceleration, expansion and recirculation. Up stream of the stagnation point, there is a compression area, which is followed by an acceleration of the fluid due to a restriction of the passage. The sudden enlargement of the channel generates a slow down of the flow and an adverse pressure gradient, which generates a recirculation area behind the cylinder. Fig. 1: Characterisation of the flow field

## Geometry definition

The geometrical configuration of the experiment is presented in Fig. 2. The assembly is composed by seven rows, each one composed by ten or eleven rods arranged within a staggered pattern. The geometry presents the following parameters:
• Length of the domain %$L=180\,mm$%
• Width of the domain %$500\,mm$%
• Pitch %$P=45\,mm$%
• Diameter of the rod %$D=21.7\,mm$% Fig. 2: Experimental geometry

## Flow Parameters

The flow parameters are the following

• Dynamic viscosity: %$\mu=8.904\cdot10^{-4}\, kg\, m^{-1}\, s^{-1}$%
• Density : %$\rho=9.972\cdot10^2\,kg/m^3$%
• Reynolds number : %$Re=1.8\cdot10^{4}$%

At the level of the domain inlet, we use a velocity profile based on the measures. The data are transcribed in the table 1 below:

 X direction %$~~\bar{V}_z~~$% %$~~\bar{V}_x~~$% %$~~V'_z~~$% %$~~V'_x~~$% %$(m)$% %$(m/s)$% %$(m/s)$% %$(m/s)$% %$(m/s)$% %$~~~~0.00$% %$1.1209$% %$-0.015$% %$0.00398$% %$0.00365$% %$~~~~2.10^{-3}$% %$1.1528$% %$-0.0386$% %$0.00375$% %$0.00344$% %$~~~~4.10^{-3}$% %$1.1595$% %$-0.0630$% %$0.00357$% %$0.00327$% %$6.10^{-3}$% %$1.0445$% %$-0.0873$% %$0.00397$% %$0.00364$% %$8.10^{-3}$% %$1.1293$% %$-0.1171$% %$0.00403$% %$0.00369$% %$10.10^{-3}$% %$1.1404$% %$-0.1287$% %$0.00382$% %$0.00350$% %$12.10^{-3}$% %$1.1062$% %$-0.1186$% %$0.00395$% %$0.00362$% %$14.10^{-3}$% %$1.0777$% %$-0.1154$% %$0.00382$% %$0.00350$% %$16.10^{-3}$% %$1.0422$% %$-0.0946$% %$0.00362$% %$0.00332$% %$18.10^{-3}$% %$0.9841$% %$-0.0694$% %$0.00398$% %$0.00365$% %$20.10^{-3}$% %$0.9728$% %$-0.0454$% %$0.00371$% %$0.00340$% %$22.10^{-3}$% %$0.9415$% %$-0.0157$% %$0.00400$% %$0.00367$% %$24.10^{-3}$% %$0.9332$% %$~ 0.0356$% %$0.00383$% %$0.00351$% %$26.10^{-3}$% %$0.9429$% %$~0.0599$% %$0.00387$% %$0.00355$% %$28.10^{-3}$% %$0.9471$% %$~0.0977$% %$0.00381$% %$0.00349$% %$30.10^{-3}$% %$0.9837$% %$~0.1071$% %$0.00354$% %$0.00324$% %$32.10^{-3}$% %$0.9783$% %$~0.1231$% %$0.00382$% %$0.00314$% %$34.10^{-3}$% %$1.0354$% %$~0.1041$% %$0.00335$% %$0.00307$% %$36.10^{-3}$% %$1.0779$% %$~0.0946$% %$0.00349$% %$0.00320$% %$38.10^{-3}$% %$1.1251$% %$~0.0760$% %$0.00351$% %$0.00322$% %$40.10^{-3}$% %$1.1371$% %$~0.0534$% %$0.00335$% %$0.00307$% %$42.10^{-3}$% %$1.1682$% %$~0.0279$% %$0.00365$% %$0.00335$% %$44.10^{-3}$% %$1.1886$% %$-0.0030$% %$0.00482$% %$0.00441$% %$46.10^{-3}$% %$1.1761$% %$-0.0331$% %$0.00366$% %$0.00336$%
Table 1 - Water inlet conditions.

## Reference Publications

1. Simonin, O. and Barcouda, M. (1986) Measurements of fully developed turbulent flow across tube bundle. In 3rd Conference Internationale sur les Applications de l'Anemometrie Laser a  la Mecanique des Fluides.

## Results

Simulation results available for this case:
Code Version Author Restrictions
Code_Saturne 2.0-beta2 D. Sénéchal AccessEDFGroup
Number of topics: 1

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I Attachment Action Size Date Who Comment png caract.png manage 4.1 K 2010-12-09 - 15:07 JuanUribe Fedora flow description png expe_mod.png manage 5.0 K 2010-12-09 - 15:08 JuanUribe Fedora exp configuration
Topic revision: r9 - 2012-04-17 - 14:45:37 - HakimSemai
CfdTm Web
06 Dec 2019

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