The subcritical flow over an array of elliptic cylinders with an axis ratio of 1:2 was studied both experimentally and numerically. The mean velocities, turbulence levels and the vortex dynamics of the array were determined experimentally by flow visualization and using a laser Doppler anemometer (LDA) and the flow was modelled using three-dimensional large eddy simulation (LES). The experimental results were compared with results obtained previously using circular cylinders and with numerical predictions of the flow. The study indicated that the flow past such a widely spaced array is characterized by low turbulence levels and poor lateral mixing compared with conventional circular cylinder arrays, and a weak flow periodicity with a constant Strouhal number of 0.11 was detected in downstream rows. The predicted mean and r.m.s. velocities, as well as the flow periodicity, were in good agreement with the experimental results.
BourisD.PapadakisG.BergelesG.Numerical evaluation of alternate tube configurations for particle deposition rate reduction in heat exchanger tube bundles. Int. J. Heat Fluid Flow, 2001, 22, 525–536.
2.
ModiV. J.DikshitK.Near-wakes of elliptic cylinders in subcritical flow. Am. Inst. Aeronaut. Astronaut. J., 1974, 13(4), 490–497.
3.
ModiV. J.WilandE.Unsteady aerodynamics of stationary cylinders in subcritical flow. Am. Inst. Aeronaut. Astronaut. J., 1970, 8(10), 1814–1821.
4.
OtaT.AibaS.TsurutaT.KagaM.Forced convection heat transfer from an elliptic cylinder of axis ratio 1: 2. Bull. Jap. Soc. Mech. Engrs, 1983, 26(212), 262–267.
5.
OtaT.NishiyamaH.TaokaY.Heat transfer and flow around an elliptic cylinder. Int. J. Heat Mass Transfer, 1984, 27(10), 1771–1779.
6.
KondjoyanA.DaudinJ. D.Effects of free stream turbulence intensity on heat and mass transfers at the surface of a circular cylinder and an elliptical cylinder, axis ratio 4. Int. J. Heat Mass Transfer, 1995, 38(10), 1735–1749.
7.
MittalR.BalachandarS.Direct numerical simulation of flow past elliptic cylinders. J. Comput. Phys., 1996, 124, 351–367.
WallisPendennis R.A photographic study of fluid flow between banks of tubes. Proc. Instn Mech. Engrs, 1939, 142, 379–387.
10.
OtaT.NishiyamaH.KominamiJ.SatoK.Heat transfer from two elliptic cylinders in tandem arrangement. J. Heat Transfer, 1986, 108, 525–531.
11.
MerkerG. P.HankeH.Heat transfer and pressure drop on the shell-side of tube-banks having oval-shaped tubes. Int. J. Heat Mass Transfer, 1986, 29(12), 1903–1909.
12.
MerkerG. P.HankeH.Measurements of local mass transfer coefficients and pressure distribution along the shell-side of oval-shaped tubes in cross flow heat exchangers. In Proceedings of 8th International Heat Transfer Conference, San Francisco, California, 1986, Vol. 6, pp. 2721–2726.
13.
LiQ.ChenZ.FlechtnerU.WarneckeH. J.Wärmeübergang und Druckverlust auf der Außenseite in fluchtend angeordneten Rohrbündeln mit ellipsoiden Rohren. Chem. Technik, 1997, 49, 183–185.
14.
LaurenceD.Applications of Reynolds averaged Navier-Stokes equations to engineering problems. In Lecture Series 1997–03 on Introduction to the Modelling of Turbulence, 1997 (Von Karman Institute for Fluid Dynamics, Belgium).
15.
Rollet-MietP.LaurenceD.FerzigerJ.LES and RANS of turbulent flow in tube bundles. Int. J. Heat Fluid Flow, 1999, 20, 241–254.
16.
KonstantinidisE.CastigliaD.PapadakisG.BalabaniS.Vortex lock-on phenomena due to pulsating flow in tube arrays. In Proceedings of 10th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 2000.
17.
BalabaniS.YianneskisM.An experimental study of the mean flow and turbulence structure of cross-flow over tube bundles. Proc. Instn Mech. Engrs, Part C, Journal of Mechanical Engineering Science, 1996, 210(C4), 317–331.
18.
BalabaniS.An experimental investigation of the cross-flow over tube bundles. PhD thesis, King's College London, University of London, 1996.
19.
SmagorinskyJ.General circulation experiments with the primitive equations. I. The basic experiment. Monthly Weather Review, 1963, 91, 99–164.
20.
LillyD.The representation of small scale turbulence in numerical simulation experiments. In Proceedings of IBM Scientific Computing Symposium on Environmental Sciences (Ed. GoldstineH. H.), IBM Form 320–1951, Yorktown Heights, USA, 1967, pp. 195–210.
21.
CrankJ.NicholsonP.A practical method for numerical evaluation of solutions of partial differential equations of the heat conduction type. Proc. Comb. Phil. Soc., 1947, 43(50), 50–67.
22.
NishimuraT.ItohH.MiyashitaH.The influence of tube layout on flow and mass transfer characteristics in tube banks in the transitional flow regime. Int. J. Heat Mass Transfer, 1993, 36(3), 553–563.
23.
KonstantinidisE.CastigliaD.BalabaniS.YianneskisM.On the velocity and vortex shedding characteristics of an in-line tube bundle in steady and pulsating cross-flow. Chem. Eng. Res. Des., Trans. Inst. Chem. Engrs, 2000, 78(A8), 1129–1138.
