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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

TOPOLOGY AND TRANSPORT CHARACTERISTICS IN A TURBULENT TWO-CYLINDER WAKE

pages 259-264
DOI: 10.1615/TSFP2.430
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SINOPSIS

This work aims to study experimentally the turbulent flow topology (vortex patterns), heat and momentum transport in the wake of two side-by-side circular cylinders. Spacing T between the cylinder axes was varied from 1.5d to 3d (d is the cylinder diameter). At T/d = 1.5, the phase-averaged velocity and temperature fields display a single vortex street. The two rows of vortices exhibit a great difference in the maximum vorticity and size and are asymmetrical in the lateral location with respect to the flow centreline. As T/d increases to 3.0, the flow is totally different. Two inphase streets occur initially. They are less stable, with vortices weakening faster, than the street at T/d = 1.5. By x/d = 40, one street only is identifiable. The momentum and heat transport characteristics of the flow are discussed by examining the coherent and incoherent momentum and heat flux vectors.

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