The effect of particles on fluid turbulence in a turbulent boundary layer over a cylinder
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Abstract
The turbulent fluid and particle interaction in the turbulent boundary layer for cross flow over a cylinder has been experimentally studied. A phase-Doppler anemometer was used to measure the mean and fluctuating velocities of both phases. Two size ranges of particles (30μm–60μm and 80μm–150μm) at certain concentrations were used for considering the effects of particle sizes on the mean velocity profiles and on the turbulent intensity levels. The measurements clearly demonstrated that the larger particles damped fluid turbulence. For the smaller particles, this damping effect was less noticeable. The measurements further showed a delay in the separation point for two phase turbulent cross flow over a cylinder.
Key Words
turbulent fluid and particle interaction two-phase turbulent cross flow over a cylinder boundary layer PDA measurementPreview
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References
- 1.Grass AJ. Transport of fine sand on a flat bed: turbulence and suspension mechanics. In: Proc Euromech, Tech Univ of Denmark, Copenhagen, 1974, 48: 33Google Scholar
- 2.Sumer BM, Deigaard R. Particle motions near the bottom in turbulent flow in an open channel: Part 2.J Fluid Mech, 1981, 109: 311–337CrossRefGoogle Scholar
- 3.Rashidi M, Hetsroni G, Banerjee S. Particle-turbulence interaction in a boundary layer.Int J Multiphase Flow, 1990, 16: 935–949CrossRefGoogle Scholar
- 4.Rogers CB, Eaton JK. The effect of small particles on fluid turbulence in a flat-plate, turbulent boundary layer in air.Phys Fluids, 1991, A 3: 928–937CrossRefGoogle Scholar
- 5.Lee SL, Durst F. On the motion of particles in turbulent duct flows.Int J Multiphase Flow, 1982, 8: 125–146CrossRefGoogle Scholar
- 6.Murray DB. The effect of solid particles on cross flow heat transfer: [Ph D dissertation]. University of Dublin, Ireland, 1989Google Scholar
- 7.Gore RA, Crowe CT. Effect of particle size on modulating turbulence intensity.Int J Multiphase Flow, 1989, 15: 279–285CrossRefGoogle Scholar
- 8.Hetsroni G. Particles-turbulence interaction.Int J Multiphase Flow, 1989, 15: 735–746CrossRefGoogle Scholar
- 9.Tsuji Y, Morikawa Y, Shiomi H. LDV measurements of an air-solid two-phase flow in a vertical pipe.J Fluid Mech, 1984, 139: 417–434CrossRefGoogle Scholar
- 10.Achenbach, E. Vortex shedding from spheres.J Fluid Mech, 1974, 62: 209–221.CrossRefGoogle Scholar