Particle mixing and diffusion in the turbulent wake of cylinder arrays

✍ Scribed by J. K. Helgesen; M. J. Matteson

• Publisher: Springer
• Year: 1991
• Tongue: English
• Weight: 674 KB
• Volume: 10
• Category: Article
• ISSN: 0723-4864
• DOI: 10.1007/bf00190249

✦ Synopsis

The collection of 10 p. DOP droplets from an aerosol flow Subscripts around an array of five circular cylinders in a turbulent air stream c was measured. Axial and angled alignments of the target array, normal to the flow, were examined. Cylinder Reynolds numbers 9 M ranged from 1,300 to 5,100, and effective Stokes numbers from 0.50 to 1.58. A continuous line source turbulent diffusion model was used P 0 with the centerline velocity and concentration distributions to derive the eddy diffusion coefficients for momentum and particle on concentration in the near wake of the cyinders. Angled collection 1, n results showed an optimal target alignment at the edge of the momentum wake of the lead cylinder. Further examination with an LDA system suggests the peak in collection is due to a particle velocity surplus in the wake. * To whom correspondence should be addressed cylinder gas momentum particles theoretical (Stokes efficiency) freestream value cylinder rank 1 or n