JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Numerical Study of Turbulent Flow Around a Rotating Cylinder with Surface Roughness
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Numerical Study of Turbulent Flow Around a Rotating Cylinder with Surface Roughness
Yang, Kyung-Soo; Hwang, Jong-Yeon; Kim, Young-Wan;
  PDF(new window)
 Abstract
Erosion-corrosion in a pipe system often occurs at fittings, valves, and weld beads where flow separation and reattachment yield high turbulence intensity. Thus identifying their correlations would be the first step towards resolving the erosion-corrosion problems associated with industrial applications. Bremhorst of the Univ. of Queensland, Australia, proposed that a rotating cylinder with surface roughness (two backward-facing steps periodically mounted on a circular cylinder) be an economical and tractable tool which can generate extreme flow conditions for erosion-corrosion study. In this work, DNS has been carried out for turbulent flows around the same rotating cylinder as his experimental apparatus. Our result shows that a region of intense turbulence intensity and high wall-shear stress fluctuation is formed along the cylinder surface in the recirculating region behind the step, where high mass-transfer capacity is also experimentally observed. Since corrosion is mass-transfer controlled, our finding sheds light on the direction of future corrosion research.
 Keywords
Direct Numerical Simulation;Corrosion;Erosion;Reattachment;Turbulence Intensity;
 Language
Korean
 Cited by
 References
1.
Postlethwaite, J., Dobbin, M. H., and Bergevin, K., 1986, 'The Role of Oxygen Mass Transfer in the Erosion-Corrosion of Slurry Pipelines,' Corrosion, Vol. 42, pp. 514-521

2.
Mahato, B. K., Voora, S. K., and Shemilt, L. W., 1968, 'Steel Pipe Corrosion Under Flow Conditions - I. An Isothermal Correlation for a Mass Transfer Model,' Corros. Sci., Vol. 8, pp. 173-193 crossref(new window)

3.
Nesic, S., and Postlethwaite, J., 1990, 'Relationship Between the Structure of Disturbed Flow and Erosion-Corrosion,' Corrosion, Vol. 46, No. 11, pp. 874-880

4.
Silverman, D. C., 1988, 'Rotating Cylinder Electrode - Geometry Relationships for Prediction of Velocity-Sensitive Corrosion,' Corrosion-NACE, Vol. 44, No. 1, pp. 42-49

5.
Bremhorst, K., 1997, Personal Communication

6.
Lezius, D. K., and Johnston, J. P., 1976, J. Fluid Mech., Vol. 77, pp. 153 crossref(new window)

7.
Rosenfeld, M., Kwak, D. and Vinokur, M., 1991, 'A Fractional Step method for the Unsteady Incompressible Navier-Stokes Equations in Generalized Coordinate Systems,' J. Comp. Physics., Vol. 94, pp. 102-137 crossref(new window)

8.
Bienkowski, J., 1998, Personal Communication

9.
Tennekes, H., and Lumley, J.L. 1972, 'A First Course in Turbulence.' The MIT Press