Numerical Study of Subcritical Flow With Fluid Injection
It is suggested that the study of synthetic flows, where controlled experiments can be performed, is useful in understanding turbulent flow structures. The early states of formation of hairpin structures in shear flows and the subsequent evolution of these structures is studied through numerical simulations, by developing full-time dependant three-dimensional flow solution of an initially laminar (subcritical) flow in which injection of fluid through a narrow streamwise slot from the bottom wall of a plate is carried out. Details of the numerical approach and significance of the present findings are reported in this work.
KeywordsVortex Platinum Propa Vorticity Shoe
Unable to display preview. Download preview PDF.
- Tu, B. J. and Willmarth, W. W.: An experimental study of turbulence near the wall through correlation measurements in a thick turbulent boundary layer, Tech. Report No. 02920–3-T, Dept. Aerospace Eng., University of Michigan, 1966.Google Scholar
- Blackwelder, R. F. and Kaplan, R. E.: Intermittent structures in turbulent boundary layers, AGARD Conf. Proc., 43, Sec. 5.1–5.7, 1971.Google Scholar
- Smith, C. R.: Visualization of turbulent boundary layer structure using a moving hydrogen bubble wire probe, Lehigh Workshop on Coherent Structure in Turbulent Boundary Layers, ed. C. R. Smith and D. E. Abbott, pp. 48–97, 1978.Google Scholar
- Danberg, J. E.: On feasibility of a vortex model of the turbulent boundary layer burst phenomena, T-R-No. 208, Dept. of Me-chanical and Aerospace Eng., University of Delaware, Newark, 1977.Google Scholar
- Brodkey, R. S. and Wallace, J. M.: The Delta Conferences, NSF Project Report, The Ohio State Research Foundation, Columbus, OH, 1982.Google Scholar
- Doligalski, T. L., Smith, C. R., and Walker, J. D. A.: A production mechanism for turbulent boundary layers, in Viscous Drag Reduction, ed. G. Hough, Prog. Astro. Aero., 72, pp. 47–72, 1980.Google Scholar
- Kastrinakis, E. G., Nychas, S. G., and Echelman, H.: Some streamwise vorticity characteristics of coherent structures, Structure of complex turbulent shear flow, IUTAM Symposium, ed. R. Dumas, L. Fulachier, pp. 31–40, 1983.Google Scholar
- R. Balasubramanian: “Patchwork” - A computer algorithm for complex flows, Spectrex Report 88–04, 1988.Google Scholar
- R. Balasubramanian and S. A. Orszag: Numerical simulation of shear flows over wavy boundaries, in Viscous Flow Drag Reduction, ed. G. R. Hough, Progress in Astro, and Aeronautics, 72, pp. 391–409, 1980.Google Scholar
- R. Balasubramanian: Vortex - LEBU interactions in subcritical Synthetic Flows, AIAA Paper No. 89–1012, Presented at 2nd Shear Flow Control Conference, Tempe, AZ, March 1989.Google Scholar