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Scientific-technical journal

Abstract

The article presents the results of a numerical study of the flow structure in a flat channel in the zone of its sudden expansion in the form of a ledge. The calculations are based on the numerical solution of a system of non-stationary equations using Navier-Stokes. The results of the longitudinal velocity profiles in various sections of the channel after the ledge are obtained. For the difference approximation of the initial equations, the control volume method was used, and the relationship between velocities and pressure was found using the SIMPLE procedure. For the numerical solution of this problem, the McCormack scheme was applied. The results were compared with experimental data.

First Page

39

Last Page

43

References

[1]. Blasius Н. Laminare Stromung in Kanalen Wecselnder Briete, Zeitschrift filer Mathematik und Physik. 10. p. 225. (1910)

[2]. Honji H. The starting flow down a step, J. Fluid Mech, 69(2).pp. 229-240. (1975)

[3]. Sinha S. P., Gupta A. K., Oberai M. M. Laminar tear-off flow around ledges and caverns, Rocket technology and cosmonautics, 19(12), pp. 33-37.(1981)

[4]. Armaly В. F., Durst F., Pereira J. С. F., Schonung В. Experimental and theoretical investigation of backward-facing stap flow, J. Fluid Mech, 127. pp. 473-496.(1983)

[5]. Zheng P. Detached currents. - M.: Mir. 2. P,354. (1973)

[6]. Gogish L. V., Stepanov G. Yu. Turbulent detached flows. - M.: Nauka, 368 p. (1979)

[7]. Le П., Moin P., Kim J. Direct numerical simulation of turbulent flow a backward-facing stap ,J. Fluid Mech. 330. pp. 349-374. (1997)

[8]. Durst F., Melling A., Whitelow J.H. Low Reynolds Number Flow-over a Plane Symmetric Sudden Expansion, J. Fluid Mech. 64(1). pp. 111-118.(1974)

[9]. Cherdron W., Durst F., Whitelow J.H. Assymmetric Flow and Instabilities in Symmetric Ducts with Sudden Expansion, J. Fluid Mech. 84, pp. 13-31. (1978)

[10]. Macadno E.O., Hung Т.К. Computational and Experimental Study of a laptive Annular Eddy, J. Fluid Mech. 28(1).pp. 43-64.(1967)

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