Abstract
Results of a parametric study of unsteady laminar flows are analyzed. Three-dimensional unsteady equations of hydromechanics for a compressible medium are solved. The range of the characteristic Reynolds number Re = 400–900 is considered. It is demonstrated that the laminar flow in a plane channel ceases to be steady at Re = 415. As the Reynolds number increases, the unsteady processes become more intense, disturbances penetrate inward the channel, and separation zones lose their stability. In the vicinity of the channel exit, however, the flow tends to stabilize, though it remains unsteady. No transition to a turbulent flow occurs in the examined range of Reynolds numbers.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. M. Lipanov and S. A. Karskanov, “Stabilization and evolution of parameters of a symmetric laminar flow in a plane channel with sudden expansion,” J. Appl. Mech. Tech. Phys., 48, No. 1, 27–33 (2007).
A. M. Lipanov and S. A. Karskanov, “Investigation of steady laminar flows with an initial disturbance,” J. Appl. Mech. Tech. Phys., 49, No. 3, 354–361 (2008).
N. E. Kochin, I. A. Kibel, and N. V. Rose, Theoretical Hydrodynamics [in Russian], Fizmatgiz, Moscow (1963).
A. T. Fedorchenko, “Numerical study of unsteady subsonic viscous gas flows in a suddenly expanding plane channel,” Izv. Ross. Akad. Nauk, Mekh. Zhidk. Gaza, No. 4, 32–41 (1988).
A. M. Lipanov, Yu. F. Kisarov, and I. G. Klyuchnikov, Numerical Experiment in Classical Hydromechanics of Turbulent Flows [in Russian], Izd. Ural. Otd. Ross. Akad. Nauk, Ekaterinburg (2001).
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 51, No. 1, pp. 7–15, January–February, 2010.
Rights and permissions
About this article
Cite this article
Lipanov, A.M., Karskanov, S.A. Parametric study of unsteady laminar flows. J Appl Mech Tech Phy 51, 4–10 (2010). https://doi.org/10.1007/s10808-010-0002-5
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10808-010-0002-5