High Speed Couette—Poiseuille Flow Stability in Reverse Flow Conditions

Date

2006-08-21

Author

Ebrinç, Ali Aslan
Özgen, Serkan
Dursunkaya, Zafer

Metadata

Show full item record

Item Usage Stats

121
views

0
downloads

The linear stability of reverse high speed-viscous plane Couette – Poiseuille flow is investigated numerically. The conservation equations along with Sutherland’s viscosity law are studied using a second order finite difference scheme. Basic velocity and temperature distributions are perturbed by a small amplitude normal-mode disturbance. Small amplitude disturbance equations are solved numerically using a global method to find all the eigenvalues at finite Reynolds numbers. The results indicate that instabilities occur, although the corresponding growth rates are often small. The aim of the study is to see the effect of the reverse flow on the stability compared to the direct flow. In the combined plane Couette – Poiseuille flow, the new mode, Mode 0, which seems to be a member of even modes such as Mode II, is the most unstable mode

Subject Keywords

Couette flow, Poiseuille flow, High Speed flow, Viscous flow, Flow Stability, Eigenvalue, Reverse flow

URI

https://hdl.handle.net/11511/72658
http://www.wseas.us/e-library/conferences/2006elounda2/papers/538-247.pdf

Conference Name

4th IASME/WSEAS International Conference on Fluid Mechanics and Aerodynamics (21 - 23 Ağustos 2006)

Collections

Department of Aerospace Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

TURBULENT BOUNDARY-LAYER AND THE EFFECT OF CRITICAL ROUGHNESS REYNOLDS-NUMBERS ON THE RECOVERY LENGTH BEHIND AN ISOLATED SPHERICAL ROUGHNESS ELEMENT UNDER VARIABLE PRESSURE-GRADIENT Albayrak, Kahraman (1990-03-01) The transition characteristics and the boundary layer development behind an isolated spherical roughness element were investigated in an open-circuit, suction-type wind tunnel. The experiments were performed upon a smooth aluminiuim flat plate placed in the test section of the tunnel. The desired pressure gradient was obtained by means a false roof placed in the test section. In this article, emphasis is given to the recovery length of the turbulent boundary layer behind an isolated spherical roughness ele...
Heat Transfer Simulation of Rarefied Laminar Flow past a Circular Cylinder Çelenligil, Mehmet Cevdet (2016-07-15) Direct simulation Monte Carlo calculations are performed to study the heat transfer in laminar, rarefied flows past a circular cylinder. Results are obtained for flows with Knudsen numbers of 0.02 and 0.2; Mach numbers of 0.102 and 0.4, and also several cylinder temperatures are considered. Calculations show that these flows are attached except for the one with a Knudsen number of 0.02 and a Mach number of 0.4 in which separation occurs in the wake of the cylinder. Results are little affected by the changes...
Numerical Simulation of Rarefied Laminar Flow past a Circular Cylinder Çelenligil, Mehmet Cevdet (2014-07-18) Numerical simulations have been obtained for two-dimensional laminar flows past a circular cylinder in the transitional regime. Computations are performed using the direct simulation Monte Carlo method for Knudsen numbers of 0.02 and 0.2 and Mach numbers of 0.102 and 0.4. For these conditions, Reynolds number ranges from 0.626 to 24.63 and the flows are steady. Results show that separation occurs in the wake region for the flow with Mach number of 0.4 and Knudsen number of 0.02, but for the other eases flow...
Heat transfer effects on the stability of low speed plane Couette-Poiseuille flow Oezgen, Serkan; Dursunkaya, Zafer; Ebrinc, Ali Asian (Springer Science and Business Media LLC, 2007-10-01) The stability problem of low-speed plane Couette-Poiseuille flow of air under heat transfer effects is solved numerically using the linear stability theory. Stability equations obtained from two-dimensional equations of motion and their boundary conditions result in an eigenvalue problem that is solved using an efficient shoot-search technique. Variable fluid properties are accounted for both in the basic flow and the perturbation (stability) equations. A parametric study is performed in order to assess the...
Effect of thickness-to-chord ratio on aerodynamics of non-slender delta wing Ghazijahani, Mohammad Sharifi; Yavuz, Mehmet Metin (2019-05-01) The effect of thickness-to-chord (t/C) ratio on aerodynamics of a non-slender delta wing with sweep angle of 45 degree is characterized in a low-speed wind tunnel using laser illuminated smoke visualization, surface pressure measurements, particle image velocimetry, and force measurements. The delta wings of t/C ratios varying from 2% to 15% with 45 degree windward beveled leading edges are tested. The results indicate that the effect of t/C ratio on flow structure is quite substantial. Considering the low ...

Citation Formats

A. A. Ebrinç, S. Özgen, and Z. Dursunkaya, “High Speed Couette—Poiseuille Flow Stability in Reverse Flow Conditions,” presented at the 4th IASME/WSEAS International Conference on Fluid Mechanics and Aerodynamics (21 - 23 Ağustos 2006), Girit, Yunanistan, 2006, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/72658.