The transition of internally heated inclined plane parallel shear flows is examined numerically for the case of finite values of the Prandtl number Pr. We show that as the strength of the homogeneously distributed heat source is increased the basic flow loses stability to two-dimensional perturbations of the transverse roll type in a Hopf bifurcation for the vertical orientation of the fluid layer, whereas perturbations of the longitudinal roll type are most dangerous for a wide range of the value of the angle of inclination. In the case of the horizontal inclination transverse roll and longitudinal roll perturbations share the responsibility for the prime instability. Following the linear stability analysis for the general inclination of the fluid layer our attention is focused on a numerical study of the finite amplitude secondary travelling-wave solutions (TW) that develop from the perturbations of the transverse roll type for the vertical inclination of the fluid layer. The stability of the secondary TW against three-dimensional perturbations is also examined and our study shows that for Pr=0.71 the secondary instability sets in as a quasi-periodic mode, while for Pr=7 it is phase-locked to the secondary TW. The present study complements and extends the recent study by Nagata and Generalis (2002) in the case of vertical inclination for Pr=0.
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Transition in Homogeneously Heated Inclined Plane Parallel Shear Flows
S. Generalis,
e-mail: s.c.generalis@aston.ac.uk
S. Generalis
School of Engineering and Applied Sciences, Division of Chemical Engineering and Applied Chemistry, Aston University, United Kingdom
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M. Nagata
M. Nagata
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Japan
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S. Generalis
School of Engineering and Applied Sciences, Division of Chemical Engineering and Applied Chemistry, Aston University, United Kingdom
e-mail: s.c.generalis@aston.ac.uk
M. Nagata
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Japan
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division November 14, 2002; revision received May 16, 2003. Associate Editor: P. S. Ayyaswamy.
J. Heat Transfer. Oct 2003, 125(5): 795-803 (9 pages)
Published Online: September 23, 2003
Article history
Received:
November 14, 2002
Revised:
May 16, 2003
Online:
September 23, 2003
Citation
Generalis, S., and Nagata, M. (September 23, 2003). "Transition in Homogeneously Heated Inclined Plane Parallel Shear Flows ." ASME. J. Heat Transfer. October 2003; 125(5): 795–803. https://doi.org/10.1115/1.1599370
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