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Convection induced by instabilities in the presence of a transverse seepage

Author

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  • Akinaga, Takeshi
  • Itano, Tomoaki
  • Generalis, Sotos

Abstract

The transition of laterally heated flows in a vertical layer and in the presence of a streamwise pressure gradient is examined numerically for the case of different values Prandtl number. The stability analysis of the basic flow for the pure hydrodynamic case (Pr=0) was reported in [1]. We find that in the absence of transverse pumping the previously known critical parameters are recovered [2], while as the strength of the Poiseuille flow component is increased the convective motion is delayed considerably. Following the linear stability analysis for the vertical channel flow our attention is focused on a study of the finite amplitude secondary travelling-wave (TW) solutions that develop from the perturbations of the transverse roll type imposed on the basic flow and temperature profiles. The linear stability of the secondary TWs against three-dimensional perturbations is also examined and it is shown that the bifurcating tertiary flows are phase-locked to the secondary TWs.

Suggested Citation

  • Akinaga, Takeshi & Itano, Tomoaki & Generalis, Sotos, 2016. "Convection induced by instabilities in the presence of a transverse seepage," Chaos, Solitons & Fractals, Elsevier, vol. 91(C), pages 533-543.
    • Handle: RePEc:eee:chsofr:v:91:y:2016:i:c:p:533-543
    DOI: 10.1016/j.chaos.2016.07.012
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    Cited by:

    1. Harfash, Akil J. & Meften, Ghazi Abed, 2018. "Couple stresses effect on linear instability and nonlinear stability of convection in a reacting fluid," Chaos, Solitons & Fractals, Elsevier, vol. 107(C), pages 18-25.

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