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The spatiotemporal instability on mixed convection in porous media

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Abstract

The absolute and convective instability on mixed convection in porous media is examined, and the phase transition from the oscillatory wave motion to the stationary vortex one is observed. Based on linear and weakly nonlinear analyses, the critical conditions to mark the onset of traveling transverse rolls are analytically obtained for small Péclet numbers. The flow change from transverse wave to longitudinal vortex is reproduced by numerical simulation. These criteria made good agreement with the available experiment data.

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Authors and Affiliations

  1. R&D center, Samsung Electro-Mechanics, Suwon, 443-370, Korea

    Tae Joon Chung

  2. Department of Chemical Engineering, Jeju National University, Jeju, 690-756, Korea

    Min Chan Kim

  3. School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-744, Korea

    Chang Kyun Choi

Authors
  1. Tae Joon Chung
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  2. Min Chan Kim
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  3. Chang Kyun Choi
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Correspondence to Tae Joon Chung.

Additional information

This paper is dedicated to Professor Chang Kyun Choi to celebrate his retirement from the school of chemical and biological engineering of Seoul National University.

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Chung, T.J., Kim, M.C. & Choi, C.K. The spatiotemporal instability on mixed convection in porous media. Korean J. Chem. Eng. 26, 332–338 (2009). https://doi.org/10.1007/s11814-009-0056-3

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  • DOI: https://doi.org/10.1007/s11814-009-0056-3

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