| Issue |
Korean Journal of Chemical Engineering,
Vol.26, No.2, 332-338, 2009
Vol.26, No.2, 332-338, 2009
The spatiotemporal instability on mixed convection in porous media
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 Peclet 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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