The Complex Ginzburg Landau Model for an Oscillatory Convection in a Rotating Fluid Layer
| Autor: | S.H. Manjula, P. Kiran, P. Raj Reddy, B.S. Bhadauria |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | International Journal of Applied Mechanics and Engineering, Vol 25, Iss 1, Pp 75-91 (2020) |
| Druh dokumentu: | article |
| ISSN: | 1734-4492 2353-9003 |
| DOI: | 10.2478/ijame-2020-0006 |
| Popis: | A weakly nonlinear thermal instability is investigated under rotation speed modulation. Using the perturbation analysis, a nonlinear physical model is simplified to determine the convective amplitude for oscillatory mode. A non-autonomous complex Ginzburg-Landau equation for the finite amplitude of convection is derived based on a small perturbed parameter. The effect of rotation is found either to stabilize or destabilize the system. The Nusselt number is obtained numerically to present the results of heat transfer. It is found that modulation has a significant effect on heat transport for lower values of ω f while no effect for higher values. It is also found that modulation can be used alternately to control the heat transfer in the system. Further, oscillatory mode enhances heat transfer rather than stationary mode. |
| Databáze: | Directory of Open Access Journals |
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