| Autor: |
Ravisha, M., Alsulami, M. D., Mamatha, A. L., Shivakumara, I. S. |
| Předmět: |
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| Zdroj: |
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics; 1/20/2023, Vol. 37 Issue 2, p1-15, 15p |
| Abstrakt: |
This study aims at finding the linear theory for the onset of ferromagnetic convective flow in a heterogeneous Brinkman porous layer with uniformly distributed internal heat source in the presence of vertical magnetic field. The resulting critical values are obtained numerically using the Galerkin technique for isothermal/insulated rigid-ferromagnetic boundaries for different forms of vertical heterogeneity permeability function F (z). The results converge for six terms in the Galerkin expansion. The effect of types of F (z) and N s is found to either delay or speedup the flow of the ferrofluids. The stability of the system for the model F 4 is more stable and least stable for the model F 1 in the presence of N s . For different forms of F (z) , the results show that the critical Rayleigh number increases with increasing D a , while decreases with increasing R m and M 3 . The values of a c increase with R m , but they decrease with increasing M 3 and D a. Besides, isothermal boundaries are found to be more stabilizing when compared to insulated boundaries. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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