| HAL : hal-00161672, version 1 |
| arXiv : 0707.1628 |
| Fiche détaillée | Récupérer au format |
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| On the solutions of a boundary value problem arising in free convection with prescribed heat flux |
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| Mohamed Aïboudi 1Bernard Brighi 2 |
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| (06/2007) |
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| For given $a\in\R$, $c<0$, we are concerned with the solution $f^{}_b$ of the differential equation $f^{\prime\prime\prime}+ff^{\prime\prime}+\g(f^{\prime})=0$, satisfying the initial conditions $f(0)=a$, $f'(0)=b$, $f''(0)=c< 0$, where $\g$ is some nonnegative subquadratic locally Lipschitz function. It is proven that there exists $b_*>0$ such that $f^{}_b$ exists on $[0,+\infty)$ and is such that $f'_b(t)\to 0$ as $t\to+\infty$, if and only if $b\geq b_*$. This allows to answer questions about existence, uniqueness and boundedness of solutions to a boundary value problem arising in fluid mechanics, and especially in boundary layer theory. |
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| 1 : | Département de Mathématiques |
| Université d'Oran Es-Senia | |
| 2 : | Laboratoire de Mathématiques Informatique et Applications (LMIA) |
| Université de Haute Alsace - Mulhouse | |
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| Domaine | : | Mathématiques/Systèmes dynamiques |
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| Boundary layer – similarity solution – third order nonlinear differential equation – boundary value problem – fluid mechanics. |
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| hal-00161672, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00161672 | |
| oai:hal.archives-ouvertes.fr:hal-00161672 | |
| Contributeur : Bernard Brighi | |
| Soumis le : Mercredi 11 Juillet 2007, 12:38:28 | |
| Dernière modification le : Mercredi 11 Juillet 2007, 16:10:41 | |