Electron. J. Diff. Equ., Vol. 2010(2010), No. 46, pp. 1-14.

Steady-state thermal Herschel-Bulkley flow with Tresca's friction law

Farid Messelmi, Boubakeur Merouani, Fouzia Bouzeghaya

Abstract:
We consider a mathematical model which describes the steady-state flow of a Herschel-Bulkley fluid whose the consistency and the yield limit depend on the temperature and with mixed boundary conditions, including a frictional boundary condition. We derive a weak formulation of the coupled system of motion and energy equations which consists of a variational inequality for the velocity field. We prove the existence of weak solutions. In the asymptotic limit case of a high thermal conductivity, the temperature becomes a constant solving an implicit total energy equation involving the consistency function and the yield limit.

Submitted January 16, 2010. Published April 6, 2010.
Math Subject Classifications: 35J85, 76D03, 80A20.
Key Words: Herschel-Bulkley fluid; thermal friction law; variational inequality; weak solution.

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Farid Messelmi
Department de Mathematiques
Univerisite Zian Achour de Djelfa
Djelfa 17000, Algeria
email: foudimath@yahoo.fr
Boubakeur Merouani
Department de Mathematiques
Universite Ferhat-Abbes de Setif
Setif 19000, Algeria
email: mermathsb@hotmail.fr
Fouzia Bouzeghaya
Department de Mathematiques
Universite Ferhat-Abbes de Setif
Setif 19000, Algeria
email: bouzeghaya@yahoo.fr

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