Combined heat and mass transfer by natural convection from a semi-infinite plate submitted to a magnetic field with Hall currents

  1. Zueco, J. 1
  2. López-Ochoa, L.M. 2
  3. Eguía, P. 3
  4. Collazo, J. 3
  1. 1 Universidad Politécnica de Cartagena

    Universidad Politécnica de Cartagena

    Cartagena, España


  2. 2 Universidad de La Rioja

    Universidad de La Rioja

    Logroño, España


  3. 3 Universidade de Vigo

    Universidade de Vigo

    Vigo, España


Engineering Applications of Computational Fluid Mechanics

ISSN: 1994-2060

Ano de publicación: 2011

Volume: 5

Número: 2

Páxinas: 188-200

Tipo: Artigo

DOI: 10.1080/19942060.2011.11015363 SCOPUS: 2-s2.0-79955873487 WoS: WOS:000290508900004 GOOGLE SCHOLAR

Outras publicacións en: Engineering Applications of Computational Fluid Mechanics


The present work is concerned with the MHD unsteady free convection flow from a vertical semiinfinite plate of an incompressible electrically conducting fluid. The effects of the viscous dissipation and the Hall currents are analyzed. The unsteady governing equations are reduced to a system of ordinary differential nondimensional equations and the resulting equation system is solved numerically by using the Network Simulation Method. This numerical method is based on the electrical analogy, where only previous spatial discretization is necessary to obtain a stable and convergent solution with very low computational times. To solve the system of algebraic equations with time as continuous function, an electric circuit simulator is used. Numerical results for velocities, temperature, concentration and current terms are illustrated graphically. We have observed that the Grashof number for heat transfer (Gr) and mass transfer (G *) accelerate the velocity of the flow field at all points. But the increase in velocity of the flow field is more significant in presence of mass transfer. The effect of Schmidt number Sc on mass transfer process is a decrease of concentration distribution as a result of decrease of the concentration boundary layer thickness.