Mixed Convection

  • Donald A. Nield
  • Adrian Bejan


Since we have dealt with natural convection and forced convection in some detail, our treatment of mixed convection can be brief. It is guided by the review paper by Lai, Prasad, and Kulacki (1991). We start with a treatment of boundary layer flow on heated plane walls inclined at some nonzero angle to the horizontal. This configuration is illustrated in Fig. 8.1. The boundary layer equations [compare Eqs. (5.5) and (5.6)] for steady flow are
$$ \frac{{{\partial ^2}\psi }}{{\partial {y^2}}} = \pm \frac{{{g_x}\beta K}}{v}\frac{{\partial T}}{{\partial v}} $$
$$ \frac{{\partial \psi }}{{\partial y}}\frac{{\partial T}}{{\partial x}} - \frac{{\partial \psi }}{{\partial x}}\frac{{\partial T}}{{\partial y}} = \frac{\partial }{{\partial y}}\left( {{\alpha _m}\frac{{\partial T}}{{\partial y}}} \right) $$


Nusselt Number Rayleigh Number Mixed Convection Local Nusselt Number Boundary Layer Equation 
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Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • Donald A. Nield
    • 1
  • Adrian Bejan
    • 2
  1. 1.Engineering SciencesUniversity of AucklandAucklandNew Zealand
  2. 2.Mechanical EngineeringDuke UniversityDurhamUSA

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