23 - Pertinent Dimensionless Parameters Grashof Number Free Convection General Considerations and Results for Vertical and Horizontal Plates

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10/25/2010 1 Free Convection: General Considerations and Results for Vertical and Horizontal Plates Chapter 9 Sections 9.1 through 9.6.2 • Pertinent Dimensionless Parameters h Grashof Number: = Buoyancy force/viscous force h Rayleigh Number: 2 3 ) ( ν β L T T g Gr s L να 3 ) ( Pr L T T g Gr Ra s L L = Vertical Plates • Free Convection Boundary Layer Development on a Heated Plate : h Ascending flow with the maximum velocity occurring in the boundary layer and zero velocity at both the surface and outer edge. ( ) ? s T T < The fluid close to the plate is _________ the fluid beyond it. a) Less dense than b) More dense than c) As dense as • Form of the x -Momentum Equation for Laminar Flow Net Momentum Fluxes ( Inertia Forces ) Buoyancy Force Viscous Force h Temperature dependence requires that solution for u ( x,y ) be obtained concurrently with solution of the boundary layer energy equation for T ( x,y ). The solutions are said to be coupled .
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10/25/2010 2 If we need to couple these two equations, what do we need to use? a) The error function
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This note was uploaded on 11/17/2010 for the course CHEN 3210 at Colorado.

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23 - Pertinent Dimensionless Parameters Grashof Number Free Convection General Considerations and Results for Vertical and Horizontal Plates

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