Ch6-Intro to Convection

Ch6-Intro to Convection - Chapter 6 Introduction to...

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Unformatted text preview: Chapter 6 Introduction to Convection Boundary Layers: Physical Features Velocity Boundary Layer A consequence of viscous effects associated with relative motion between a fluid and a surface. A flow region characterized by shear stresses and velocity gradients. A region between the surface and the free stream whose thickness increases in the flow direction. ( 29 0.99 = u y u Manifested by a surface shear stress that provides a drag force, . s D F = = s y u y = s D s s A F dA , Re critical Reynolds number c x c u x Thermal Boundary Layer A consequence of heat transfer between the surface and fluid. A region of the flow characterized by temperature gradients and heat fluxes. A region between the surface and the free stream whose thickness increases in the flow direction. t Manifested by a surface heat flux and a convection heat transfer coefficient h ....
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This note was uploaded on 02/01/2012 for the course MECH ENG 225 taught by Professor Koylu during the Spring '11 term at Missouri S&T.

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Ch6-Intro to Convection - Chapter 6 Introduction to...

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