Chapter 8: Internal Forced Convection
Chapter 8: Internal Forced Convection
Chapter 8: Internal Forced Convection
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Developing Laminar Flow in the Entrance Region• For a circular tube of length L subjected to constantsurface temperature, the average Nusselt number forthe thermal entrance region (hydrodynamicallydeveloped flow)0.065( DL)Re⋅PrNu = 3.66 +1+ 0.04⎡⎣( DL)Re⋅Pr⎤⎦• For flow between isothermal parallel plates23(8-62)Nu= 7.54 +0.03 D L Re⋅Pr( )h1+ 0.016⎡⎣( D ) hL Re⋅Pr⎤⎦23(8-64)