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Which outcome limits heat exchanger effectiveness when cooling viscous oil?

A)Reduced convective heat transfer
B)Increased shell-side flow rate
C)Elevated material thermal conductivity
D)Decreased tube-wall film temperatures

💡 Explanation

A low Reynolds Number leads to laminar flow, because the momentum diffusivity dominates over the advective transport, therefore reducing mixing, thus limiting convective heat transfer, rather than anything contributing directly to conductive transfer alone which would have aided it.

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