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GATE2019 ME-1: 9

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For a hydrodynamically and thermally fully developed laminar flow through a circular pipe of constant cross-section, the Nusselt number at  constant wall heat flux $(Nu_q)$ and that at constant wall temperature $(Nu_T)$ are related as

  1. $Nu_q > Nu_T$

  2. $Nu_q < Nu_T$

  3. $Nu_q = Nu_T$

  4. $Nu_q = (Nu_T)^2$

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