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GATE Mechanical 2022 Set 2 | Question: 15

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Which of the following non-dimensional terms is an estimate of Nusselt number?

  1. Ratio of internal thermal resistance of a solid to the boundary layer thermal resistance
  2. Ratio of the rate at which internal energy is advected to the rate of conduction heat transfer
  3. Non-dimensional temperature gradient
  4. Non-dimensional velocity gradient multiplied by Prandtl number
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