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Asked: June 26, 20202020-06-26T15:48:55+05:30 2020-06-26T15:48:55+05:30In: Thermodynamics & Rate Processes

GATE MT 2018 49

A spherical liquid metal droplet of diameter 1 mm is solidified in a stream of gas at 300 K. Assuming that the metal droplet remains at its melting point of 900 K and neglecting radiative losses, the time to complete the solidification is ______ (in seconds to one decimal place).

Given: The enthalpy of fusion for the metal is 4000 kJ kg-1; The gas-droplet convective heat transfer coefficient is 200 W m-2 K-1; Density of liquid metal is 2700 kg m-3.

enthalpy of fusionGATE MT 2018 Question Paper With SolutionGATE MT Previous Year Questions With SolutionGATE MT Thermodynamics
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    2 Answers

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      digbijaya igit Platinum⭐ GATE 2021 QUALIFIED
      2020-06-26T17:12:23+05:30Added an answer on June 26, 2020 at 5:12 pm

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      • Askmemetallurgy Official Gold official account of Askmemetallurgy
        2020-06-27T16:15:47+05:30Replied to answer on June 27, 2020 at 4:15 pm

        Correct answer is 15 seconds. @Digbijaya igit described it best. Thank you.

        Correct answer is 15 seconds. digbijaya igit igit described it best. Thank you.

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    2. C Patel Metallurgy Platinum⭐ GATE Metallurgy Coaching
      2020-12-18T21:58:12+05:30Added an answer on December 18, 2020 at 9:58 pm

      15 s

      15 s

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