GATE MT · 2018 · MT
Question 49: Phase transformation
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Question 49
MTNAT2 marksNeeds review
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 400 kJ kg
; the gas-droplet convective heat transfer coefficient is 200 W m
K
; Density of liquid metal is 2700 kg m
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2018MT
GATE MT 2018 · Paper 1
Metallurgical Engineering · Original paper archive
- Section
- Metallurgical Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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