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Heat transfer in molten metals

  • JensenBreck
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5 years 6 days ago - 5 years 6 days ago #815 by JensenBreck
JensenBreck created the topic: Heat transfer in molten metals
Hi all,

I am currently working on a heat transfer problem for a galvanizing process. I would like to determine the time it takes wire to saturate to the temperature of the molten lead it is pulled through. The problem I have is in calculating the heat transfer coefficient h. The wire is pulled slowly (<1m/s) through the molten lead such that the flow is axially along the wire (horizontal cylinder with parallel flow). I have attempted to approximate h by assuming the Nu relation for flow of liquid metal over a flat plate (Nu = 0.564*Pr^0.5*Re^0.5). However i'm unsure on the validity of this assumption.

Is there any relation for Nusselt number or heat transfer coefficient for laminar flow axially over a cylinder? I can only seem to find correlations for flow across a cylinder (e.g.: In a tube bank system). I'm at a complete loss at the moment.

Any suggestions?
Please help.
Thanks!

I didn't find the right solution from the Internet.

References: ultrametcpt.com/corrosion-forum/other-co...ia/topic/create.html

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Last Edit: 5 years 6 days ago by JensenBreck.

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