As strip steel leaves the last set of rollers in a
Chapter 10, Problem 10.37(choose chapter or problem)
As strip steel leaves the last set of rollers in a hotrolling mill, it is quenched by planar water jets beforebeing coiled. Due to the large plate temperatures, filmboiling is achieved shortly downstream of the jetimpingement region. Consider conditions for which the strip steel beneaththe vapor blanket is at a temperature of 907 K and has an emissivity of 0.35. Neglecting the effects of thestrip and jet motions and assuming boiling within the film to be approximated by that associated with alarge horizontal cylinder of 1-m diameter, estimate therate of heat transfer per unit surface area from the stripto the wall jet.
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