class 10

# class 10 - Introduction to Convection Flow and Thermal...

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Introduction to Convection: Flow and Thermal Considerations Sections 6.1 through 6.3 Class 10

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A thick steel slab is initially at 300 o C and is cooled by water jets impinging on one of its surfaces. The temperature of the water is 25 o C, and the jets maintain an extremely large, approximately uniform convection coefficient at the surface. Assuming that the surface is maintained at the temperature of the water throughout the cooling, how long will it take for the temperature to reach 50 o C at a distance of 25 mm from the surface.

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A thick steel slab is initially at 300 o C and is cooled by water jets impinging on one of its surfaces. The temperature of the water is 25 o C, and the jets maintain an extremely large, approximately uniform convection coefficient at the surface. Assuming that the surface is maintained at the temperature of the water throughout the cooling, how long will it take for the temperature to reach 50 o C at a distance of 25 mm from the surface.
What is convection? so far we’ve used it as part of a boundary condition it’s energy transfer between a surface and a fluid moving over the surface (at T ) what are we going to learn All about boundary layers

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