which dimensionless number indicates the ratio of convection and conduction heat transfer in a fluid?

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15-11-2022
Engineering

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which dimensionless number indicates the ratio of convection and conduction heat transfer in a fluid?

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charithran8975 charithran8975 · Answer 1 · 2022-11-27T17:23:35+01:00

Pure conduction heat transport is represented by a Nusselt number of value one (zero). Slug flow or laminar flow is characterized by a value between one (zero) and ten.

More active convection is correlated with a higher Nusselt number, with turbulent flow often in the 100–1000 range. The ratio of the inertial to the viscous forces is represented by the Reynolds number. The major purpose of it is to describe the change from laminar to turbulent flow. The Reynolds number can be quite high (> 106) at the process scale. When dealing with convection, the Nusselt number, which is the dimensionless heat transfer coefficient, is present. As a result, it offers a measurement of surface convective heat transfer.

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