Exact(1)
Our analysis shows that none of the existing correlations is completely satisfactory, that there are contradictions between the existing experimental results and thus more elaborate experiments are needed, and that the tube roughness should be considered.
Similar(7)
Pipe roughness.
The effect of tube wall roughness on the detonation limits in stoichiometric hydrogen oxygen mixture is systematically examined.
They found that the thermal performance for using the roughness tube is higher than the smooth tube.
Webb (2009) concluded that the roughness tube in the range studied provides the highest Nusselt number 3.74 times over the smooth tube.
The four types of the roughness tube were studied.
Open image in new window Fig. 1 Geometries of the roughness tube from the published papers.
Tang et al. (2007) used the roughness tube (see Fig. 1d) to study an oil-filled high-speed spinning process.
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