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Figure 4 - Conduction by particle collision
In flowing fluids, thermal conduction dominates in the region very close to the
boundary layer, where
– the flow is laminar;
– the flow parallel to the surface;
- there is no any motion.
The measurement of how well a material can conduct heat depends on how it's
molecules are structurally bonded together. A listing of the heat conductivity λ of
various substances is shown in Figure. 5 and table 1.
Figure 5 – Heat conductivities of various materials under room temp.
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