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The convective heat transfer coefficient h strongly depends on the fluid properties and roughness of the solid surface, and the type of the fluid flow (laminar
This measurement is based on extracting the average heat transfer coefficients from time-depen- dant temperature curves as a function of velocity and bypass
Figure 7 shows heat transfer coefficients versus time under a pressure of 500 kPa with flow velocity of 38 8 m/s at the periods of 1 6 s and 420 ms
or flow around a circular cylinder in ft (U S ) or m (S I ) • V is a characteristic velocity, such as the average velocity for pipe flow in ft/sec (U S )