Convection over plate (top and bottom)

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SUMMARY

The discussion focuses on calculating the average convection heat transfer coefficient and convective heat transfer rate for a flat plate subjected to parallel airflow from both the top and bottom. Given parameters include a flow velocity (u∞) of 5 m/s, a temperature (T∞) of 20°C, a plate length (L) of 2m, and a surface temperature (Ts) of 50°C. The Reynolds number (ReL) is calculated using the formula ReL = V*L/v, where L is definitively 2m, as it is measured from one surface. The convective heat transfer coefficient (h) is derived from the Nusselt number (Nu) using the equation h = Nu*k/L.

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Homework Statement



Consider a flat plate subject to parrallel flow (top and bottom) characterized by u = 5 m/s and T = 20°C.

Determine the average convection heat transfer coefficient and convective heat transfer rate with an L = 2m long and w = 2m wide flat plate for airflow and surface temp Ts = 50°C

Homework Equations



ReL = V*L/v

h = Nu*k/L

The Attempt at a Solution



My question is what should the L be to calculate the Reynold's number and conventive coefficient. Is it 2m or 4m since fluid flows over the top and bottom?
 
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The L is measured from one surface so L is 2 m.
 

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