The surface temperature of a 3.5 m high, 6 m wide wall is 15 ◦C.
The room air
is maintained at 23◦C with a thermostat. Estimate the heat transfer
between the room air
and the wall. [Ans. Lc = 3.5 m; RaL = 3.71 × 1010; NuL = 507; hbarL
= 3.69 W·m−2·K−1;
Q = 620 W; note that for an ideal gas, β = 1/T∞.]
The surface temperature of a 3.5 m high, 6 m wide wall is 15 ◦C. The room air is maintained at 23◦C with a thermostat. E
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The surface temperature of a 3.5 m high, 6 m wide wall is 15 ◦C. The room air is maintained at 23◦C with a thermostat. E
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