Question

Air at 40C flows over a 2 m long flat plate with a free stream velocity of 7 m/s. Assume the width of the plate (into the paper) is 0.5 m. If the plate is at a constant temperature of 100C, find:

Answer 1

Complete Question

Air at 40C flows over a 2 m long flat plate with a free stream velocity of 7m/s. Assume the width of the plate (into the paper) is 0.5 m. If the plate is at a co temperature of 100C,find:

The total heat transfer rate from the plate to the air

Answer:

$q=1.7845$

Explanation:

From the question we are told that:

Air Temperature $T_1=40c$

Length $l=2m$

Velocity $v=7m/s$

Width $w=0.5$

Constant temperature $T_t= 100C$

Generally the equation for Total heat Transfer is mathematically given by

 $q=hA(T_s-T_\infty)$

Where

h=Convective heat transfer coefficient

 $h=29.9075w/m^2k$

Therefore

 $q=h(L*B)(T_s-T_\infty)$

 $q=29.9075*(2*0.5)(100+273-(40+273))$

 $q=1794.45w$

 $q=1.7845$