Along, square, electrical heating element standing on a corner
with one side of the square heating element being 25mm, thermal
conductivity k = 240 W/m ? K, density ñ = 2700 kg/m3, and
specific heat cp = 900 J/kg ? K is installed in a
duct for which air moves in cross flow over the heater at a
temperature and velocity of 30°C and 10 m/s, respectively.
(a) Neglecting radiation, estimate the steady-state surface
temperature when, per unit length of...