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Engineering, 21.08.2020 01:01 kkruvc

A solid is suspended in atmospheric air having a free stream temperature and velocity of 20°C and 120 m/s, respectively. The solid has a characteristic length of 2 m, and its surface is maintained at 80°C. Under these conditions, the convective heat flux at a particular point on the surface (x*, 0) and the temperature in the boundary layer above this point (x*, y*) are measured to be 104 W/m2 and 60°C, respectively. A mass transfer occurs on another solid of the same shape with the characteristic length of 3 m. In particular, a thin film of water on the solid is to be evaporated in dry atmospheric air having a free stream velocity of 80 m/s, with the air and the solid both at a temperature of 50°C. It is known

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