Test: Nusselt Number - Mechanical Engineering MCQ

The temperature profile at a particular location in a thermal boundary layer is prescribed by n expression of the form
t (y) = A- B y + C y ²
Where, A, B and Care constants. What is the value of heat transfer coefficient?

The temperature profile at a particular location on a surface is prescribed by the identity
(t _s – t) / (t _s – t _infinity) = sin (π y/0.015)
If thermal conductivity of air is stated to be 0.03 W/m K, determine the value of convective heat transfer coefficient

Air at 20 degree Celsius flows over a flat plate maintained at 75 degree Celsius. Measurements shows that temperature at a distance of 0.5 mm from the surface of plate is 50 degree Celsius. Presuming thermal conductivity of air is 0.0266 W/m K, estimate the value of local heat transfer coefficient

Air at 20 degree Celsius flows over a flat surface maintained at 80 degree Celsius. Estimate the value of local heat transfer coefficient if the local heat flow at a point was measured as 1250 W/m². Take thermal conductivity of air as 0.028 W/m K

Consider the above problem, calculate the temperature gradient at the surface

At the interface of solid body, heat flows by conduction and is given by

For a given value of Nusselt number, the convective surface coefficient h is directly proportional to