Grashoff number is useful in 

In the case of fluid flowing over a circular pipe, the fluid properties should be considered at 

Air at 20°C and at a pressure of 1 bar is flowing over a flat plate at a velocity of 3m/sec. If the plate is 280 mm wide and at 56°C, calculate the hydrodynamic boundary layer thickness at x = 280 mm. 

Air at 20°C and at a pressure of 1 bar is flowing over a flat plate of 280mm x 280mm at a velocity of 3m/sec. If the plate is at 56°C, calculate the heat transfer rate from the plate. Take average heat transfer coeficient as 12.86 W/m²K.

The dimensional formula of convective heat transfer coefficient is

Which of the following heat flow situations pertains to free or natural convection?

The dimensionless parameter $\frac{l^3 {\rho }^2 \beta g∆T}{{\mu }^2}$ is referred to as

Mark the system where heat transfer is by forced convection

Forced convection in a liquid bath is caused by  

A finned tube hot water radiator with a fan blowing air over it is kept in rooms during winter. The major portion of the heat transfer from the radiator is due to