The primary driving force for natural convection is

For the fluid flowing over a flat plate with Prandtl number greater than unity, the thermal boundary layer for laminar forced convection

For flow of fluid over a heated plate, the following fluid properties are known: Viscosity=0.001 Pa/s, Sp. Heat at constant pressure=1 kJ/kgK, Thermal Conductivity=1W/mK; The hydrodynamic boundary layer thickness at a specified location on the plate is 1mm, thermal boundary layer thickness at the same location is 

For laminar forced convection over a flat plate, if the free stream velocity increases by a factor of 2, the average heat transfer coefficient 

Nusselt number is given by

The value of convective heat transfer coefficient depends on

The value of convective heat transfer coefficient for air in free convection is

The dimensional formula of coefficient of viscosity is

The Prandtl number is defined as the ratio of 

For highly viscous oils, the value of Prandtl number is