Prandtl Number Heat Transfer. Pr μ c p k 2 where. 07 1 while the prandtl number for most.
The prandtl number which is pr 089 the nusselt number for the forced convection inside the fuel channel is then equal to. The simplest model for pr t is the reynolds analogy which yields a turbulent prandtl number of 1. Formula for the calculation of the prandtl number for air and water.
The prandtl number pr of a fluid gives the relative importance of the momentum boundary layer to the thermal boundary layer in the transfer of heat.
The prandtl number can alternatively be expressed as. Its physical significance can be inferred from its definition. With a prandtl number of 07 air is in a range where the hydrodynamic and thermal boundary layer are approximately equal. It simply describes mixing because of swirlingrotation of fluids.