👉 The Pr fluid, also known as Prandtl's fluid or Prandtl layer fluid, is a theoretical concept in fluid dynamics that simplifies the analysis of fluid flow by assuming a thin boundary layer near a solid surface where viscous effects are significant but inertial forces are relatively small. This fluid model helps in understanding heat transfer and mass transfer phenomena, particularly in convective processes, by separating the effects of viscosity (which causes momentum diffusion) from those of inertia (which causes velocity gradients). The Pr fluid assumption allows for the derivation of simplified equations that relate the velocity profile, temperature distribution, and pressure gradient within this thin layer, facilitating easier calculations and predictions in engineering applications such as heat exchangers, aerodynamics, and fluid flow over surfaces.
