What is meant by Prandtl number?

Prandtl number (Pr) is defined as the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity.

Where is Prandtl number used?

A dimensionless number approximating the ratio of momentum diffusivity to thermal diffusivity. The Prandtl Number is often used in heat transfer and free and forced convection calculations. It depends on the fluid properties.

What is Nusselt number and Prandtl number?

Nusselt number is the ratio of convection heat transfer to pure conduction heat transfer, (K- Thermal conductivity of fluid) Reynolds number is the ratio of the inertia to the viscous forces avting on a fluid. Prandtl number is the ratio of the momentum and thermal diffusivities.

How do I use Prandtl number?

The Prandtl number is a dimensionless number defined as the ratio of momentum diffusivity to thermal diffusivity. The Prandtl number equals the specific heat capacity times the dynamic viscosity divided by the thermal conductivity.

Why is Prandtl number important?

In heat transfer problems, the Prandtl number controls the relative thickness of the momentum and thermal boundary layers. When Pr is small, it means that the heat diffuses quickly compared to the velocity (momentum).

What is Prandtl number in heat and mass transfer?

Prandtl number (Pr) is defined as the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity. From: Applications of Nanofluid for Heat Transfer Enhancement, 2017.

What does Reynolds number represent?

The Reynolds number is the ratio of inertial forces to viscous forces. The Reynolds number is a dimensionless number used to categorize the fluids systems in which the effect of viscosity is important in controlling the velocities or the flow pattern of a fluid.

What is the viscosity of blood?

Blood is a non-Newtonian, shear thinning fluid with thixotropic and viscoelastic properties. Many cardiovascular handbooks consider blood viscosity values between 3.5 and 5.5 cP to be normal.