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# Prandtl Number Calculator

To use Prandtl number calculator, select the unknown value, enter the known values, and click calculate button.

Table of Contents:

## Prandtl Number Calculator

Prandtl number calculator is used to find the Prandtl number (dimensionless number) of a fluid.

## What is Prandtl Number?

Prandtl number (Pr) is a dimensionless number. It is the ratio of the kinematic viscosity (ν) of a fluid to its thermal diffusivity (α).

**Formula:**

**Pr = ν/α**

Where,

**ν**is the kinematic viscosity of the fluid**α**is the thermal diffusivity of the fluid.

Using the Prandtl number you can determine the behavior of fluids under different temperatures, gradients, and flow conditions.

**Example**

Calculate the Prandtl number if the Kinematic Viscosity is 10 and Thermal Diffusivity is 16.

**Solution**

**Step 1: **Take the given values.

Kinematic Viscosity =10

Thermal Diffusivity = 16

**Step 2: **Take the formula of the Prandtl number and substitute the values of kinematic viscosity and thermal diffusivity in it.

Pr = ν/α

Pr = 10/16

Pr = 5/8

**Pr = 0.625**