1. What is Kinematic Viscosity?

Kinematic viscosity is an atmospheric variable defined as the ratio between the dynamic viscosity μ and the density ρ of the fluid. It represents the fluid's resistance to flow under gravity and is measured in square meters per second (m²/s).

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( v \) — Kinematic viscosity (m²/s)
• \( V_{flow} \) — Flow velocity (m/s)
• \( D_p \) — Diameter of pipe (m)
• \( Re \) — Reynolds Number (dimensionless)

Explanation: This formula calculates kinematic viscosity based on flow velocity, pipe diameter, and Reynolds number, which represents the ratio of inertial forces to viscous forces within a fluid.

3. Importance of Kinematic Viscosity Calculation

Details: Kinematic viscosity is crucial for understanding fluid behavior in various applications, including pipe flow analysis, hydraulic systems, lubrication, and heat transfer calculations. It helps determine flow characteristics and predict fluid performance in different conditions.

4. Using the Calculator

Tips: Enter flow velocity in m/s, pipe diameter in meters, and Reynolds number (dimensionless). All values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between kinematic and dynamic viscosity?
A: Dynamic viscosity measures a fluid's resistance to flow under applied force, while kinematic viscosity is dynamic viscosity divided by density, representing resistance to flow under gravity.

Q2: What are typical values for kinematic viscosity?
A: Water at 20°C has kinematic viscosity of about 1×10⁻⁶ m²/s, while engine oils range from 10-100×10⁻⁶ m²/s, and air is around 15×10⁻⁶ m²/s.

Q3: How does temperature affect kinematic viscosity?
A: For liquids, kinematic viscosity generally decreases with increasing temperature, while for gases, it increases with temperature.

Q4: What is the significance of Reynolds number in this calculation?
A: Reynolds number indicates whether flow is laminar or turbulent and is crucial for determining the relationship between flow parameters and viscosity.

Q5: Can this formula be used for all fluid types?
A: This formula is generally applicable for Newtonian fluids in pipe flow, but may need modification for non-Newtonian fluids or complex flow geometries.