1. What is Kinematic Viscosity?

Kinematic Viscosity at 20° C standard is a measure of a fluid's internal resistance to flow under gravitational forces. It represents the ratio of dynamic viscosity to fluid density.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( v_s \) — Kinematic Viscosity at 20° C (m²/s)
• \( \mu \) — Dynamic Viscosity (Pa·s)
• \( \rho_f \) — Mass Density of Fluid (kg/m³)

Explanation: The formula calculates kinematic viscosity by dividing the dynamic viscosity by the mass density of the fluid.

3. Importance of Viscosity Calculation

Details: Understanding both dynamic and kinematic viscosity is crucial for fluid dynamics analysis, engineering applications, and predicting fluid behavior in various systems.

4. Using the Calculator

Tips: Enter dynamic viscosity in Pa·s and mass density in kg/m³. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

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

Q2: What are typical units for kinematic viscosity?
A: The SI unit is m²/s, but Stokes (St) and centistokes (cSt) are also commonly used (1 St = 10⁻⁴ m²/s).

Q3: Why is temperature (20°C) specified?
A: Viscosity is highly temperature-dependent. Standard measurements are often taken at 20°C for consistency and comparability.

Q4: How does density affect kinematic viscosity?
A: For the same dynamic viscosity, a denser fluid will have lower kinematic viscosity, meaning it flows more easily under gravity.

Q5: Where is this calculation commonly used?
A: This calculation is essential in petroleum industry, lubrication engineering, hydraulic systems, and any application involving fluid flow analysis.