Pois (p) to Pascal-second (pas) Converter

What is Viscosity?

Viscosity measures a fluid’s resistance to flow. It determines how easily a liquid or gas moves under an applied force. High-viscosity fluids (e.g., honey) flow slowly, while low-viscosity fluids (e.g., water) flow quickly.

What are the common viscosity units?

• Pascal-second (Pa·s): The SI unit of dynamic viscosity.
• Centipoise (cP): A common unit used in industries, where 1 cP = 0.001 Pa·s.
• Poise (P): Another CGS unit, where 1 P = 0.1 Pa·s.
• Millipascal-second (mPa·s): Equivalent to centipoise (1 mPa·s = 1 cP).

What is the difference between dynamic and kinematic viscosity?

Dynamic viscosity (measured in Pa·s or cP) quantifies a fluid’s resistance to shear stress. Kinematic viscosity (measured in Stokes or mm²/s) is dynamic viscosity divided by fluid density.

What are some examples of viscosity values?

• Water: ~1 cP (centipoise)
• Olive oil: ~80 cP
• Honey: ~10,000 cP
• Motor oil (SAE 10W-30): ~100 cP
• Molasses: ~5,000-10,000 cP

How does temperature affect viscosity?

Viscosity decreases as temperature increases. For example, heating honey makes it flow more easily. This is because higher temperatures reduce intermolecular forces within the fluid.

Why is viscosity important in engineering and industry?

• Lubricants: Engine oils must have optimal viscosity to reduce wear and friction.
• Food industry: Viscosity affects product texture and quality (e.g., sauces, syrups).
• Pharmaceuticals: Syrups and medicinal solutions require controlled viscosity.
• Paints and coatings: Viscosity influences how paints spread and adhere to surfaces.

How do you convert between viscosity units?

Use the following common conversions:

• 1 Poise (P) = 0.1 Pascal-seconds (Pa·s)
• 1 Centipoise (cP) = 0.001 Pascal-seconds (Pa·s)
• 1 Millipascal-second (mPa·s) = 1 Centipoise (cP)

How do you measure viscosity?

• Viscometer: Measures fluid resistance to shear or flow.
• Capillary tube: Measures viscosity based on flow through a narrow tube.
• Rotational viscometer: Determines viscosity by measuring torque resistance.

Why does honey have high viscosity?

Honey is highly viscous due to its high sugar content and molecular structure. The hydrogen bonds between sugar molecules increase its resistance to flow.

What is the viscosity of water at different temperatures?

• 0°C: 1.79 cP
• 20°C: 1.00 cP
• 40°C: 0.65 cP
• 100°C: 0.28 cP

How does viscosity affect fluid dynamics?

Fluids with high viscosity flow slower and experience greater resistance, while low-viscosity fluids flow more easily. This impacts everything from river currents to oil pipelines.