17 March 2017

Difference between viscosity and density

Viscosity and density are two very useful properties in describing the statics and dynamics of these substances while viscosity and density are both the same thing expressed in different forms truly different concepts.

What is Viscosity?

The viscosity is a measurement of the intermolecular forces and molecule shapes denote as μ.

What is Density?

The density is a measurement of the molecular weight of the composition denotes as ρ.

 Let us have a deep insight into the difference between viscosity an density. 

Difference : 
  • Density says how much mass occupies a certain volume while viscosity is how well a liquid sticks together.
  • Viscosity is the thickness or thinness of fluid while density refers to the space between its particles.
  • Viscosity asked you the friction between two layers of the given fluid while density varies slightly with temperature. 
  • Density and viscosity decrease with temperature, but viscosity has an exponential relationship and density has a linear relationship with temperature.
  • Viscosity is applied for only fluids whereas density applied for all three types solid, liquid, gas.
  • Viscosity is a physical property while density is a material property.
  • Viscosity is how fast the particles move where density is how many particles are in it.
  • A fluid with higher density will transition to turbulent flow quicker, and fluid with higher viscosity will have that transition later. so in a sense, they are inversely proportional.
Both of two properties are very different concepts, but together they can describe more than half of fluid's characteristics.

You can also want to know the difference between related terms like the difference between viscosity and friction.