ideal fluid vs real fluid-difference between ideal fluid and real fluid
This page compares ideal fluid vs real fluid and mentions difference between ideal fluid and real fluid.
Ideal fluid
• Definition: A fluid is said to be ideal if it is assumed to be both incompressible and non viscous.
• Its bulk modulus is infinite.
• ideal fluid has no surface tension.
• Ideal fluid is a substance which is unable to resist internal shear and tensile
forces.
• Ideal fluid are imaginary and do no exist in nature.
• They have laminar (smooth)flow as shown in the figure.
Real fluid
• Definition: A fluid which is compressible, has viscosity and surface tension, is
known as real fluid.
• Real fluids implies friction effects.
• They have turbulent flow as shown in the figure.
• Examples: kerosene, petrol, castor oil
Tabular difference between ideal fluid and real fluid
Following table summarizes difference between ideal fluid and real fluid.
| characteristic | Ideal fluid | Real fluid |
|---|---|---|
| Compressible | No | Yes |
| viscosity | No | Yes |
| surface tension | No | Yes |
| flow type | laminar | turbulent |
| Friction | No | Yes |
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