# Surface Tension

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Surface tension, abbreviated as $$\sigma$$ (Greek symbol sigma), is the energy or force at the surface of a liquid that holds it together.

## Formuls that use Surface Tension

 $$\large{ \sigma = \frac{F}{l} }$$ $$\large{ \sigma = \frac{ \rho \; v^2 \; l_c }{ We } }$$ (Weber number)

### Where:

$$\large{ \sigma }$$  (Greek symbol sigma) = surface tension

$$\large{ l_c }$$ = characteristic length

$$\large{ \rho }$$  (Greek symbol rho) = density of mass

$$\large{ F }$$ = force per unit length

$$\large{ l }$$ = length of a surface areas that keep sliding side stationary

$$\large{ v }$$ = velocity of fluid

$$\large{ We }$$ = Weber number