Surface Tension

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

surface tension 1Surface tension, abbreviated as \( \sigma \) (Greek symbol sigma), is the energy or force at the surface of a liquid that holds it together.

 

Surface tension formula

\(\large{ \sigma = \frac{F}{l}   }\) 

\(\large{ \sigma =   \frac{ \rho \; v^2 \; l_c }{ We }   }\) 

Symbol English Metric
\(\large{ \sigma }\)  (Greek symbol sigma) = surface tension \(\large{\frac{lbf}{ft}}\) \(\large{\frac{N}{m}}\)
\(\large{ l_c }\) = characteristic length \(\large{ ft }\)  \(\large{ m }\) 
\(\large{ \rho }\)  (Greek symbol rho) = density of mass \(\large{\frac{lbm}{ft^3}}\)  \(\large{\frac{kg}{m^3}}\)  
\(\large{ F }\) = force per unit length \(\large{ lbf }\) \(\large{N}\)
\(\large{ l }\) = length in which force acts \(\large{ ft }\) \(\large{ m }\)
\(\large{ v }\) = velocity of fluid \(\large{\frac{ft}{sec}}\)  \(\large{\frac{m}{s}}\) 
\(\large{ We }\) = Weber number \(\large{ dimensionless }\)  

 

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Tags: Strain and Stress Equations Force Equations Soil Equations