Bulk Modulus

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

bulk modulusBulk modulus, abbreviated as B or K, also called bulk modulus of elasticity, is the elastic relationship between an applied pressure that acts to change the volume of the substance and the ability of a substance to withstand changes in volume when under compression.


Bulk Modulus formulas

\(\large{ K =    p\;  \frac {V_i}{ V_c }     }\)   
\(\large{ K = \frac { 1 }{ \beta }     }\)  
\(\large{ K =  \frac {v^2 \; \rho}  { Ca }  }\)  (Cauchy number)


\(\large{ K }\) = bulk modulus

\(\large{ V_c }\) = change in volume (volume differential)

\(\large{ Ca  }\) = Cauchy number

\(\large{ \beta }\)   (Greek symbol beta) = compressibility

\(\large{ p  }\) = pressure

\(\large{ v  }\) = velocity of flow

\(\large{ V_i }\) = initial volume


Tags: Equations for Pressure Equations for Strain and Stress Equations for Modulus