$ cd ..
Void Fraction Slip Model
Compute gas void fraction and mixture density from quality, density ratio, and slip ratio.
visual calculatorMultiphase Flow
Read the flow shape before trusting the number.
This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.
01
input scale
02
model
03
check
void fractionslip ratiotwo-phase flowmixture density
formula
KaTeX rendered
ASCII source
alpha = 1 / [1 + ((1-x)/x)(rho_g/rho_l) S]liquid holdupgas void
void fraction alpha
0.9899
mixture density (kg/m3)
11.285
homogeneous alpha
0.9932
slip correction
-0.0033
Even tiny gas quality can occupy most of the pipe volume when gas density is low.