Dimensionless Number |
Symbol |
Formula |
Numerator |
Denominator |
Importance |
Reynolds number |
NRe |
Dvr/m |
Inertial force |
Viscous force |
Fluid flow involving viscous and inertial forces |
Froude number |
N_{Fr} |
u^{2}/gD |
Inertial force |
Gravitational force |
Fluid flow with free surface |
Weber number |
N_{We} |
u^{2}rD/s |
Inertial force |
Surface force |
Fluid flow with interfacial forces |
Mach number |
N_{Ma} |
u/c |
Local velocity |
Sonic velocity |
Gas flow at high velocity |
Drag coefficient |
C_{D} |
F_{D}/(ru^{2}/2) |
Total drag force |
Inertial force |
Flow around solid bodies |
Friction factor |
f |
t_{w}/(ru^{2}/2) |
Shear force |
Inertial force |
Flow though closed conduits |
Pressure coefficient |
C_{P} |
Dp/(ru^{2}/2) |
Pressure force |
Inertial force |
Flow though closed conduits. Pressure drop estimation |
Last Modified on: 14-Sep-2014
Chemical Engineering Learning Resources - msubbu
e-mail: msubbu.in[AT]gmail.com
Web: http://www.msubbu.in