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UN/CEFACT
United Nations Centre for Trade Facilitation and Electronic Business
Trade Facilitation Recommendation N° 20
Units of Measure: Code elements listed by quantities
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Quantity
Level
Cat.
Use
Id.
Name
Convesion factors to SI units (1 unit equals)
Represen.
Symbol
Cross
ref.
CHARACTERISTIC NUMBERS (dimensionless parameters)
Momentum Transport
Reynolds number
1
one
1
853
Euler number
1
one
1
854
Froude number
1
one
1
855
Grashof number
1
one
1
856
Weber number
1
one
1
857
Mach number
1
one
1
858
Knudsen number
1
one
1
859
Strouhal number
1
one
1
860
Transport of Heat
Fourier number
1
one
1
861
Péclet number
1
one
1
862
Rayleigh number
1
one
1
863
Nusselt number
1
one
1
864
Stanton number
1
one
1
865
Transport of Matter in a Binary Mixture
Fourier number for mass transfer
1
one
1
866
Péclet number for mass transfer
1
one
1
867
Grashof number for mass transfer
1
one
1
868
Nusselt number for mass transfer
1
one
1
869
Stanton number for mass transfer
1
one
1
870
Constants of Matter
Prandtl number
1
one
1
871
Schmidt number
1
one
1
872
Lewis number
1
one
1
873
Magnetohydrodynamics
magnetic Reynolds number
1
one
1
874
Alfvén number
1
one
1
875
Hartmann number
1
one
1
876
Cowling number
1
one
1
877
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