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ConsistentUnits Command

This command determines the units used for all input commands:

ConsistentUnits <(length)>,<(mass)>,<(time)>

where (length), (mass), and time give the units used for length, mass, and time in the input commands. Only metric options are allowed as follows:

The command requires all three arguments or no arguments. If no arguments are used, the units are SI units (m, kg, and s).

If an input file has no ConsistentUnits command, the input file is assumed be using "Legacy" units, which are units used prior to availability of this command. Legacy units are mostly millimeters, grams, and seconds, but not exclusively. You may need to check each specific command to make sure you provide parameters in the correct units.

Units

The following table lists possible units needed for entering parameters. The first column gives the name and its definition in terms of length (L), mass (M), time (T), and degrees Kelvin (K). The second column lists how to enter those terms in Legacy units mode. The third column lists SI or kg-m-s units. The remaining columns give consistent units for various units modes (you are not limited to these modes). To get property in selected units mode, multiply SI-units property by factor in column for that mode. The "Alt" units entries only differ from their normal units when using Legacy mode.

UnitLegacySI (kgms)mmgscgsmmgms
Length (L)mmmx103=mmx102=cmx103=mm
Mass (M)gkgx103=gx103=gx103=g
Time (T)ssssx103=ms
Alt Timemssssx103=ms
Density (M/L3) g/cm3kg/m3x10-6=g/mm3x10-3=g/cm3x10-6=g/mm3
Velocity (L/T)mm/sm/sx103=mm/sx102=cm/sm/s
Alt Velocitym/sm/sx103=mm/sx102=cm/sm/s
Acceleration (L/T2)mm/s2m/s2x103=mm/s2x102=cm/s2x10-3=mm/ms2
Force (F=M-L/T2)NNx106=μNx105=dyneN
Pressure (P=F/L2=M/(L-T2))MPaPaPax10=Bax10-6=MPa
Linear Momentum (M-L/T)N-sN-sx106=μN-sx105=dyne-sx103=N-ms
Alt Strain%nonenonenonenone
Energy (E=F-L=M-L2/T2)JJx109=nJx107=ergx103=mJ
Alt EnergyμJJx109=nJx107=ergx103=mJ
Torque (F-L=M-L2/T2)JJx109=nJx107=ergx103=mJ
Angular Momentum (M-L2/T)J-sJ-sx109=nJ-sx107=erg-sx106=μJ-s
Energy Release (E/L2=M/T2)J/m2J/m2x103=mJ/m2x103=erg/cm2x10-3=kJ/m2
Stress Intensity (P-L0.5=M/(L0.5-T2))MPa-m0.5Pa-m0.5x31.623=Pa-mm0.5x102=Ba-cm0.5x3.1623e-5=MPa-mm0.5
Viscosity (P-T=M/(L-T))cPoisePa-sPa-sx10=Poisex10-3=kPa-s
Diffusion (L2/T)mm2/sm2/sx106=mm2/sx104=cm2/sx103=mm2/ms
Solvent Flux (M/(L2-T))kg/(m2-s)kg/(m2-s)x10-3=g/(mm2-s)x10-1=g/(cm2-s)x10-6=g/(mm2-ms)
Conductivity (E/(L-K-T)=M-L/(T3-K))W/(m-K)W/(m-K)x106=μW/(m-K)x105=erg/(cm-K-s)x10-3=kW/(m-K)
Heat Capacity (E/(M-K)=L2/(T2-K))J/(kg-K)J/(kg-K)x106=μJ/(kg-K)x104=erg/(g-K)J/(kg-K)
Heat Flux (E/(T-L2)=M/T3)W/m2W/m2x103=mW/m2x103=erg/(cm2-s)x10-6=MW/m2
Heat of Fusion (E/M=L2/T2)J/kgJ/kgx106=μJ/kgx104=erg/gJ/kg