SISTEMA INTERNACIONAL |
CEGESIMAL (c.g.s.) |
OTROS |
|
|---|---|---|---|
COEFICIENTE VISCOSIDAD DINÁMICA |
poiseuille [=N.s/m2=kg/(m.s)] |
poise (p) [=dina.s/cm2=0,1 poiseuille] |
centipoise (cP)=0,01 p [=viscosidad del agua a 20ºC] |
COEFICIENTE VISCOSIDAD CINEMÁTICA |
m2/s [=poiseuille/ρ] [densidad ρ=m/V kg.m-3] |
stoke(St) [=cm2/s=poise/ρ] [densidad ρ=m/V g.cm-3] |
cSt=0,01St ; segundos(s)=tiempo de flujo con viscosímetro de copa (ver conversiones abajo) |
FÓRMULAS DE CONVERSIÓN Y RANGOS PARA COPAS DE VISCOSIDAD (t=tiempo de flujo en s ; v=viscosidad en cSt) |
|||
|---|---|---|---|
ASTM D1200 ø2,53 FORD-2 |
v=1,44(t-18,0) [40-100 s / 25-110 cSt] |
DIN 53211 ( ø4) |
v=4,570t-452/t [25-150 s / 90-700 cSt] |
ASTM D1200 ø3,40 FORD-3 |
v=2,31(t-6,58) [20-100 s / 49-220 cSt] |
ASTM D4212 Shell 1 |
v=0,226(t-13) [20-80 s / 2-20 cSt] |
ASTM D1200 ø4,12 FORD-4 |
v=3,85(t-4,49) [20-100 s / 60-370 cSt] |
ASTM D4212 Shell 2 |
v=0,576(t-5) [20-80 s / 10-50 cSt] |
ASTM D4212 Zahn 1 |
v=1,1(t-29) [35-80 s / 5-60 cSt] |
ASTM D4212 Shell 2.5 |
v=0,925(t-3) [20-80 s / 20-80 cSt] |
ASTM D4212 Zahn 2 |
v=3,5(t-14) [20-80 s / 20-250 cSt] |
ASTM D4212 Shell 3 |
v=1,51(t-2) [20-80 s / 30-120 cSt] |
ASTM D4212 Zahn 3 |
v=11,7(t-7,5) [20-80 s / 100-800 cSt] |
ASTM D4212 Shell 3.5 |
v=2,17(t-1,5) [20-80 s / 40-170 cSt] |
ASTM D4212 Zahn 4 |
v=14,8(t-5) [20-80 s / 200-1200 cSt] |
ASTM D4212 Shell 4 |
v=3,45(t-1) [20-80 s / 70-270 cSt] |
ASTM D4212 Zahn 5 |
v=23t [20-80 s / 400-1800 cSt] |
ASTM D4212 Shell 5 |
v=6,5(t-1) [20-80 s / 125-520 cSt] |
ISO 2431 ø3 |
v=0,443t-200/t [30-100 s / 5-42 cSt] |
ASTM D4212 Shell 6 |
v=16,2(t-0,5) [20-80 s / 320-1300 cSt] |
ISO 2431 ø4 |
v=1,370t-200/t [30-100 s / 35-135 cSt] |
||
ISO 2431 ø5 |
v=3,280t-220/t [30-100 s / 100-350 cSt] |
||
ISO 2431 ø6 |
v=6,900t-570/t [30-100 s / 190-680 cSt] |
||