Conversion formula for viscosity 1

[asv80]

Hello,

Can anyone give the conversion formula for viscosity - I need to convert Saybolt Second (SSU) to centi Stokes (cSt)? The actual value required is 100 SSU in cSt.

I found some tables on the internet which give the conversion for selected values and also the following formula

SSU = 4.55 * cSt, if cSt > 50.

I would greatly appreciate if there is any analytical expression for this conversion.

Thanks in advance.

 

[electricpete]

Per Juvenal:
k.v. = 0.22 * S – 180/S
Where
k.v. is in cSt
S is in SUS

If you're dealing with anything above 100 SSU ~ 200cSt, the formula simplifies to k.v. ~ 0.22*S



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[electricpete]

Some parantheses for clarification:
k.v. = (0.22*S) – (180/S)

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[electricpete]

Typo correction:
"If you're dealing with anything above 100 SSU ~ 20cSt, the formula simplifies to k.v. ~ 0.22*S"

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[asv80]

electricpete,
thanks for the equation. the simplified equation you have mentioned k.v. ~ 0.22*S is the same as the ones I found at many websites and mentioned in the original post but in reverse as S = 4.55*k.v.

I was looking for a more general formula applicable over a wider range and I think I can you the one without simplification.

thanks.

 

[25362]

You may use:

cS = 0.226 S - 195[&divide;]S for S < 100​

cS = 0.22 S - 135[&divide;]S for S > 100​

where S = SSU

 

[asv80]

thank you 23562