Converting dynamic (cP) Viscosity to Kinematic (cst) Viscosity

[BERGSH]

I am working with an equation for an excel spreadsheet. Our brookfield viscometer reads in cP and I need to convert this to cst in order to make a viscosity curve. Any help would be greatly appreciated. Thanks Again

 

[phex]

CentiPoises (cp) = CentiStokes (cSt) x Density

http://www.google.com

--> "dynamic kinematic viscosity" --> first result. this is really lazy.

chris.

 

[katmar]

phex is correct, provided the density is in gram per cubic centimetre or in kg per litre.

I could never remember whether I should multiply or divide by the density, so I included a calculator to do this conversion, using a wide variety of units for the viscosities and density, in my freeware program called Uconeer.

Uconeer can be freely downloaded and used. See

http://www.katmarsoftware.com

 

[rmw]

http://www.graham-mfg.com

has a program for vacuum equipment sizing that has a good conversion function in it, but I would not say as good as Katmar's. I use both, and unless I have the vac-works program open for its mollier function, I go straight to Uconeer.

(btw, I had deleted the older version, and it messed up my icon for the new one, so I needed to download it again.)

Thanks, Harvey.

rmw

 

[25362]

Don't be surprised to find that air (as well as many other gases) has a higher kin. visc. than liquid water!

At 300 K and atmospheric pressure:

Air: 15.7 cSt; liquid water: 0.86 cSt.

Any comment?

 

[jmw]

Yes, curious differences between liquids and gases.
Gases show very significant viscosity change with temperature (due to the increased collisions) but very little with pressure. Note also that viscosity increases with gas temperature and decrease with liquid temperature. Viscosity changes are negligable with pressure for liquids but can decrease significantly for a temperature increase.
Similar differneces (pardon my english!) with density.

JMW

http://www.viscoanalyser.com

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