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#4452291 - 07/07/17 12:22 PM Viscosity Measurements (contd.)
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA
Viscosity measurements can be made by a number of different methods and instruments.

Here, we use one of the older methods, the Vertical "Falling Ball" viscosimeter.

This instrument explores the effects of gravity, and the hydrodynamics of buoyancy, fluid drag, and Reynolds Numbers.

One of the many references can be found at:

Falling Ball Experiment

This exercise is open to all, but let's let our newer members have the first "crack" at it. cool









Edited by wwillson (07/09/17 10:33 PM)
Edit Reason: add equation image

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#4454769 - 07/09/17 10:23 PM Re: Viscosity Measurements (contd.) [Re: MolaKule]
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA
Dupe.


Edited by MolaKule (07/09/17 10:24 PM)

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#4454865 - 07/10/17 12:16 AM Re: Viscosity Measurements (contd.) [Re: MolaKule]
Garak Offline


Registered: 12/05/09
Posts: 24574
Loc: Regina, Saskatchewan, Canada


Rounded to two significant figures, assuming I didn't fat finger something along the way....
_________________________
Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515

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#4461816 - 07/17/17 01:24 PM Re: Viscosity Measurements (contd.) [Re: MolaKule]
CR94 Offline


Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
I thought you were going to ask us to derive the equation. That might be a little harder than plugging in numbers.
_________________________
2011 Toyota Prius now at 88K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K

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#4461858 - 07/17/17 01:42 PM Re: Viscosity Measurements (contd.) [Re: CR94]
Garak Offline


Registered: 12/05/09
Posts: 24574
Loc: Regina, Saskatchewan, Canada
If he does, I don't think I'll be doing a bunch of formula code, you'd have to put up with my handwriting. wink
_________________________
Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515

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#4467751 - 07/23/17 08:00 AM Re: Viscosity Measurements (contd.) [Re: CR94]
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA
Originally Posted By: CR94
I thought you were going to ask us to derive the equation. That might be a little harder than plugging in numbers.


This is part of the series of QOTD's dealing with viscosity and viscosity measurements.

No derivation since this has already been done.

Just solve for viscosity using the data given.

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#4521515 - 09/20/17 06:06 PM Re: Viscosity Measurements (contd.) [Re: MolaKule]
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA
I almost forgot about this little exercise, waiting for more responses.

Garak had the correct answer as the Absolute Viscosity is 0.0088 kg/m.s. or 0.088 kg/cm.s

Congrats go to Garak.


If anyone would like to convert this to Kinematic Viscosity in cSt you would get extra credit and a extra dip of ice cream of your choice. banana

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#4522645 - 09/21/17 09:05 PM Re: Viscosity Measurements (contd.) [Re: MolaKule]
CR94 Offline


Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
(.088kg/cms)/(0.000867kg/cm)=101.5 cm/s = 10150 mm/s ??


Edited by CR94 (09/21/17 09:17 PM)
_________________________
2011 Toyota Prius now at 88K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K

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#4531623 - 10/01/17 10:04 PM Re: Viscosity Measurements (contd.) [Re: MolaKule]
bigj_16 Offline


Registered: 07/03/17
Posts: 1267
Loc: Douglas County, Colorado
A long, long time ago ago in a far, far galaxy I used the vertical falling ball viscosimeter. Thanks for the memories!

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#4704739 - 03/23/18 10:01 PM Re: Viscosity Measurements (contd.) [Re: MolaKule]
red7404 Offline


Registered: 01/24/18
Posts: 175
Loc: KS
iam SO glad this isnt a test. LOL. LOL

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