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Viscosity Measurements (contd.) #4452291
07/07/17 12:22 PM
07/07/17 12:22 PM
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
MolaKule Offline OP
MolaKule  Offline OP
Joined: Jun 2002
Posts: 19,229
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








Last edited by wwillson; 07/09/17 10:33 PM. Reason: add equation image
Re: Viscosity Measurements (contd.) [Re: MolaKule] #4454769
07/09/17 10:23 PM
07/09/17 10:23 PM
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
MolaKule Offline OP
MolaKule  Offline OP
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
Dupe.

Last edited by MolaKule; 07/09/17 10:24 PM.

Reading is fundamental; understanding is not a given ability.
Re: Viscosity Measurements (contd.) [Re: MolaKule] #4454865
07/10/17 12:16 AM
07/10/17 12:16 AM
Joined: Dec 2009
Posts: 25,355
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 25,355
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
Re: Viscosity Measurements (contd.) [Re: MolaKule] #4461816
07/17/17 01:24 PM
07/17/17 01:24 PM
Joined: Mar 2016
Posts: 1,391
Western S.C. since 1996
CR94 Offline
CR94  Offline
Joined: Mar 2016
Posts: 1,391
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 92K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Viscosity Measurements (contd.) [Re: CR94] #4461858
07/17/17 01:42 PM
07/17/17 01:42 PM
Joined: Dec 2009
Posts: 25,355
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 25,355
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
Re: Viscosity Measurements (contd.) [Re: CR94] #4467751
07/23/17 08:00 AM
07/23/17 08:00 AM
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
MolaKule Offline OP
MolaKule  Offline OP
Joined: Jun 2002
Posts: 19,229
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.


Reading is fundamental; understanding is not a given ability.
Re: Viscosity Measurements (contd.) [Re: MolaKule] #4521515
09/20/17 06:06 PM
09/20/17 06:06 PM
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
MolaKule Offline OP
MolaKule  Offline OP
Joined: Jun 2002
Posts: 19,229
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


Reading is fundamental; understanding is not a given ability.
Re: Viscosity Measurements (contd.) [Re: MolaKule] #4522645
09/21/17 09:05 PM
09/21/17 09:05 PM
Joined: Mar 2016
Posts: 1,391
Western S.C. since 1996
CR94 Offline
CR94  Offline
Joined: Mar 2016
Posts: 1,391
Western S.C. since 1996
(.088kg/cms)/(0.000867kg/cm)=101.5 cm/s = 10150 mm/s ??

Last edited by CR94; 09/21/17 09:17 PM.

2011 Toyota Prius now at 92K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Viscosity Measurements (contd.) [Re: MolaKule] #4531623
10/01/17 10:04 PM
10/01/17 10:04 PM
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
bigj_16 Offline
bigj_16  Offline
Joined: Jul 2017
Posts: 1,292
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!

Re: Viscosity Measurements (contd.) [Re: MolaKule] #4704739
03/23/18 10:01 PM
03/23/18 10:01 PM
Joined: Jan 2018
Posts: 232
KS
red7404 Offline
red7404  Offline
Joined: Jan 2018
Posts: 232
KS
iam SO glad this isnt a test. LOL. LOL


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