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Butane

02/18/2021 11:01 AM

Does anybody have Sutherland's constant for butane viscosity? I have a number of his constants, but not butane. I have checked the index in Perry's Chemical h'book, CRC Chemistry and physics h'book, as well as Miller's Flow h'book, but can't find any references. I believe that Sutherland produced his figures towards the end of the 1890s and that butane was discovered in the 1840s. I will be grateful for any help.

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#1

Re: Butane

02/18/2021 12:26 PM
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#2
In reply to #1

Re: Butane

02/18/2021 12:59 PM

143.2 Don't know who's constant that is....

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#5
In reply to #2

Re: Butane

02/19/2021 8:44 AM

The best information is given on page A-5 of Crane's Technical paper # 410 M.

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#4
In reply to #1

Re: Butane

02/19/2021 8:40 AM

Thank you for the information. I did look at the gases before I posed the question. Alas, the table did not give Sutherland's constants.

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#3

Re: Butane

02/18/2021 4:17 PM

Here's a way you can compute it.

https://www.engineeringtoolbox.com/butane-C4H10-dynamic-kinematic-viscosity-temperature-pressure-d_2078.html

Select two data points from above plot (Temp, Viscosity)

Convert temperatures from Centigrade to Rankine

R = 9/5 * (C+273)

Solve the equation below for (a/b)

http://hyperphysics.phy-astr.gsu.edu/hbase/Kinetic/visgas.html

(a/b) = (0.555T0 + C)/(0.555T + C)

Solve for C

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#6
In reply to #3

Re: Butane

02/19/2021 8:48 AM

Thank you for your information. It was from Crane's book that I gleaned the information initially. Unfortunately, Crane only gives eight constants. I have accumulated about 20, but butane number still evades me.

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#7
In reply to #6

Re: Butane

02/19/2021 1:09 PM

I solved for C, Sutherlands constant, in post #3 using 2 data points (50C and 200C) from the plot below. (C=352.26)

For C=352.26 C0, I made the following plot using Sutherland's formula:

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#8
In reply to #7

Re: Butane

02/21/2021 4:31 AM

Thank you for the information. I am now a somewhat older but wiser man. You have been a great help.

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