Units of viscosity in this journal paper

siw · February 26, 2024, 05:46

I came across this journal paper by C. P. Ellis, The Variation of Gaseous Viscosity With Temperature, South African Journal of Science, April 1962, pp 115-120 (URL https://tsapps.nist.gov/publication/...?pub_id=907539).

In this paper is a table of viscosities as a function of temperature for various gases. I am uncertain of the units of the viscosity values It could all be non-dimensionalized, but if that is the case then I cannot find the reference viscosity used. Does anyone know this? Thanks.

LuckyTran · February 26, 2024, 06:54

The units of the paper you link are clearly labeled in the table as micro-Pascal seconds, which is the most commonly used SI measure for viscosity. But this paper is not the one you cited.

siw · February 26, 2024, 08:23

That's the problem of having too many tabs open in the internet browser

The journal paper in question is at https://journals.co.za/doi/pdf/10.10520/AJA00382353_987

LuckyTran · February 26, 2024, 09:18

The viscosities are in miliPoise, mP. You can tell because air has viscosity of 17.2 µPa*s at 0 °C

February 26, 2024, 05:46	Units of viscosity in this journal paper	#1
siw Senior Member Stuart Join Date: Jul 2009 Location: Portsmouth, England Posts: 735 Rep Power: 25	I came across this journal paper by C. P. Ellis, The Variation of Gaseous Viscosity With Temperature, South African Journal of Science, April 1962, pp 115-120 (URL https://tsapps.nist.gov/publication/...?pub_id=907539). In this paper is a table of viscosities as a function of temperature for various gases. I am uncertain of the units of the viscosity values It could all be non-dimensionalized, but if that is the case then I cannot find the reference viscosity used. Does anyone know this? Thanks.

February 26, 2024, 09:18		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,676 Rep Power: 66	The viscosities are in miliPoise, mP. You can tell because air has viscosity of 17.2 µPa*s at 0 °C siw likes this.

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February 26, 2024, 06:54		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,676 Rep Power: 66	The units of the paper you link are clearly labeled in the table as micro-Pascal seconds, which is the most commonly used SI measure for viscosity. But this paper is not the one you cited.

February 26, 2024, 08:23		#3
siw Senior Member Stuart Join Date: Jul 2009 Location: Portsmouth, England Posts: 735 Rep Power: 25	That's the problem of having too many tabs open in the internet browser The journal paper in question is at https://journals.co.za/doi/pdf/10.10520/AJA00382353_987