# Sutherland's Law - Helium

 Register Blogs Members List Search Today's Posts Mark Forums Read

 July 26, 2002, 13:58 Sutherland's Law - Helium #1 Nashat Ahmad Guest   Posts: n/a Hi, I was wondering if someone knew the constant in the Sutherland's relation for Helium gas. Thanks in advance, Nashat

 July 28, 2002, 02:58 Re: Sutherland's Law - Helium #2 Rami Guest   Posts: n/a Hi Nashat, I do not have exactly the data you ask for, but can suggest the following way to get it: o Data for He may be found in http://properties.nist.gov/SemiProp/Gases/He.html o Choose a reference temperature and its associated viscosity. o Assume a value for the missing parameters, S. o Use a least-squares curve fit to find the value of S that most closely follows the experimental data from NIST. I hope this helps.

 July 28, 2002, 15:45 Re: Sutherland's Law - Helium #3 Peter Guest   Posts: n/a I found the formula for the air: nul=1.486*10e-6*(T^1.5)/(110.6+T) for the Helium shouldn't be far. Take a look at Schlichting or A. Walz. "Boundary Layers of flow and Temperature". M.I.T. Press. 1969

 July 29, 2002, 04:55 Re: Sutherland's Law - Helium #4 Salvador Guest   Posts: n/a Use Lennard-Jones potentials, more data available and more accurate

 July 29, 2002, 08:29 Re: Sutherland's Law - Helium #5 Alexandre Chatelain Guest   Posts: n/a Here are the constants of the Sutherland law for Helium : mu0 = 3.93267e-5 T0 = 809 C0 = 147.2 Hope it helps someone. Alexandre Chatelain. PhD student - LES of Heat Transfer. CEA Grenoble - LEGI/Most Team - FRANCE.

 July 29, 2002, 10:46 Re: Sutherland's Law - Helium #6 Nashat Ahmad Guest   Posts: n/a Thanks a lot for your replies. I'll give the data from NIST a try. Thanks Rami. Nash'at

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post John FLUENT 16 September 12, 2015 06:18 Michael Main CFD Forum 8 February 27, 2015 06:06 RyGuy FLUENT 4 June 28, 2012 02:07 Poly FLUENT 0 March 24, 2005 16:12 rookie FLUENT 0 June 16, 2003 11:41

All times are GMT -4. The time now is 21:20.