# Thermophysicalproperties dict entries

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 July 21, 2008, 03:06 Hello I am trying to figur #1 Member   srinath Join Date: Mar 2009 Location: Champaign, USA Posts: 90 Rep Power: 10 Hello I am trying to figure out the entries in thermophysicalproperties If i look at rhoCentralFoam/forwardStep/constant/thermophysicalproperties I find mixture normalisedGas 1 11640.3 2.5 0.0 0.0 1.0; 11640.3gm/mol, seems to be molecular wt of the gas If i assume universal gas constant =8.314, and gamma = 1.4. I can get Cp to be 2.5. and specific gas constant to be .71424 This is consistent with a speed of sound = 1 And all seems well If i look in rhoCentralFoam/shockTube/thermophysicalproperties i find the line mixture air 1 28.96 1004.5 2.544e+06 0.0 1.0; Now, 28.96gm/mol is mol. wt of air 1004.5 = Cp of air, assuming gamma =1.4 But what is 2.544e+06? Could someone please shed some light on this? Thanks Srinath

 July 2, 2010, 23:57 #2 Member   Join Date: Dec 2009 Location: Kanpur, India Posts: 42 Rep Power: 10 It is dynamic viscosity mu in MKS (kg/m-s) dinesh IIT Kanpur

 December 9, 2010, 07:46 Density #3 New Member   Dang Truon Join Date: Jun 2010 Posts: 4 Rep Power: 9 By the way, I would like to know is there density parameter in thermophysicalProperties dictionary? Where is it? Thanks

December 9, 2010, 09:18
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Quote:
 Originally Posted by dangtruon By the way, I would like to know is there density parameter in thermophysicalProperties dictionary? Where is it? Thanks
hi,

in thermophyiscal Properties dictionary, I do not think there is any density peremeter. Only number of moles is there (red one below).

mixture air 1 28.9 1000 0 1.8e-05 0.7;

see the user guide U-177,

 December 14, 2010, 01:21 #5 New Member   Dang Truon Join Date: Jun 2010 Posts: 4 Rep Power: 9 Thank dinesh2n Last edited by dangtruon; December 14, 2010 at 03:05.

 February 21, 2011, 11:07 #6 New Member   Fatih Join Date: Sep 2010 Location: Hamburg Posts: 12 Rep Power: 9 i know, the answer comes late, but i think it is the enthalpy in J/kg.

 June 4, 2014, 10:05 time (dt) #7 New Member   chariton christou Join Date: Feb 2014 Posts: 26 Rep Power: 5 hi, Do you know where does the dt and end time came from in these cases? thanks

 October 28, 2014, 02:41 #8 Member   Sachin Join Date: Aug 2014 Location: India Posts: 46 Rep Power: 5 Has anyone tried the propeller tutorial in openFoam?? If yes let me know how to go about it. My allrun file is not working. So iam trying to run it manually. Can anyone help me out with the steps??? Thanks in advance.

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