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#1 |
Member
srinath
Join Date: Mar 2009
Location: Champaign, USA
Posts: 91
Rep Power: 17 ![]() |
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 |
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#2 |
Member
Join Date: Dec 2009
Location: Kanpur, India
Posts: 54
Rep Power: 16 ![]() |
It is dynamic viscosity mu in MKS (kg/m-s)
dinesh IIT Kanpur |
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#3 |
New Member
Dang Truon
Join Date: Jun 2010
Posts: 4
Rep Power: 16 ![]() |
By the way, I would like to know is there density parameter in thermophysicalProperties dictionary? Where is it?
Thanks |
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#4 | |
Member
Join Date: Dec 2009
Location: Kanpur, India
Posts: 54
Rep Power: 16 ![]() |
Quote:
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, |
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#6 |
New Member
Fatih
Join Date: Sep 2010
Location: Hamburg
Posts: 12
Rep Power: 16 ![]() |
i know, the answer comes late, but i think it is the enthalpy in J/kg.
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#7 |
New Member
chariton christou
Join Date: Feb 2014
Posts: 26
Rep Power: 12 ![]() |
hi,
Do you know where does the dt and end time came from in these cases? thanks |
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#8 |
Member
Sachin
Join Date: Aug 2014
Location: India
Posts: 84
Rep Power: 12 ![]() |
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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#9 |
New Member
Tejas
Join Date: Dec 2018
Posts: 4
Rep Power: 7 ![]() |
mixture air 1 28.96 1004.5 2.544e+06 0.0 1.0;
while using these properties of air what should be the units of pressure and temperature in 0 folder ? And should should be their initial values? |
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#10 | |
New Member
Join Date: Aug 2022
Location: Mexico
Posts: 16
Rep Power: 4 ![]() |
Quote:
@rkpk did yoy find the answer to your question? I'm on the same boat at the moment. I'm unsure how to simulate a case with my initial parameters of P=2500Pa and T=220K for the first example srinath posted. |
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