[srinath]

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

[Shoonya]

It is dynamic viscosity mu in MKS (kg/m-s)

dinesh
IIT Kanpur

[dangtruon]

By the way, I would like to know is there density parameter in thermophysicalProperties dictionary? Where is it?
Thanks

[Shoonya]

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,

[dangtruon]

Thank dinesh2n

[ang_dipl_ing_fd]

i know, the answer comes late, but i think it is the enthalpy in J/kg.

[charitonas]

hi,

Do you know where does the dt and end time came from in these cases?

thanks

[Sachin m]

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.

[rkpk]

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?

[Leckie]

Originally Posted by rkpk

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?

@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.