[tangd]

Could somebody tell me what are the values of Sutherland coefficient As and Sutherland temperature Ts for air? Thanks!

[elmorsli]

For viscosity:
mu=1.4584E-6*pow(T,3./2.)/(T+110.33);

and for thermal conductivity:
lambda=2474.7264e-6*pow(T,3./2.)/(T+194.4)

[tangd]

Thanks for your reply. What are the coefficients As and Ts for N2? Is there a table including the coefficient of all gases?

[TomP]

When using constTransport the conductivity can be calculated based on the viscosity, the heat capacity and the Prandtl number. When using sutherlandTransport there is no mention of the conductivity constant (at least not in the manual). You also give the sutherland coefficients for the conductivity, but then my question is where do I use them? Right after those of the viscosity?

Originally Posted by elmorsli

For viscosity:
mu=1.4584E-6*pow(T,3./2.)/(T+110.33);

and for thermal conductivity:
lambda=2474.7264e-6*pow(T,3./2.)/(T+194.4)

[mohsen cheraghi]

I have the same question. can any one explain more?

[okroud]

Originally Posted by elmorsli

For viscosity:
mu=1.4584E-6*pow(T,3./2.)/(T+110.33);

and for thermal conductivity:
lambda=2474.7264e-6*pow(T,3./2.)/(T+194.4)

I am also interested in the calculation of the thermal conductivity. Is there any more information? Which numbers in the second equation are coefficients, that I have to set in OpenFOAM? Hope anyone can help us!

[immortality]

I don't think conductivity coefficients to be necessary.only As and Ts are important.

[camille131]

Hi,
could you tell me where I can find the sutherland coefficients As and Ts for natural gas (ie: methane). And where can I find a table of these coef. for any gas?
Thank you very much