[kmandar]

Hi,

I wanted to make sure that I am interpreting the output from SU2 correctly.

The flow.dat file has nondimensional values, calculated based on the reference values provided in the configuration files, right?

For example, for naca0012 quick start example, I have:

-- Reference values:
Reference specific gas constant: 287.058 N.m/kg.K.
Reference pressure: 101325 Pa.
Reference temperature: 288.15 K.
Reference density: 1.22498 kg/m^3.
Reference velocity: 287.603 m/s.
Reference energy per unit mass: 82715.8 m^2/s^2.

Since the example is for steady state 2D Euler computation, the (nondimensional) output variables are: Cons_1 (rho), Cons_2 (rhou), Cons_3 (rhov), Cons_4 (rhoet), p, T, Cp, M

So, I should get the dimensional output from these nondimensional values as:
p_dimensional = p*101325;
T_dimensional = T*288.15;

rho_dimensional = Cons_1*1.22498; (Because Cons_1 = rho)
rhou_dimensional = Cons_2*1.22498*287.603; (Because Cons_2 = rhou)
rhov_dimensional = Cons_3*1.22498*287.603; (Because Cons_3 = rhov)
rhoet_dimensional = Cons_4*82715.8; (Because Cons_4 = rhoet)

And finally I can get
u_dimensional = rhou_dimensional/rho_dimensional;
.. and so on

Is the above method correct way of obtaining dimensional values?




I realized that the following do not match:
rho_dimensional = 1.225476862346285 (as calculated above)
and
p_dimensional/(T_dimensional * 287.058) = 1.225474987792910

The two numbers should be equal, but they match only up to 5 decimals.

Am I doing the correct things here?

Thanks,
Mandar

[awendorff]

This is done in solve_direct_mean.cpp. Look at lines 1958-2662. Primarily look at the places where variable_Ref where variable could be energy, length, density, etc. is set.

[kmandar]

Thanks, that helps!