[saidc.]

Hi,

When IATE diameter model is used for gas phase on phaseProperties, it calls kappai dictionary for boundary and initial condition.
So if I use this model I've to modifie kappai.gas dictionary. There is a description on IATE.H file for kappai and it says:

 "Interfacial curvature (alpha*interfacial area)"
Unit is m^-1

Also, there is an equation on .C file:

// Construct the interfacial curvature equation
    fvScalarMatrix kappaiEqn
    (
        fvm::ddt(kappai_) + fvm::div(phase_.phi(), kappai_)
      - fvm::Sp(fvc::div(phase_.phi()), kappai_)
     ==
      - fvm::SuSp(R, kappai_)
    //+ Rph() // Omit the nucleation/condensation term
      + fvOptions(kappai_)
    );

Then, I checked tutorials that uses IATE model to see how they initialize and which boundaries used and I saw some strange numbers on Initial Condition like 13333 and 2000 (Interfacial curvature (alpha*interfacial area) ???).
How they obtain these numbers? I couldn't reached to the original paper that referred on source code (Ishii, M., Kim, S. and Kelly, J., (2005)). Maybe in the paper there is an explanation. But I found some others that might be related to Ishii et al. (2005).

Ishii, M., Kim, S., & Uhle, J. (2002). Interfacial area transport equation: model development and benchmark experiments. International Journal of Heat and Mass Transfer, 45(15), 3111-3123. https://doi.org/10.1016/S0017-9310(02)00041-8.
--------------------------------------------------------
Kocamustafaogullari, G., & Ishii, M. (1995). Foundation of the interfacial area transport equation and its closure relations. International Journal of Heat and Mass Transfer, 38(3), 481-493. https://doi.org/10.1016/0017-9310(94)00183-V.

However, I still don't have a clue. Any theorical and mathematical explanation would be appretiated.

Best regards,
Saidc.

[Raphael_Santos]

Hi Saidc,

have you find any reference about what is "kappai" and best way to set the values?

Regards,
Raphael

[saidc.]

Originally Posted by Raphael_Santos

Hi Saidc,

have you find any reference about what is "kappai" and best way to set the values?

Regards,
Raphael

Hi Raphael,

Unfortunately I couldn't find any explanation.

Said,
Regards