Reply To: How to improve the convergence of the EWF model?

[Scott Ormiston]

Thank you for these comments. Does this mean that the EWF is not a subgrid model?  I thought that it solved simplified fluid film equations and applied the film interface velocity to the gas phase wall-adjacent cells and a wall face mass flux instead of volumetric sinks in the wall-adjacent cells.

It is crucial that we get a clear picture of what the EWF model is doing and how to get it to converge as soon as possible. We are presently working on a journal article which assesses CFD code condensation modelling for a vertical channel with conjugate heat transfer to a coolant channel.  We are planning to compare Fluent and STAR-CCM+ for both in-house volumetric sink models (via UDFs and field functions) and built-in fluid film models.  We have everything running except the EWF model. I must say that it will be disappointing if we are forced to omit the EWF from the article.