[Milad.m]

Hello everyone.


Right now I'm working on a spray cooling case targeting a hot wall utilizing DPM method. Droplets reaching the wall are forming a liquid film with defining a Lagrangian wall film (LWF) boundary. The domain consists of a large continuous fluid phase (air, in which the water droplets are injecting in) and a solid box with a heat energy source term. Between these two there is a coupled wall in order to simulate conjugate heat transfer between the wall and the formed film.


The problem is as the simulation begins, wall temperature values begin to diverge and oscillate between very high and low (even 1K) values. When the wall is defined with simple heat flux value or on the other hand when it's DPM boundary is defined other options (like rebound) everything works fine but LWF model along with coupled wall doesn't result to a certain valid values and the simulation diverges.


Does anybody have faced same problem before? or on contrary, have anybody implemented these two conditions (LWF and Coupled wall) along each other successfully?


Regards.