[Abose]

Hello,
I am currently trying to simulate a wall fire on a PMMA surface using the solver FireFOAM. I am attaching the case study( http://dx.doi.org/10.1016/j.applthermaleng.2017.11.041 ). I am trying to affect only the surface where I have to specify mass flux. I am trying to find a way how we can do that, but I am stuck. The mass flux is supposed to be at the interface and will depend on the heat flux incident on the surface.

There is one other way that has been used to simulate a similar case, (https://www.researchgate.net/publica...solid_approach). But I cannot set up this case unless the boundary condition at the interface is known.

How do we set up and implement the case(boundary condition at the interface) on the two cases?