[aakashrana]

Hi everyone,
I'm simulating flow boiling regime transition through vertical pipe. My case is like, initially pipe is filled with heated air then subcooled water liquid starting to enter from the bottom of the pipe.
I've setup the model using water liquid as a primary fluid but I'm unable to initialize the problem correctly. Fluent taking primary liquid in the whole mesh region and if I give volume fraction of air as 1 during initialization then mixture volume fraction reaching to value 2 and results in floating point exception. Fluent is also not allowing to have air(gas) as a primary fluid and not allowing to patch the primary fluid. I've tried using cell registry also, but initialization result was same.
Please help me out!