[anirudh1]

Hello,
I'm simulating early diesel injection with narrow angle injection. I have used DIESEL2 as parcel species. Due to early injection, a fuel film is formed on piston surface, so i have used wall-film model in converge to simulate this and also ticked the film-evaporation. But from the results the film on surface seems to vaporize only a little. I'm attaching the film_mass from film.out, Near-wall avg temperature for piston boundary, and also mean_temp inside cylinder. Piston boundary condition is law of wall and temperature boundary condition is 480K. Mesh size near piston wall is 0.25mm.

Do i need to refine the mesh further near wall?
Is the film model accurate ?
Why only a little of the film is vaporized ?

Kindly help.

Thanks and regards
Anirudh.

filmmass_piston.PNG

Mean_Temperature.PNG
Near_wall_avg_piston.PNG