Home page > Research groups > 2nd Group: Surface treatment processes > Themes of research > Arc and thermal spraying processes, nano- or micro-structured deposits > Etudes des arcs électriques en courant continu : instabilités générées > Numerical study of the plasma jet behavior
Numerical study of the plasma jet behavior
|Mohamed El GANAOUIemail@example.com|
Use of “lattice Boltzmann” – like resolution methods to simulate atmospheric blown plasma jets for spray process.
In a scientific context in which flow modeling seems to be a well-resolved issue thanks to the growing power of computing machinery and the improvement of numerical technologies, new calculation concepts are appearing. Typically, these are resolution methods initially resulting from the cellular robot technology (lattice gas) and whose autonomous theoretical development has been growing for about twenty years. They are named “Lattice Boltzmann method” (LBM)
These algorithms create a keen interest because of:
These methods seem to be absolutely usable to simulate a plasma jet of thermal spraying along with the interaction with the carried powdery matter.
However, in practice, a few problems are remaining, as for instance:
These are problems for the scientific community, and we have proposed some solutions based on the example of a binary gas jet (argon-hydrogen) immersed in a similar atmosphere. To do so, we have modified the standard equation of the LBM model for the jet asymmetry to be considered. The turbulence is represented according to a Smargorinsky model and thermodynamics and gas transportation properties are extracted from T&TWinner (http://ttwinner.free.fr).
According to the first conclusions, these methods seems to be competitive with those already existing in Jet&Poudres (see figure 1, figure 2) and additional performance gains are expected concerning the representation of jets seeded with particles.
|Figure 1 – Temperature mapping from Jet&Poudres code (above) et LBGK (below).||Figure 2 – Temperature mapping of an impinging jet, normal to the target, from LBGK D2Q9 lattice with a Smagorinsky’s model of turbulence (Csmag=0.18 and Prt=0.3).|
The activity of the scheme focuses on these following points:
|Updated March 23, 2010|