[CHUIKOV]

Dear all,

I'm modelling a gas nozzle with added lagrangian particles (representing micron sized metallic particles). The domain includes internal and external zones. The particles are injected after a certain time, when the flow is in a stable state.

The gas is in a compressible, transient regime, including turbulence. Up to now I have included the lagrangian particles, using reactingParcelFoam solver, in the absence of external heat sources and results look reasonable.

Now I want to include an external radiation source (laser beam) to heat the lagrangian particles. The radiation source has been measured experimentally. I have a text file with the following structure: x y z irradiance (W/m2). I have created a cellSet for the interaction volume.

I'm wondering what's the best way to tackle this problem. Since the gas can be considered transparent to the radiation, I have been looking into binaryAbsorptionEmission as shown in the tutorial SimpliedSiwek. This allows to define one set of optical properties for the gas (in my case set to none) and other set for the dispersed phase, However, the dimensions of absorptivity and emissivity are 1/m, while I need to define the absorption coeffient in % of the incident field and also a dimensionless emissivity.

Is it possible to use an fvOption only for the lagrangian phase? I would like to avoid expensive fvDOM models if possible.

I'm using ESI 2012 version.

many thanks in advance!