I would like to include a complicated boundary conditions in my calculations. I would like to add a region in space where laser field exists and once the particle is in the laser field the collision with the gas particles will have larger momentum due to the different temperature resulted from the absorption of laser intensity.
Is it possible in openLB?
since you want to consider a volume with this laser fields, a boundary condition probably is not enough.
Which method are you using for the simulation of the particle?
If you are using a continuous field for the particle like in the eulerEuler bifurcation3d example the solution is probably to apply a different diffusion coefficient in the respective region.
If you are using a discrete representation like in the eulerLagrange bifurcation3d example you could introduce an additional force, describing the impact of the mentioned laser field.