[skumar112]

Hi I am trying to model a droplet containing particles within a flow, I am trying to model the moisture content of the DPM Droplets so that once the liquid has vaporized the law is no longer active and so that I can modify the droplet properties as its composition changes. However once the moisture content of the droplet is 0 the evaporation stops. but the entire droplet is getting vaporized and I dont know why. The DPM switch I am using switch between laws is, where TP_USER_REAL(tp,0) is the moisture content:

Material *m = TP_MATERIAL(tp);
if (TP_USER_REAL(tp,0) > 0.)
{
TP_CURRENT_LAW(tp) = DPM_LAW_USER_1;
}
if (TP_USER_REAL(tp,0) == 0.)
{
TP_CURRENT_LAW(tp) = DPM_LAW_INITIAL_INERT_HEATING;
}

[edris3320]

hi
did you solve your problem? because i have your problem
can you help me?
thanks a lot

[2phase]

As far as I have used droplets, they only consist of a single liquid phase.
That said: if they have no more moisture Content, they have no content at all, or am I wrong here?

If I were right, then you have to stop evaporation before the drop is evaporated and therefore removed from the Domain. There, you should consider time step size and evaporation rate for the switch criterion, as the Limit should not be too small and the drop might disappear within this very timestep.

Perhaps it would be an Option to go for multicomponent drops.

Good luck
Martin

[vinerm]

Yes, as Martin mentioned, when droplet is the selected type of particle, then it consists of only one material. If it evaporates, whole of it will evaporate until user stops it by lowering the temperature. If, on the other hand, the particle contains volatile material, then it needs to be handled as multicomponent particle. This type of particle is made up of at least two materials. One component could evaporate while the other may not.