[Wut]

Hi

My simulation is the drying process, so i selected droplet particle and enable species transport. In DPM, I use custom law 1 and 2.

Law 1: Heating when Tp < Tvap
Law 2: Vaporization when Tp > Tvap

By drying concept for moisture particle, the Tvap will equal to Twb of hot air. Let say my moisture particle has initial temp 317 K and Twb of hot air is 319 K.
The particle shall be heated up from 317 K to 319 K and after that particle shall have temperature 319 K until end of drying process.
Some paper said this shall use UDF to solve this bug. The below is my UDF code. The key point is I would like to keep particle tempature constant 319 K when using Law2.

#include "udf.h"
#include "dpm.h"
DEFINE_DPM_SWITCH(dpm_switch, p, coupled)
{
Material *m = P_MATERIAL(p);
if(P_T(p) < DPM_VAPOR_TEMP(p, m))
P_CURRENT_LAW(p) = DPM_LAW_INITIAL_INERT_HEATING;
else
P_CURRENT_LAW(p) = DPM_LAW_VAPORIZATION;
}