I even tried injecting particle[ entrained droplet] at the middle of the domain by following UDF[it's part here]
angle = acos(pos/r);
x_inj = r*cos(angle);
y_inj = r*sin(angle);
z_inj = pos;
Injection:[ inside DEFINE_DPM_INJECTION_INIT]
Still, it's showing no Film DPM mass source. What might be the reason? Does ANSYS really count Film DPM mass source for the injection defined by DEFINE_DPM_INJECTION_INIT macros? Because when I have a surface injection with fixed droplet mass flow rate at inlet ANSYS print info [ like injection N particle, escape n, absorbed n..] in the console window. But, for DEFINE_DPM_INJECTION_INIT , ANSYS shows no information in the console window.
Moreover, will you add more words like the type of injection, and surface for the 2nd and 3rd method mentioned in your last comment?