DEFINE_DPM_INJECTION_INIT to change the position of particle

- July 8, 2019 at 9:36 am
  
  pavankonchada123
  Subscriber
  
  Hi
  
  I want to change my position of injection for every time step by a magnitude of 0.0001 in y direction. Is my udf ok
  
  #include "udf.h"
  
  #include "dpm.h"
  
  DEFINE_DPM_INJECTION_INIT(Bahn, I)
  
  {
  
  Particle *p;
  
  real injposition = 0.75;
  
  loop(p,I->p)
  
  {
  
  P_POS(p)[1] = injposition + 0.0001;
  
  injposition = P_POS(p)[1];
  
  } }
- July 10, 2019 at 4:03 pm
  
  Rob
  Forum Moderator
  
  What happens when you try it?
- July 17, 2019 at 9:50 am
  
  pavankonchada123
  Subscriber
  
  It worked when I used current time in it
- July 17, 2019 at 9:51 am
  
  pavankonchada123
  Subscriber
  
  Another doubt, does define_dpm_bodyforce macro helps in defining force on all particles in domain at all instances of time??
- July 17, 2019 at 10:31 am
  
  Rob
  Forum Moderator
  
  It will add a body force whenever it's called at whatever value is defined: you need to specify when it's active and what it does.