UDS source term as a function of distance => unexpected discontinuous staircase output

- March 18, 2021 at 8:56 am
  
  tpsagaro
  Subscriber
  
  Hi,
  Sure I'm missing something. The purpose is to use a scalar (UDS) with a source term that depends on the horizontal coordinate X (no convection, no diffusion). As a test, I have written the following source term that once compiled generates a non-continuous output showing a staircase behavior at fixed intervals of 1 m. I expected a continuous behavior so I do not know what is wrong here.
  #include "udf.h"
  DEFINE_SOURCE(source_test,c,t,dS,eqn)
  {
  real x[ND_ND];
  real source;
  {
  source = x[0];
  dS[eqn] = 0.;
  }
  return source;
  }
- March 18, 2021 at 11:27 am
  
  tpsagaro
  Subscriber
  
  Solved:nThere should be a:nC_CENTROID(x,c,t); nbelow the: real source; linenAnd initialize the case.n
- March 18, 2021 at 1:11 pm
  
  Karthik R
  Administrator
  
  Glad you were able to resolve. Thank you for posting the answer.nKarthikn

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