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Fluids

Fluids

Topics related to Fluent, CFX, Turbogrid and more.

UDF DEFINE INIT

    • joce0001
      Subscriber

      I have a fluid whose temperature varies depending on the height, I have made the UDF, I have compiled, but I do not know how to enter this UDF as an initial condition, because in the Solution Initialization section there is no way to select UDF.

      The UDF programming is as follows

      #include "udf.h"

      DEFINE_INIT(temperatura_profundidad, domain)
      {
          cell_t cell;
          Thread *thread;
          real x[ND_ND];  /* Vector de posición */
          real profundidad;
          real temperatura;

          /* Loop sobre todas las celdas en el dominio */
          thread_loop_c(thread, domain)
          {
              begin_c_loop(cell, thread)
              {
                  C_CENTROID(x, cell, thread);  /* Obtener las coordenadas del centroide de la celda */
                  profundidad = x[1];  /* Asumiendo que la coordenada y representa la profundidad */
                  temperatura = -7.1 * profundidad + 298;  /* Aplicar la fórmula de temperatura en función de la profundidad */
                  C_T(cell, thread) = temperatura;  /* Definir la temperatura de la celda */
              }
              end_c_loop(cell, thread)
          }


      }

    • Rob
      Forum Moderator

      https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v232/en/flu_udf/flu_udf_ActivatingGeneralSolverUDFs.html%23flu_udf_sec_use_init

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