porous_plug.c

fluent培训教程中的udf例子和说明

/*******************************************************************/
/*                                                                 */
/* Position-Dependent Porous Media                                 */
/*                                                                 */
/* FLUENT 5.0 Version                                              */
/* Author Jay Sanyal                                               */
/* Fluent Inc.                                                     */
/*                                                                 */
/*******************************************************************/


#include "udf.h"

DEFINE_SOURCE(xmom_source, cell, thread, dS, eqn)

{
#define c2 100.0

real x[ND_ND];
float con, source;

  C_CENTROID(x, cell, thread);
  con = c2*0.5*C_R(cell, thread)*x[1];
  
      source = - con*fabs(C_U(cell, thread))*C_U(cell, thread);

      dS[eqn] = - 2.*con*fabs(C_U(cell, thread));
    
  return source;
}