Fluent专家

evaporation and condensation.rar

液体水-水蒸汽udf.txt

watervapor.c.txt

wb.rar

wb11.rar

Fluent专家-udf-1

(液体的蒸发相变模拟)

案例简介

本案例对二维容器内水的蒸发相变过程进行模拟分析，容器底部被持续加热，容器内装满水，液面为自由液面，与底部接触的水蒸发形成水蒸汽气泡，并逐渐上窜至液面逸出，属于动态变化过程。

本案例通过udf来定义了水与水蒸汽之间的转换。

视频教程播放地址：http://www.jishulink.com/college/video/c10217

水蒸汽质量分数动画

水和水蒸汽速度分布云图

udf-vapor水和水蒸汽

#include "udf.h"

#include "sg_mphase.h"

#define T_SAT 373

#define LAT_HT 3.e3

real a;

DEFINE_SOURCE(liq_src, cell, pri_th, dS, eqn)

{

  Thread *mix_th, *sec_th;

  real m_dot_l;

  mix_th = THREAD_SUPER_THREAD(pri_th);

  sec_th = THREAD_SUB_THREAD(mix_th, 1);

  a=C_T(cell, mix_th);

  if(C_T(cell, mix_th)>=T_SAT){

    m_dot_l = -0.1*C_VOF(cell, pri_th)*C_R(cell, pri_th)*

                fabs(C_T(cell, pri_th) - T_SAT)/T_SAT;

    dS[eqn] = -0.1*C_R(cell, pri_th)*

      fabs(C_T(cell, pri_th) - T_SAT)/T_SAT;

                               }

  else {

    m_dot_l = 0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)*

                fabs(T_SAT-C_T(cell,mix_th))/T_SAT;

    dS[eqn] = 0.;

       }

  return m_dot_l;

}

DEFINE_SOURCE(vap_src, cell, sec_th, dS, eqn)

{

  Thread * mix_th, *pri_th;

  real m_dot_v;

  mix_th = THREAD_SUPER_THREAD(sec_th);

  pri_th = THREAD_SUB_THREAD(mix_th, 0);

  if(C_T(cell, mix_th)>=T_SAT){

    m_dot_v = 0.1*C_VOF(cell, pri_th)*C_R(cell, pri_th)*

                fabs(C_T(cell, mix_th) - T_SAT)/T_SAT;

    dS[eqn] = 0.;

                               }

  else {

    m_dot_v = -0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)*

                fabs(T_SAT-C_T(cell,mix_th))/T_SAT;

    dS[eqn] = -0.1*C_R(cell, sec_th)*

      fabs(C_T(cell, sec_th) - T_SAT)/T_SAT;

       }

  return m_dot_v;

}

DEFINE_SOURCE(enrg_src, cell, mix_th, dS, eqn)

{

  Thread *pri_th, *sec_th;

  real m_dot;

  pri_th = THREAD_SUB_THREAD(mix_th, 0);

  sec_th = THREAD_SUB_THREAD(mix_th, 1);

  if(C_T(cell, mix_th)>=T_SAT){

    m_dot = -0.1*C_VOF(cell, pri_th)*C_R(cell, pri_th)*

                fabs(C_T(cell, pri_th) - T_SAT)/T_SAT;

    dS[eqn] =  -0.1*C_VOF(cell, pri_th)*C_R(cell, pri_th)/T_SAT;

                               }

  else {

    m_dot = 0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)*

                fabs(T_SAT-C_T(cell,mix_th))/T_SAT;

    dS[eqn] = -0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)/T_SAT;}

  return LAT_HT*m_dot;

}

udf-进口速度

#include "udf.h"

DEFINE_PROFILE(inlet_x_velocity, thread, index)

{

  real x[ND_ND];

  real y, h;

  face_t f;

  h=1; /*inlet height in m*/

  begin_f_loop(f, thread)

  {

   F_CENTROID(x, f, thread);

   y=1.-x[1]/h;

   F_PROFILE(f, thread, index)=2*(1.0-y*y);

   }

   end_f_loop(f, thread)

}

视频教程播放地址：http://www.jishulink.com/college/video/c10217