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[求助] 壁面热流条件随温度变化udf

我目前研究的是pvt空冷系统,下表面冷却,亦即一个长方体空气通道,上表面是pv板,由于要考虑pv板对外界环境的散热和产生的电能两部分热量,所以打算用吸收的太阳辐射热量减去这两部分值得到我要的热流值,所以编程,现改编程如下,大神们有什么问题吗

#include"udf.h"
#define I 677
#define Ta 20
#define η 0.15
real ave_temp=300.0;
DEFINE_PROFILE(heat_flux,t,i)
{
   real NV_VEC(A);
   real sum_T_A=0.0;
   real sum_A=0.0;
   Thread *thread_top;
   face_t f;
   begin_f_loop(f,thread_top)
{
  F_AREA(A,f,thread_top);
  sum_A+=NV_MAG(A);
  sum_T_A+=NV_MAG(A)*F_T(f,thread_top);
}
  end_f_loop(f,thread_top)
  ave_temp=sum_T_A/sum_A;
  F_PROFILE(f,t,i)=0.855*I*sum_A-2.8*(ave_temp-Ta)*sum_A-η*(1-0.0045*(temp-298.15))*I*sum_A;
}
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