气体压缩FLUENT模拟UDF
#include "udf.h"
/* Define which user-defined scalars to use. */
enum
{
p,ads,d_ads,q_ads,H_ad
};
DEFINE_ADJUST(p_absolute, domain) //计算每个单元绝对压力，并存储
{
Thread *t;
cell_t c;
real p_operating;
real p_static;
/* solve the absolute pressure. */
thread_loop_c (t,domain)
{
if (NULL != THREAD_STORAGE(t,SV_UDS_I(p)))
{
begin_c_loop (c,t)
{
p_static=C_P(c,t);
p_operating = RP_Get_Real("operating-pressure");
C_UDSI(c,t,p) = p_static+p_operating;
}
end_c_loop (c,t)
}
}
}
DEFINE_ADJUST(Heat_Adsorption, domain) //计算每个单元绝对压力，并存储{
Thread *t;
cell_t c;
real p_operating;
real p_static;
/* solve the absolute pressure. */
thread_loop_c (t,domain)
{
if (NULL != THREAD_STORAGE(t,SV_UDS_I(H_ad))&&
NULL != T_STORAGE_R_NV(t,SV_UDSI_M1(H_ad)))
{
begin_c_loop (c,t)
{
C_UDSI(c,t,H_ad)=3080*sqrt(log(71.6/C_UDSI_M1(c,t,ads)));
}
end_c_loop (c,t)
}
}
}
DEFINE_ADJUST(adsorption, domain) //通过D_A方程计算每个单元吸附量并存储{
Thread *t;
cell_t c;
real n_o;
real E_t;
real x_p;
real A;
real x_b;
real n;
/* solve the adsorption equation. */
thread_loop_c (t,domain)
{
if (NULL != THREAD_STORAGE(t,SV_UDS_I(ads))&&
NULL != T_STORAGE_R_NV(t,SV_UDSI_M1(ads)))
{
begin_c_loop (c,t) //D_A方程
{
real tem=C_T(c, t);
n_o=71.6;
E_t=3080+18.9*tem;
x_p=1.47E9/C_UDSI(c,t,p);
A=8.31429*tem*log(x_p);
x_b=-A*A/(E_t*E_t);
C_UDSI(c,t,ads)=n_o*exp(x_b);
}
end_c_loop (c,t)
}
}
}
DEFINE_ADJUST(q_adsorption, domain) //计算LDF模型中每个单元的qn
{
Thread *t;
cell_t c;
/* solve the absolute pressure. */
thread_loop_c (t,domain)
{
if (NULL != THREAD_STORAGE(t,SV_UDS_I(q_ads))&&
NULL != T_STORAGE_R_NV(t,SV_UDSI_M1(q_ads)))
{
begin_c_loop (c,t) //LDF模型
{
real physical_dt;
physical_dt = RP_Get_Real("physical-time-step");
C_UDSI(c,t,q_ads)=C_UDSI_M1(c,t,q_ads)+0.15*physical_dt*(C_UDSI_M1(c,t,ads)-C_U DSI_M1(c,t,q_ads));
}
end_c_loop (c,t)
}
}
}
DEFINE_ADJUST(d_adsorption, domain) //计算每个单元的原项
{
Thread *t;
cell_t c;
/* solve the energy source. */
thread_loop_c (t,domain)
{
if (NULL != THREAD_STORAGE(t,SV_UDS_I(d_ads))&&
NULL != T_STORAGE_R_NV(t,SV_UDSI_M1(d_ads)))
{
begin_c_loop (c,t)
{
C_UDSI(c,t,d_ads)=-0.532224*0.15*(C_UDSI(c,t,ads)-C_UDSI(c,t,q_ads));
}
end_c_loop (c,t)
}
}
}
DEFINE_SOURCE(mass_source,c,t,dS,eqn) //定义质量原项
{
real m_source;
m_source=C_UDSI_M1(c,t,d_ads);
dS[eqn] = 0.0;
return m_source;
}
DEFINE_SOURCE(energy_source,c,t,dS,eqn) //定义能量原项
{
real e_source;
e_source=-C_UDSI_M1(c,t,d_ads)*0.496056352e3*3080*sqrt(log(71.6/C_UDSI_M1(c,t,ads))); dS[eqn] = 0.0;
return e_source;
}