plasma 等离子体射流的 体积力——UDF实现
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#include "udf.h" 
 #include "math.h"
 #include "sg_udms.h"
 #define debye 0.001
 #define rhomax 0.0008
 #define phimax 5000
 #define sigma 0.003
 #define rholoc 0.5enum { 
 phi,
 rho
 };enum { 
 Ex,
 Ey,
 Fx,
 Fy,
 Fm
 };%%%%% CALCULATION OF ELECTRIC FIELD STRENGTH %%%%%%%%%%%%% DEFINE_ADJUST(udf_adjust, domain) 
 {
 Thread *t;
 cell_t c;thread_loop_c(t,domain) 
 {
 begin_c_loop(c,t)
 {
 C_UDMI(c,t,Ex)=-C_UDSI_G(c,t,phi)[0];
 C_UDMI(c,t,Ey)=-C_UDSI_G(c,t,phi)[1];
 }
 end_c_loop(c,t)
 }
 }%%%%% DEFINITION OF SOURCE OF HELMHOLTZ EQUATION %%%%%%% DEFINE_SOURCE(rho_source, c, t, dS, eqn) 
 {
 real source;
 source=-pow(debye,-2)*C_UDSI(c,t,rho);
 dS[eqn]=-pow(debye,-2);
 return source;
 }%%%%%%%%%%%%%% DEFINITION OF X-MOMENTUM SOURCE TERM %%%%%%%% DEFINE_SOURCE(X_Source, c, t, dS, eqn) 
 {
 real Sourcex;
 Sourcex=-rhomaxphimaxC_UDSI(c,t,rho)C_UDSI_G(c,t,phi)[0];
 dS[eqn]=-rhomaxphimax;
 C_UDMI(c,t,Fx)=Sourcex;
 return Sourcex;
 }%%%%%%%%%%%%%%%% DEFINITION OF Y-MOMENTUM SOURCE TERM %%%%%%%% DEFINE_SOURCE(Y_Source, c, t, dS, eqn) 
 {
 real Sourcey;
 Sourcey=-rhomaxphimaxC_UDSI(c,t,rho)C_UDSI_G(c,t,phi)[1];
 dS[eqn]=-rhomaxphimax;
 C_UDMI(c,t,Fy)=Sourcey;
 C_UDMI(c,t,Fm)=sqrt(C_UDMI(c,t,Fx)*C_UDMI(c,t,Fx)+C_UDMI(c,t,Fy)*C_UDMI(c,t,Fy));
 return Sourcey;
 }%%%%%%%%%%%%%%%%%%%%% DISTRIBUTION FUNCTION ON WALL %%%%%%%%%%%%%%%%%%%% DEFINE_PROFILE(rho_profile,thread,i) 
 {
 float r[3];
 float x;
 real xloc;
 face_t f;begin_f_loop(f,thread) 
 {
 F_CENTROID(r,f,thread);
 xloc = r[0];
 F_PROFILE(f,thread,i)=exp(-pow((xloc-rholoc),2)/(2*pow(sigma,2)));
 }
 end_f_loop(f,thread)
 }这是国外毕业论文里的UDF( Master of Science Thesis : Master of Science ThesisModeling of Dielectric-Barrier Discharge ActuatorImplementation, validation and generalization of an electrostatic model),模拟一对电极的等离子体,如下图 
  现在遇到的问题是,不确定在fluent中定义的x和y的动量source term是否正确。 
 (1)加载UDF后,定义UDM和UDS的数量,5和2.
    (2)定义x、y动量源项 
  y动量源项一样的操作 y动量源项一样的操作
 (3)定义 User Scalar 0 和 1?这个步骤我不太确定
  所以在UDF中, rho_source和rho_profile在fluent中应该如何使用呢?请教下各位前辈,谢谢! 
 
			