hi,everyone I have write a udf for the viscous resistance,but when i computer the case,i tell me that error as follows: cpp -ID:\FLUENT.INC\fluent6.2.16/client/src - UDFCONFIG_H="<udfconfig.h>" vr.c Error: vr.c: line 11: parse error. Error: vr.c: line 13: Viscous_Resistance: undeclared variable

the udf file has been given too.any advice will be appreciated.

************************************************** ********************/ /* unsteady.c */ /* UDF for specifying a transient Viscous Resistance boundary condition */ /************************************************** ********************/ #include "udf.h" #include "prop.h" DEFINE_PROPERTY(cell_Vis_Resistance, c, t,position) { { real ti = RP_Get_Real("flow-time"); real Viscous_Resistance(c,t,position)=1.0e+9 +9.9E7*ti; } return Viscous_Resistance }

cell_Vis_Resistance this ust be replaced with Viscous_Resistance

Thanks Q a lot, I have replaced the cell_Vis_Resistance with Viscous_Resistance, but when I integrated the udf the fluent tell warring me that: cpp -ID:\FLUENT.INC\fluent6.2.16/src UDFCONFIG_H="<udfconfig.h>" vr.c Error: vr.c: line 11: parse error. Error: vr.c: line 13: function returning float returns function returning float.

Thanks Q a lot, I have replaced the cell_Vis_Resistance with Viscous_Resistance, but when I integrated the udf the fluent tell warring me that: cpp -ID:\FLUENT.INC\fluent6.2.16/src UDFCONFIG_H="<udfconfig.h>" vr.c Error: vr.c: line 11: parse error. Error: vr.c: line 13: function returning float returns function returning float.