- **Fluent UDF and Scheme Programming**
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- - **UDF for transient conduction.**
(*https://www.cfd-online.com/Forums/fluent-udf/119740-udf-transient-conduction.html*)

UDF for transient conduction.Hi,
I am solving a transient conduction problem when a side of the plate is subjected to time and space varying boundary condition. I am using a udf which is as follows: /************************************************** ******************** UDF for specifying a transient velocity profile boundary condition ************************************************** ********************/ #include "udf.h" DEFINE_PROFILE(temp, t, i) { real x[ND_ND]; real x0, y0, time; face_t f; time = CURRENT_TIME; begin_f_loop(f, t) { F_CENTROID(x,f,t); x0 = x[0]; y0 = x[1]; F_PROFILE(f, t, i) = 100.0*sin(y0)*sin(3.14*time)+200.0*cos(y0)*cos(3.1 4*time); } end_f_loop(f, t) } Now the problem is after solving the problem in fluent, when i monitor the temperature at a point on the surface of the wall, I am not getting the temperature variation as given to the UDF. Does this problem is related to time step i am using? or there is the problem in the UDF? Any help would be appreciated... Thanks.. |

Temp.varying with space and TimeHi Ravindra
Whether you have sorted out the problem with your transient conduction udf? I am looking for a very similar udf for temperature varying with space and time..Could you please forward me the model udf for same. |

Quote:
Have u written ur profile right? i dont c it is a function of x though u've defined x0 u've written it as a function of y only inform d check good luck |

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