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linjorejoy/inlet_motion_11_0.c

Created June 3, 2022 11:51
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The User Defined Function (UDF) Code used to model the alternating velocity of air flow in the vortex generator created by a sinusoidally oscillating diaphragm.
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inlet_motion_11_0.c
#include "udf.h"
DEFINE_PROFILE(unsteady_velocity,thread,position) {
face_t f;
real t=CURRENT_TIME;
begin_f_loop(f,thread) {
F_PROFILE(f,thread,position)=6*sin(30*t);
} end_f_loop(f,thread)
}
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Info About the Code

Sl No. Code Definition Remark
1 #include "udf.h" file inclusion directive will cause the udf.h file to be included with your source code.
2 DEFINE_PROFILE(unsteady_velocity,thread,position) Custom Boundary Profile define a custom boundary profile that varies as a function of spatial coordinates or time.
unsteady _velocity Parameter of DEFINE_PROFILE Generates profile for X velocity
3 face_t f Data Type face_t is an integer data type that identifies a particular face within a face thread.
4 real t=CURRENT_TIME To look up real flow time Finds real flow time and stores it in variable t
5 begin_f_loop(f,thread) face looping macro loops over all interior and boundary zone faces in a compute node
6 F_PROFILE(f,thread,position)= Define the face for UDF Uses integer position to set X velocity face value in memory
7 6sin(30t) Parameters definition 6: Maximum Velocity in sinusoidal flow(m/s) 30: Frequency of Oscillation(Hz)
8 end_f_loop(f,thread) face looping macro Ends the loop

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References

[1] : UDF User Manual - https://www.afs.enea.it/project/neptunius/docs/fluent/html/udf/node2.htm

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