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Droplet Impact on Structured surfaces UDF. — Ansys Learning Forum

Droplet Impact on Structured surfaces UDF.

usamausama Member Posts: 79

Dear Ansys Community, hope you shall be in good health. i need help because i am facing some problem regarding droplet impact on the structured surface.

i am doing a 3D simulation for analysis of droplet spreading behavior on the structured surface.

i have written the udf is attached in the pictures.

To get spreading behavior/spreading factor/liquid-air interface the


r[i]=e[0]; "

is used in the udf.

1) the problem i am facing right now when the droplet hits the structured surface the fluent crashes every time.

2) if I remove that command mentioned above in the udf the fluent runs perfectly.

can you help me to fix this issue?

I need to use this command to get the spreading factor of the droplet impact.

i also attached the udf pictures and geometry pictures in the form pictures.

please reply urgently.

i have a due date of the project in my University.


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