[pitch]

Originally Posted by vinerm

What I meant is that you keep your code as it but use a smaller time-step in Run Simulation panel. As far as using profile is concerned, do not use the UDF. Use only the profile and check if it works.

yes i observe some effects of the source. but after third iter source is not 0.

[vinerm]

Source will not be 0 after 3 iterations but after 0.03 s. If time-step is 0.003 s then it will take 10 time-steps.

[pitch]

Originally Posted by vinerm

Source will not be 0 after 3 iterations but after 0.03 s. If time-step is 0.003 s then it will take 10 time-steps.

because i used this
((sourcex transient 3 0)
(time
0
0.002
0.003
)
(src
900.0
1000.0
0.0
))

[vinerm]

If time-step is 0.001, then it will take 3 time-steps. If time-step is 0.003, then it will take one time-step. But it is not connected with iterations.

[pitch]

Originally Posted by vinerm

If time-step is 0.001, then it will take 3 time-steps. If time-step is 0.003, then it will take one time-step. But it is not connected with iterations.

yes after the third step
so where is the mistake?

[vinerm]

Most likely in the calculations of your UDMs. Use your source code but instead of using UDM, just use a constant source between 0 and 0.02 s and 0 value after that. If that works, then it is UDM that is problematic. You can also check the same by plotting contours for UDMs. Contours should show plausible values.

[pitch]

Originally Posted by vinerm

Most likely in the calculations of your UDMs. Use your source code but instead of using UDM, just use a constant source between 0 and 0.02 s and 0 value after that. If that works, then it is UDM that is problematic. You can also check the same by plotting contours for UDMs. Contours should show plausible values.

the Udm countor is ok the problem is in source i think its not switching its just 0 if i remove the if statement in source it will take udm value

[vinerm]

Not the counter but it's value. UDM is supposed to have value varying across domain. Go to contours and plot the UDM that you are assigning as source. If it shows 0, then you know the reason.

[pitch]

Originally Posted by vinerm

Not the counter but it's value. UDM is supposed to have value varying across domain. Go to contours and plot the UDM that you are assigning as source. If it shows 0, then you know the reason.

The udms show value not zero

[vinerm]

If UDM has value then the source should have it as well. To debug the code, write source values to a text file from within the UDF.