Learning Forum

[kouassi.kouame]

Hi everyone !

I want to set an UDF with this expression of the pressure P(i+1) = P(i) + .....

The issue  : i can't acces to the previous pressure. 

Someone here have any idea to do this ? 

[Amine Ben Hadj Ali]

Previous pressure at pressure time step?

[kouassi.kouame]

Yes, previous pressure at the previous time step .

Can you help me ? 

regards

[kouassi.kouame]

I did this : 

the probleme is that my code always use the initial pressure. He doens't actualise the pressure with the pessure time step.

[kouassi.kouame]

this the snde part of the code : 

[Amine Ben Hadj Ali]

You can store the pressure in cell memory and then access it as previous value before updating the cell memory. OR check the customization manual regarding previous time step cell variables. You always need to check if the data is valid or not.