i want to incorporate variable fluid property in fluent my question is how do i achieve it. i am new user of fluent. the AIM is to evalute all physical properies of fluid at every node, after every iteration, and use it for next iteration. can UDF do this

Yes, I think a UDF may do it. You have to select user-defined for each variable thermo-physical property. in the Material panel.

Sincerely, Saad