Karthik R


I'm not completely familiar with the physics when it comes to micro and macro porosity defect. But, if I were to take a guess, it is caused by air / gas entrained when the alloy is solidifying. Because of this, I'm thinking you might have to enable the multiphase model here. 

To get better clarity, please have a look at published literature on how to model this in Fluent. There are numerous publications in this area which use Fluent as the modeling tool

Hope this helps.