periodic flows
 

Hi all,

I am modeling a respiratory mask for adsorption of air pollutants,because the act of respiration is not continuous at the time I thaught that I should use periodic flow model in Fluent,But after studing the user guide I saw that apparently in this models the flows should be repeat with geometry of our system not with the time ,Is it right?

Shall i use periodic flows model or not?

Help me please.