Fluid domain composed of 3 subdomains...
 

Hello,

I have problem with defining the fluid domain composed of 3 subdomains, these subdoimains are divided as "slag", "reductor" and "matte". Thing is that i can define domain as "bath" , but it is known that most of chenical reactions happens on border of layers, which volume are not known at the start, these domains are varying volume domains to actual state of the system. Is there any possibility (there is for sure :)) to define problem like that ? Should i divide that domain to 3 domains explicitly ?