Hii friends, i ahve to model superheater tube bundles in a steam furnace considcering the radiation view factors also.i already have the combustion analysis of flue gases inside the furnace. i am unable to conceptualize the design of the superheaters inside the furnace. i need to design atleast 4 tubes to study the effect of high temp on the steam flow. How shal i incorporate the tubes inside the furnace model in Ansys ICEM, also during analysis using CFX 5.7 i am not able to understand how to consider the domain and sub domains in the model.

Kindly help

Create tubes using cylindrical surfaces without considering thickness. While specifying mesh parameters, tick on "internal wall" & "split wall". Create two different bodies, one representing fluid in furnace & other representing fluid in tubes.

Thus you should be able to model & mesh your domains.

Only doubt I have is, how will you create two different domains in CFX representing two different fluids?

Kind regards, Chirag

two different fluid??!!