[Onurozcan]

Hi all,

I am working on heat transfer rate in 3d heat exchanger in fluent.

I have calculated both hi and hd heat transfer coefficicent manually.

But I couldn't put both coefficient in boundary conditions of walls

in DesignModeller , external flow around cylinders is defined fuid and have been created name selection '' wall_thickness_1 and I have defined fluid in pipe and it have been created named selection wall_thickness_11

Moreover shell conduction are defined is for conduction heat transfer rate in wall_thickness_11

How can I give both heat transfer coeff.?

for wall_thickness_1 (that is external section) can I give hd coeff ? and the other one is , for wall_thickness_11 can I give hi coeff?

Kind Regards,