2.6.3 Heat Exchange

The heat transfer from the fibers to the surrounding flow is computed in ANSYS FLUENT by balancing the change of the fiber energy as it crosses each control volume in the ANSYS FLUENT model. It considers sensible as well as latent heat transfer due to evaporation of solvent in dry spinning applications and is computed as

where
	$\alpha$	=	heat transfer coefficient
	$T_{ref}$	=	reference temperature
	$C_{{p}_{s,v}}$	=	specific heat capacity of solvent vapor
	$\vec{F}_f$	=	momentum exchange of fiber $f$

This heat exchange appears as a source in the surrounding fluid energy balance and is taken into account during every continuous phase computation. It can be reported as described in Section  3.9.2.