Essence
Ansys Employee

Yes, epsilon is the turbulent dissipation rate. Please refer to the Ansys guide link:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/flu_th/x1-1810005.20.2.html

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/flu_th/flu_th_sec_turb_scales_SBES.html?q=sbes