Abstract
The prediction of the turbulent flow of a viscoelastic fluid is required for engineering applications. We applied a Reynolds stress model proposed (for Newtonian fluid) by Hanjalic & Jakirlic (1998). This model can predict a turbulent flow in a Newtonian fluid with precision. In the viscoelastic turbulence, we should model an additional nonlinear term of fluctuating strain and conformation tensor in the ensemble-averaged constitutive equation. In the present model of the nonlinear term, we investigated the model parameters in order to adjust them to the adopted background Reynolds stress model aiming at a better prediction of the mean velocity profile. The present model can predict mean velocity profile better than earlier model by Leighton et al. (2003). The optimal values of model parameters were found to depend on either the friction Reynolds number or Weissenberg number. The relationships between the model parameters and flow parameters are formulated. Moreover, we tried introducing a viscoelastic pressure strain term, since the anisotropy of the Reynolds normal stress is significant character in the drag-reducing flow.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The Proceedings of the Fluids engineering conference
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
