|
[Sponsors] |
Modelling a partial slip-wall for polymer extrusion |
![]() |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
![]() |
![]() |
#1 |
New Member
Robert
Join Date: Jan 2019
Posts: 3
Rep Power: 7 ![]() |
Hi,
For an assignment I am trying to model slip for the extrusion of a polymer (so a viscous fluid). I see a lot of models that use the full slip option in ansys (a zero-shear wall), but I think my solution is somewhere in between full stick and a full slip boundary. Consider the case of a simple tube with a pressure inlet and a pressure outlet. For this case I want to create a certain wall boundary condition that calculates, based on the pressure, if the material will stick or if it will slip at the wall. So that I get a similar result as I have sketched in the attachment. The velocities are small so it can be considered as a laminar flow. So first the pressure is high and the material sticks to the wall, but further to the outlet the pressure decreases up to a point where the material starts to slip. The velocity of the material will then increase until a full slip situation is reached. Here the velocity of the material at the wall is equal to the average velocity. Does anyone know if such simulation has been performed before? Or does anyone know how I could model it? Kind regards, Robert |
|
![]() |
![]() |
![]() |
Tags |
extrusion, fluent, polymer, slip, stick |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Reflective wall and non slip condition? | Jaydi_21 | Main CFD Forum | 6 | February 20, 2018 14:43 |
Prism Layers at Slip Wall to Non-Slip Wall Transition | InfernoxCJC | STAR-CCM+ | 4 | November 26, 2017 19:06 |
Wrong flow in ratating domain problem | Sanyo | CFX | 17 | August 15, 2015 06:20 |
Overflow Error in Multiphase Modelling with Two Continuous Fluids | ashtonJ | CFX | 6 | August 11, 2014 14:32 |
Partial slip wall BC | Tim Li | FLUENT | 0 | April 11, 2006 20:46 |