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Novel Contact Forces for Immersed Boundary Paper Forming Simulations

Gustav Kettil (Institutionen för matematiska vetenskaper, matematik) ; Andreas Mark (Institutionen för tillämpad mekanik, Strömningslära) ; Frida Svelander (Institutionen för matematiska vetenskaper, matematik) ; Ron Lai ; Lars Martinsson ; Kenneth Wester ; Mats Fredlund ; Maria Rentzhog ; Ulf Nyman ; Johan Tryding ; Fredrik Edelvik (Institutionen för produkt- och produktionsutveckling)
Online proceedings: http://tappi.sclivelearningcenter.com/; PF2 - The Past, Present and Future of CFD Papermaking; PaperCon 2015 Atlanta April 19-22 (2015)
[Konferensbidrag, refereegranskat]

To be able to simulate the different processes involved in paper machines, models, numerical methods and algorithms have to be developed which capture as much as possible of the real physical phenomena. In this paper a model for calculation of the chemical and physical interaction between objects included in a fiber suspension is presented. The contact force model is based on DLVO theory [1, 2] and uses so-called contact points distributed along the fiber suspension objects. The contact model has been used in an existing framework to simulate the build-up of low density paper webs. In the framework fibers are modeled as elliptical cylinders whose movements are described by finite-strain beam theory which includes shearing. The fluid flow is computed using a Navier-Stokes solver and immersed boundary methods are utilized to resolve the flow around each fiber. For validation, the air permeability and thickness of the paper webs have been measured and compared with simulated data. The result demonstrates that the software can be used to simulate paper forming.

Nyckelord: contact forces, fiber interaction, fiber suspension, immersed boundary methods



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Denna post skapades 2015-09-10. Senast ändrad 2016-07-01.
CPL Pubid: 222192

 

Institutioner (Chalmers)

Institutionen för matematiska vetenskaper, matematik (2005-2016)
Institutionen för tillämpad mekanik, Strömningslära
Institutionen för produkt- och produktionsutveckling

Ämnesområden

Produktion
Matematik
Beräkningsmatematik
Strömningsmekanik
Pappers-, massa- och fiberteknik

Chalmers infrastruktur