

	Mekanik In English

Projekt

Computing the flow of a stratified headbox.

Forskningsområde:

Strömningsmekanik

Projektmedlemmar:

Dahlkild, A. A.

Parsheh, M.

Finansiär:

Faxén Laboratoriet

Projektbeskrivning

Using the commercial fluid dynamics software CFX, we have modeled the mixing of the different layers of a three-layer stratified headbox jet. We have studied the transport of a passive scalar component dyed into the middle fluid layer to the other layers. It has been found that vane length has considerable and vane tip shape has little effect on mixing. Vanes shorter than the headbox cause less mixing and vanes longer than the headbox cause more mixing. Parallel slice lips worsens the mixing. Furthermore, the nozzle angle was changed and the optimum angle was found to be between 8-11 degrees.

Publikationer relaterade till projektet

År	Titel
2009	Mixing Layers in Sink Flow: Effect of Length of Flight on Mixing in a Channel Downstream Flow Turbulence and Combustion Volume 82, Issue3 407 (Publicerad)
2009	Evolution of flat plate wakes in sink flow J. Fluid Mech. 626 241-262 (Publicerad)
1999	Modelling the flow around elastic guiding vanes and turbulence in a two-dimensional contraction. Proceedings of TAPPI Engineering Conference, Anaheim (Publicerad)
1997	Numerical moddeling of mixing in a stratified headbox jet. Proceedings of TAPPI Eng. Conf, Nashville, USA (Publicerad)

Interna rapporter relaterade till projektet

År	Titel	Dokumenttyp
2001	Flow in contractions with application to headboxes	Doktorsavhandling
1999	Aspects of boundary layers, turbulence and mixing in a plane contraction with elastic guide vanes, envisaging potential application to paper manufacturing.	Licentiatavhandling