Experimental study of the forming process: Fluid velocity and fluid-fiber interaction measurements
2008 (English)Conference paper (Refereed)
A study of the flow in the direct vicinity of a forming wire and a fiber network during forming is reported. The measurements are performed with Particle Image Velocimetry in a scaled system. Index-of-refraction matching is used to gain optical access to the flow. Time resolved measurements of the flow velocity in the vertical and horizontal direction is obtained in a plane with a size of 60 × 40 fiber diameters. The spatial resolution is 2 fiber diameters. Data is obtained for three drainage velocities and two different lengths of the fibers. The relative level of the velocity fluctuations are found to decrease with drainage velocity and is higher in the flow above a network mat of shorter fibers compared to the network made of longer fibers. The size of the flow structures is obtained by spectral analysis and compared for the six cases.
Place, publisher, year, edition, pages
2008. 1145-1176 p.
, TAPPI Press - Paper Conference and Trade Show, PaperCon '08, 2
A-plane, Drainage velocity, Experimental studies, Fiber diameters, Fiber interactions, Fiber networks, Fluid velocities, Forming process, Optical access, Particle image velocimetries, Spatial resolution, Spectral analysis, Time resolved measurement, Velocity fluctuations, Exhibitions, Flow visualization, Spectrum analysis, Spectrum analyzers, Velocity, Fibers
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-154128ScopusID: 2-s2.0-70349443547ISBN: 9781605605104OAI: oai:DiVA.org:kth-154128DiVA: diva2:756523
Paper Conference and Trade Show, PaperCon '08; Dallas, TX; United States; 4 May 2008 through 7 May 2008
QC 201410172014-10-172014-10-142014-10-17Bibliographically approved