Device for measuring fiber floc sizes in highly turbulent fiber suspensions

Luciano Beghello*, Martti Toivakka, Dan Eklund, Tom Lindstrom

*Corresponding author for this work

Research output: Contribution to conferencePaper (not published)peer-review

Abstract

A device designed for the measurement of fiber floc sizes in highly turbulent fiber suspensions is shortly described. The measuring principle is based on frequency analysis of a series of digital photos taken on flowing fiber suspensions. The pictures are acquired with a digital camera at actual paper machine consistencies and at well defined flow velocities, up to 7 m/s. Frequency analysis is performed on each picture separately by scanning and Fourier transforming in both machine and cross directions. The average of all spectral densities calculated on all digital pictures in the MD and CD gives us the energy variance at different floc sizes, as well as information about the characteristic floc size of the investigated fiber suspension.

Original languageEnglish
Pages71-76
Number of pages6
Publication statusPublished - 1995
MoE publication typeO2 Other
EventProceedings of the 1995 International Paper Physics Conference - Niagara-on-the-Lake, Can
Duration: 11 Sep 199514 Sep 1995

Conference

ConferenceProceedings of the 1995 International Paper Physics Conference
CityNiagara-on-the-Lake, Can
Period11/09/9514/09/95

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