Study on the Mixing Characteristics of Dilution Water in the Distribution Pipe of Hydraulic Headbox
Author(s): KANG Guobing
Pages: 1-5
Year: 2014 Issue: 1
Journal: Journal of Guangdong Industry Technical College
Keyword: headbox; dilution water; mixing; numerical simulation;
Abstract: The method of adjusting the local concentration is taken by hydraulic headbox to control the basis weight in cross direction .In this paper , the turbulence model of Realizable κ-ε was adopted to simulate the mixing of dilution water with stock .The results of simulation are consistent with that of experiment .Reverse vortex pair is the main form of dilution water diffuses in stock .The result shows dilution water and stock mix quickly in near field of jet point, but in the downstream, the mixing parameters ( M) keeps comparatively steady when z >7d.This illustrates the speed of mixing decreases gradually .In the downstream , the dilution get more even with distance increases.Increasing the incidence speed of dilution water is good for mixing effect .
Pages: 1-5
Year: 2014 Issue: 1
Journal: Journal of Guangdong Industry Technical College
Keyword: headbox; dilution water; mixing; numerical simulation;
Abstract: The method of adjusting the local concentration is taken by hydraulic headbox to control the basis weight in cross direction .In this paper , the turbulence model of Realizable κ-ε was adopted to simulate the mixing of dilution water with stock .The results of simulation are consistent with that of experiment .Reverse vortex pair is the main form of dilution water diffuses in stock .The result shows dilution water and stock mix quickly in near field of jet point, but in the downstream, the mixing parameters ( M) keeps comparatively steady when z >7d.This illustrates the speed of mixing decreases gradually .In the downstream , the dilution get more even with distance increases.Increasing the incidence speed of dilution water is good for mixing effect .
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