PARTICLE CONCENTRATION INFLUENCE ON LIQUID RESIDENCE TIME DISTRIBUTIONS IN A MODEL ASEPTIC PROCESSING SYSTEM

1995 ◽  
Vol 18 (2) ◽  
pp. 119-133 ◽  
Author(s):  
JUN H. LEE ◽  
RAKESH K. SINGH ◽  
D. SCOTT LINEBACK
Keyword(s):  
Residence Time ◽  
Particle Concentration ◽  
Processing System ◽  
Aseptic Processing ◽  
Residence Time Distributions

The Mixing Characteristics and Residence Time Distribution of Cut Tobacco Particles in Drum Mixer

2011 ◽  
Vol 396-398 ◽  
pp. 297-301
Author(s):  
Wen Kui Zhu ◽  
Dong Liu ◽  
Jin Song Du
Keyword(s):  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Plug Flow ◽  
Processing System ◽  
Rotating Speed ◽  
Drum Mixer ◽  
Method Effects ◽  
Residence Time Distributions ◽  
Cut Tobacco

Residence time distributions were determined for the continuous processing of cut tobacco in the rotary drum by introducing expanded cut tobacco tracers to the inlet of the processing system using the negative step change method. Effects of rotating speed of the rotary cylinder and solids flow rate on the mixing homogenization and residence time distribution (RTD) of experiment materials was investigated. PER-CSTR series model and multistage CSTR model were used to fit the experimental results. The result shows mixing homogenization increased significantly with the increasing feeding rate of cut tobacco and decreasing drum rotating speed. PER-CSTR series model is more suitable to describe the RTD characteristics of flow materials in drum. The axis movement of cut tobacco along the drum is approximate to the plug-flow.

Residence time distributions in SX–EW equipment

1998 ◽  
Vol 54 (3-4) ◽  
pp. 235-242 ◽  
Author(s):  
Hossein Aminian ◽  
Claude Bazin ◽  
Daniel Hodouin
Keyword(s):  
Residence Time ◽  
Residence Time Distributions

scholarly journals The impact of rotational speed and water volume on textile translational motion in a front-loading washer

2018 ◽  
Vol 89 (16) ◽  
pp. 3401-3410 ◽  
Author(s):  
Hong Liu ◽  
R Hugh Gong ◽  
Pinghua Xu ◽  
Xuemei Ding ◽  
Xiongying Wu
Keyword(s):  
Residence Time ◽  
Rotational Speed ◽  
High Speed ◽  
Translational Motion ◽  
Processing System ◽  
Water Volume ◽  
Motion Path ◽  
Rotational Axis ◽  
Passive Region ◽  
The Impact

Textile motion in a front-loading washer has been characterized via video capturing, and a processing system developed based on image geometric moment. Textile motion significantly contributes to the mass transfer of the wash solution in porous materials, particularly in the radial direction (perpendicular to the rotational axis of the inner drum). In this paper, the velocity profiles and residence time distributions of tracer textiles have been investigated to characterize the textile dynamics in a front-loading washer. The results show that the textile motion varies significantly with the water volume and rotational speed, and that the motion path follows certain patterns. Two regions are observed in the velocity plots: a passive region where the textile moves up with low velocity and an active region where the textile falls down with relatively high speed. A stagnant area in the residence time profile is observed. This corresponds to the passive region in the velocity profile. The stagnant area affects the mechanical action, thus influencing washing efficiency and textile performance. The findings on textile dynamics will help in the development of better front-loading washers.

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