The effects of swirl vanes and a vortex stabilizer on the dynamic flow field in a cyclonic separator

2022 ◽  
Vol 248 ◽  
pp. 117099
Author(s):  
Gustavo E.O. Celis ◽  
Juliana B.R. Loureiro ◽  
Paulo L.C. Lage ◽  
Atila P. Silva Freire
Keyword(s):  
Flow Field ◽  
Dynamic Flow

scholarly journals Impact of Powder Properties on the Rheological Behavior of Excipients

Pharmaceutics ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1198
Author(s):  
Pauline H. M. Janssen ◽  
Sébastien Depaifve ◽  
Aurélien Neveu ◽  
Filip Francqui ◽  
Bastiaan H. J. Dickhoff
Keyword(s):  
Flow Field ◽  
Rheological Behavior ◽  
Quality By Design ◽  
Filling Process ◽  
Dynamic Flow ◽  
Die Filling ◽  
Flow Characterization ◽  
Wide Range ◽  
Powder Properties ◽  
The Impact

With the emergence of quality by design in the pharmaceutical industry, it becomes imperative to gain a deeper mechanistic understanding of factors impacting the flow of a formulation into tableting dies. Many flow characterization techniques are present, but so far only a few have shown to mimic the die filling process successfully. One of the challenges in mimicking the die filling process is the impact of rheological powder behavior as a result of differences in flow field in the feeding frame. In the current study, the rheological behavior was investigated for a wide range of excipients with a wide range of material properties. A new parameter for rheological behavior was introduced, which is a measure for the change in dynamic cohesive index upon changes in flow field. Particle size distribution was identified as a main contributing factor to the rheological behavior of powders. The presence of fines between larger particles turned out to reduce the rheological index, which the authors explain by improved particle separation at more dynamic flow fields. This study also revealed that obtained insights on rheological behavior can be used to optimize agitator settings in a tableting machine.

A Moving Interior Boundary Method Fitted Dynamic Mesh for the Simulation of Flow through Moving Bodies

2011 ◽  
Vol 320 ◽  
pp. 319-324
Author(s):  
Mao Deng ◽  
Zong Ming Wang ◽  
Chun Xue Zhang
Keyword(s):  
Flow Field ◽  
Porous Material ◽  
Numerical Technique ◽  
Dynamic Mesh ◽  
Dynamic Flow ◽  
Mesh Model ◽  
Moving Body ◽  
Interior Boundary ◽  
Flow Through ◽  
Moving Bodies

We present an easy approach to obtain the dynamic flow field with a moving body inside. Instead of popular interface boundaries, the interior boundaries were applied as moving parts, which made separated computation volumes a default-continuum meanwhile. With the combination use of UDF and dynamic mesh model, the numerical technique was tested and validated by simulating flow through moving screen, a kind of porous material. The pressure and velocity contours obtained clearly showed the changing behaviors of the flow while passing through a moving porous material, and clarified the influence posed by the movement of its frame. The method is used for the simulation of the flow with a moving body inside.

scholarly journals Simulation of the dynamic flow field in the left ventricle of the heart during diastolic filling

AIP Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 025221
Author(s):  
Jianhua Adu ◽  
Lixue Yin ◽  
Hongmei Zhang ◽  
Shenghua Xie ◽  
Jing Lu
Keyword(s):  
Left Ventricle ◽  
Flow Field ◽  
Diastolic Filling ◽  
Dynamic Flow

Intercept problem in dynamic flow field

2019 ◽  
Vol 2019 (2) ◽  
pp. 103-112
Author(s):  
B.T. Samatov ◽  
A.I. Sotvoldiyev
Keyword(s):  
Flow Field ◽  
Dynamic Flow

scholarly journals Numerical study of active mixing over a dynamic flow field in a T-jets mixer—Induction of resonance

2016 ◽  
Vol 106 ◽  
pp. 74-91 ◽  
Author(s):  
Ertugrul Erkoç ◽  
Cláudio P. Fonte ◽  
Madalena M. Dias ◽  
José Carlos B. Lopes ◽  
Ricardo J. Santos
Keyword(s):  
Flow Field ◽  
Numerical Study ◽  
Dynamic Flow ◽  
Active Mixing

Numerical Simulation of Dynamic Flow Characteristics in a Centrifugal Water Pump Considering Shaft Torsional Vibration

2017 ◽  
Author(s):  
Shen Lv ◽  
Xiang-Yuan Zhang ◽  
Chen-Xing Jiang ◽  
Wan-You Li ◽  
Zhi-Jun Shuai ◽  
...  
Keyword(s):  
Flow Field ◽  
Torsional Vibration ◽  
Rotation Speed ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Water Pump ◽  
Centrifugal Pumps ◽  
Dynamic Flow ◽  
Rotating Speed ◽  
Speed Fluctuations

The complex three-dimensional turbulent flow field in a centrifugal water pump is numerically simulated considering torsional vibration of the shaft. The characteristic frequency and the frequency modulation phenomenon is investigated when the fluctuated-rotation-speed is considered. The results show that the amplitude of pressure fluctuation is bigger when the rotating-speed of shaft is unsteady, indicating that the speed fluctuations of impellers intensify the nonuniformity and instability of the whole flow field inside the pump. Besides, the Blade Passing Frequency (BPF) has obvious sidelobe frequency peaks when different frequency rate of speed appears. It can be concluded that sidelobes maybe come from the torsional vibration of the shaft. The main findings of this work can provide prediction of the pump performance and information for further optimal design of centrifugal pumps as well.

Static and dynamic flow field development about a porous suction surface wing

1992 ◽  
Author(s):  
GREGORY ADDINGTON ◽  
SCOTT SCHRECK ◽  
MARVIN LUTTGES
Keyword(s):  
Flow Field ◽  
Dynamic Flow ◽  
Suction Surface ◽  
Field Development

scholarly journals A numerical simulation on the electro-hydro-dynamic flow field in electrostatic precipitators

1997 ◽  
Vol 17 (Supplement1) ◽  
pp. 265-268
Author(s):  
Kazuhiro Murai ◽  
Yousuke Kawashima ◽  
Tsuyoshi Okamoto
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Dynamic Flow ◽  
Electrostatic Precipitators
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