Numerical Simulation of Muzzle Exit and Separation Process for Sabot–Guided Projectiles at M > 1

2009 ◽  
pp. 261-269
Author(s):  
Jörn Keuk ◽  
Arno Klomfass
Keyword(s):  
Numerical Simulation ◽  
Separation Process

Numerical simulation of separation process for enhancing fine particle removal in tertiary sedimentation tank mounting adjustable baffle

2017 ◽  
Vol 158 ◽  
pp. 21-29 ◽  
Author(s):  
Hong Guo ◽  
Seo Jin Ki ◽  
Seungjae Oh ◽  
Young Mo Kim ◽  
Semyung Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Fine Particle ◽  
Separation Process ◽  
Particle Removal ◽  
Sedimentation Tank

scholarly journals NUMERICAL SIMULATION OF THE MOVEMENT OF SMOOTH PARTICLES AT THE ELECTROMAGNETIC SEPARATORS WITH DRUM

2016 ◽  
Vol 21 (3) ◽  
Author(s):  
CĂSĂNDROIU TUDOR ◽  
CIOBANU GABRIELA VALERIA ◽  
VIŞAN LIANA ALEXANDRA
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Case Studies ◽  
Surface Condition ◽  
Separation Process ◽  
Free Flight ◽  
Air Resistance ◽  
Sorting Process

The paper presents the main theoretical elements underlying the seeds separation process after their surface. During the seed cleaning and sorting process according to the surface condition machines with electromagnetic or magnetic separators drums are used. In this paper is made a comparative theoretical analyze of smooth seeds movement on electromagnetic drum surface and trajectory in free flight, neglecting and taking into consideration air resistance, detached from the separation drum and it is evaluated the collection area of detached seeds. On this basis, were carried out several case studies and numerical simulations for three different machines.

scholarly journals NUMERICAL SIMULATION OF THE MOVEMENT OF SMOOTH PARTICLES AT THE ELECTROMAGNETIC SEPARATORS WITH DRUM

2015 ◽  
Vol 21 (3) ◽  
pp. 13-21
Author(s):  
TUDOR CĂSĂNDROIU ◽  
GABRIELA VALERIA CIOBANU ◽  
LIANA ALEXANDRA VIŞAN
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Case Studies ◽  
Surface Condition ◽  
Separation Process ◽  
Free Flight ◽  
Air Resistance ◽  
Sorting Process

The paper presents the main theoretical elements underlying the seeds separation process after their surface. During the seed cleaning and sorting process according to the surface condition machines with electromagnetic or magnetic separators drums are used. In this paper is made a comparative theoretical analyze of smooth seeds movement on electromagnetic drum surface and trajectory in free flight, neglecting and taking into consideration air resistance, detached from the separation drum and it is evaluated the collection area of detached seeds. On this basis, were carried out several case studies and numerical simulations for three different machines.

Numerical Simulation for Flow Field in Hydrocyclone

2011 ◽  
Vol 335-336 ◽  
pp. 683-687
Author(s):  
Fu Lun Zhang ◽  
Song Sheng Deng ◽  
Wei Xing Hua
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Flow Field ◽  
Internal Flow ◽  
Euler Method ◽  
Separation Process ◽  
Flow Parameters ◽  
Single Entry ◽  
Conical Section ◽  
The Stability

According to the RNG model and the Euler method, the flow field inside hydrocyclone is simulated by the CFD. The results show that: the internal flow field of the hydrocyclone is quite complicated, which means that the fluid flow parameters in the same location vary widely within different directions, such as track, velocity, separation and so on. The flows of cylindrical section and conical section are very different, at the same time, the main separation process is completed in the conical section. In the hydrocyclone with single entry, the center of the flow field is not in the position of geometric center; which will influence the stability of the flow field and the separation.

Numerical simulation for the separation process of suspended fine sand from oil and water emulsion in a large-size sedimentation tank

2018 ◽  
Vol 115 ◽  
pp. 153-171
Author(s):  
Guoxi He ◽  
Siming Nie ◽  
Liying Sun ◽  
Dongliang Cao ◽  
Kexi Liao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Fine Sand ◽  
Separation Process ◽  
Water Emulsion ◽  
Large Size ◽  
Sedimentation Tank

scholarly journals STUDY OF THE PROCESS OF CALIBRATION OF CONFECTIONERY SUNFLOWER SEEDS

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
I. Shevchenko ◽  
E. Aliiev
Keyword(s):  
Numerical Simulation ◽  
Experimental Verification ◽  
Laser Cutting ◽  
Total Concentration ◽  
Experimental Studies ◽  
Separation Process ◽  
Physical Models ◽  
Sunflower Seeds ◽  
Maximum Productivity ◽  
Total Seed

The aim of the research was to make the mechanical and technological process of calibrating confectionery sunflower seeds with a vibrating sieve more effective by giving reasons for its rational methodical and technological parameters. The study of calibration of confectionery sunflower seeds had two stages: numerical simulation and experimental verification. For the first stage, the physical models for numerical simulation (in the STAR-CCM+ software package) of the movement of seeds with a vibrating sieve were: k-ɛ model of separated flow turbulence, gravity field, Van der Waals real gas model, discrete elements model, multiphase interaction model. The second stage, experimental verification of the models obtained, was carried out on a calibration machine (sizer) OKMF. Sieves of three types were selected: perforated sieves, rod sieves, and precision sieves (produced by laser cutting). The numerical simulation of moving the confectionery sunflower seeds with a vibrating sieve has allowed determining how changes in total concentration and productivity depend on the way of the input of the seeds, the sieve angle, the vibration frequency and vibration amplitude of the sieve. To make the seed separation process effective, the vibrating sieve is to operate with the maximum productivity equal to the seed input (1,202 kg/h), with the maximum total seed concentration (10.83%). Experimental studies of moving the seeds of confectionery sunflower with vibrating sieves of different types (perforated screens, rod sieves, and precision sieves) have allowed establishing how changes in total concentration, productivity, and consumed power of the calibrating machine depend on the seed input, sieve angle, and frequency of vibrations of the sieve. To make the seed separation process effective, the vibrating sieve is to operate with the maximum productivity equal to the seed input (perforated screens – 1.116 kg/h, rod sieves – 1,518 kg/h, precision sieves – 1,781 kg/h), with the following total seed concentrations: perforated sieves – 14.54%, rod sieves – 12.45%, precision sieves – 10.41%, and power P (perforated sieves – 0.24 kW, rod sieves – 0.30 kW, precision sieves – 0.35 kW) consumed by the calibrating machine must be minimum. Precision sieves (produced by laser cutting) have the best characteristics of their performance (q=1781 kg/h) and quality (θ=10.41%). For this, the frequency of their vibrations should be 5.9 Hz, and their angle should be 5°.

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