scholarly journals Mathematical modelling of the liquid atomization process by cocurrent gas flow

2016 ◽  
Vol 124 ◽  
pp. 012076 ◽  
Author(s):  
V A Arkhipov ◽  
V M Boiko ◽  
V D Goldin ◽  
E A Maslov ◽  
S E Orlov ◽  
...  
Keyword(s):  
Mathematical Modelling ◽  
Gas Flow ◽  
Atomization Process ◽  
Liquid Atomization

Modeling of Flow Fields of Different Delivery Chamfers in Spray Forming Process

2014 ◽  
Vol 789 ◽  
pp. 554-559
Author(s):  
Yang Liu ◽  
Zhou Li ◽  
Guo Qing Zhang ◽  
Wen Yong Xu
Keyword(s):  
Flow Field ◽  
Gas Flow ◽  
Fluid Dynamic ◽  
Metal Flow ◽  
Spray Forming ◽  
Operating Pressure ◽  
Delivery Tube ◽  
Forming Process ◽  
Atomization Process ◽  
Sharp Point

The computational fluid dynamic (CFD) software was used to calculate the velocity field in atomization chamber of spray forming equipment. The relationship between melt flow rates, gas aspiration of the atomizer and operating pressure are complex, and the above mentioned parameters are closely related to the atomization process. The influences of different delivery chamfers on gas flow field, which is determined by atomizer structure, were analyzed. Using K-epsilon model with a symmetrical domain, the gas dynamic of different delivery chamfer conditions were investigated. The results indicate that the sharp point of delivery tube causes detachment of flow field, and 56°, 45° and 34° chamfer conditions have same diffusion angle. Gas was aspirated from delivery tube when chamfer was 0°, which is beneficial to liquid metal flow in atomization process.

Analysis of the Effect of the Atomizer Swirl Chamber on the Liquid Atomization Process

2020 ◽  
pp. 153-160
Author(s):  
Franciszek Klimczak ◽  
Tomasz Burda ◽  
Marek Ochowiak ◽  
Sylwia Włodarczak ◽  
Andżelika Krupińska
Keyword(s):  
Atomization Process ◽  
Swirl Chamber ◽  
Liquid Atomization

The Influence of Atomizing Gas Molecular Weight on Low Mass Flowrate Effervescent Atomizer Performance

1998 ◽  
Vol 120 (4) ◽  
pp. 750-754 ◽  
Author(s):  
M. T. Lund ◽  
C. Q. Jian ◽  
P. E. Sojka ◽  
J. P. Gore ◽  
M. V. Panchagnula
Keyword(s):  
Molecular Weight ◽  
Gas Flow ◽  
Drop Size ◽  
Atomization Process ◽  
Subsequent Increase ◽  
Drop Velocity ◽  
Mass Flowrate ◽  
Effervescent Atomizer ◽  
Low Mass ◽  
The Relationship

The relationship between atomizing gas molecular weight and spray mean drop size, Rosin-Rammler distribution parameter, and number averaged drop velocity is reported for a low mass flowrate effervescent atomizer-produced spray. Experimental data at lower gas-liquid ratios (GLR’s) demonstrate that an increase in the molecular weight of the atomizing gas increases mean drop size and decreases number averaged drop velocity. The increase in mean drop size is attributed to an increase in the thickness of the liquid annulus at the nozzle exit and a subsequent increase in the diameter of ligaments formed there. The decrease in number averaged velocity results from a decrease in jet momentum rate. A model developed to explain the atomization process indicates that the gas flow is choked at higher GLR’s.

Mathematical modelling and experimental investigation of gas flow in minichannels and microchannels

2010 ◽  
Vol 19 (4) ◽  
pp. 289-294 ◽  
Author(s):  
Jan Vimmr ◽  
Hynek Klášterka ◽  
Marek Hajžman ◽  
Martin Luxa ◽  
Rudolf Dvořák
Keyword(s):  
Experimental Investigation ◽  
Mathematical Modelling ◽  
Gas Flow

scholarly journals Physical and Numerical Modelling on the Mixing Condition in a 50 t Ladle

Metals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1136
Author(s):  
Liu ◽  
Bai ◽  
Liu ◽  
Jönsson ◽  
Gan
Keyword(s):  
Mathematical Modelling ◽  
Flow Pattern ◽  
Flow Rate ◽  
Gas Flow ◽  
Transport Model ◽  
Mixing Time ◽  
Bubbly Flow ◽  
Physical Modelling ◽  
Mixing Conditions ◽  
Mixing Condition

The bubbly flow and mixing conditions for gas stirring in a 50t ladle were investigated by using physical modelling and mathematical modelling. In the physical modelling, the effect of the porous plugs’ configurations on the tracer homogenization was studied by using a saturated NaCl solution to predict the mixing time and a color dye to show the mixing pattern. In the mathematical modelling, the Euler–Lagrange model and species transport model were used to predict the flow pattern and tracer homogenization, respectively. The results show that, for a ±5% homogenization degree, the mixing time with dual plugs using a radial angle of 180° is shortest. In addition, the mixing time using a radial angle of 135° decreases the most with an increased flow rate. The flow pattern and mixing conditions predicted by mathematical modelling agree well with the result of the physical modelling. For a ±1% homogenization degree, the influence of the tracer’s natural convection on its homogenization pattern cannot be neglected. This is especially true for a ‘soft bubbling’ case using a low gas flow rate. Overall, it is recommended that large radial angles in the range of 135°~180° are chosen for gas stirring in the present study when using dual porous plugs.

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