scholarly journals APPLICATION OF THE VOLUME OF FLUID METHOD TO SIMULATE THE PROCESS OF MELTING AND MOVEMENT OF FUEL

2022 ◽  
pp. 3-8
Author(s):  
Y. A. Kabdylkakov ◽  
A. S. Suraev
Keyword(s):  
Melting Process ◽  
Volume Of Fluid ◽  
Experimental Device ◽  
Computational Domain ◽  
Two Dimensional ◽  
Volume Of Fluid Method ◽  
Thermal Problem ◽  
Ansys Fluent ◽  
Simulation Results ◽  
Multiphase Fluid

The article considers the possibility of using the method of multiphase fluid Volume of Fluid (VOF), the Ansys Fluent program, for numerical simulation of the melting process of the materials of the experimental device and their movement over the volume of the computational domain. For modeling the design of a typical experimental device tested in the reactor was selected, a two-dimensional computational model was developed, methods for solving the thermal problem were described, and the simulation results were presented.

Droplet Generation and Piezoceramic Actuation of a Jetting Inker

2011 ◽  
Vol 480-481 ◽  
pp. 574-579
Author(s):  
Lue Zhang ◽  
Hong Hu ◽  
Yong Cao
Keyword(s):  
Numerical Simulation ◽  
Volume Of Fluid ◽  
Numerical Results ◽  
Droplet Generation ◽  
Phase Flow ◽  
Volume Of Fluid Method ◽  
Key Factors ◽  
Simulation Results

To reveal the jetting of fine drops, model of 2-phase flow between gas and liquid is offered based on volume of fluid method. Numerical simulation is launched for the droplet generation through narrow nozzle, and key factors are discussed. Aiming at the ink marking of defective dies in IC production, a jetting inker driven by piezoceramic stacks is developed. The actuation properties are derived; waveform of induced pressure at nozzle entrance is estimated, which coincides the numerical results. Performance of ink dot jetting is evaluated and simulation results are verified.

Calculation of Effect of Viscous and Pressure Forces on Trimming Moments

2014 ◽  
Vol 590 ◽  
pp. 42-47
Author(s):  
Salma Sherbaz ◽  
Wen Yang Duan
Keyword(s):  
Computational Methods ◽  
Reasonable Agreement ◽  
Volume Of Fluid ◽  
Wave Profile ◽  
Computational Domain ◽  
Implicit Methods ◽  
Ansys Fluent ◽  
Hull Form ◽  
Experimental Values

In this study the effects of viscous and pressure forces on trimming moments of Series 60 (CB = 0.6) hull form are calculated at different Froude numbers by employing computational methods. The grid generator GAMBIT was used for meshing hull and computational domain. The Simulations are carried out using commercial CFD code ANSYS Fluent 13. The SIMPLE (Semi-Implicit Methods for Pressure-Linked Equations) algorithm is used for pressure-velocity coupling. The volume of Fluid (VOF) formulation is employed. The computed resistance, wave profile and trim of series 60 hull are compared with experimental values and found in reasonable agreement.

A volume of fluid method for a two-dimensional plasma expansion problem

2007 ◽  
Vol 225 (2) ◽  
pp. 1937-1960 ◽  
Author(s):  
K.-C. Le Thanh ◽  
C. Parzani ◽  
M.-H. Vignal
Keyword(s):  
Volume Of Fluid ◽  
Two Dimensional ◽  
Volume Of Fluid Method ◽  
Plasma Expansion

Particle Transport and Deposition in a Ventilated Room With a Standing Mannequin

2020 ◽  
Author(s):  
Mehrdad Azhdari ◽  
Mohammad Mehdi Tavakol ◽  
Goodarz Ahmadi
Keyword(s):  
Recirculation Zone ◽  
Spherical Particles ◽  
Computational Domain ◽  
Breathing Zone ◽  
Ansys Fluent ◽  
Second Mode ◽  
Airflow Field ◽  
The Mean ◽  
Simulation Results ◽  
Aspiration Efficiency

Abstract This study presents the results of a series of numerical simulations for airflow field and particle dispersion and deposition around a mannequin standing inside a ventilated room. A 3-D airway model was constructed from the nostril inlet to the end of 4th lung generation and was integrated into the standing mannequin model in the room. The computational domain included the region around the mannequin and inside the respiratory system. The room was ventilated by a mixing air-conditioning system that supplied air with a speed of 3m/s from a diffuser mounted on the top of the sidewall and exited from a damper mounted at the bottom of the side or front walls. In the first mode, the diffuser and damper were located on the wall in front of the mannequin and in the second mode on the wall at the right side of the mannequin. The mean airflow field inside the room was obtained by solving the Navier-Stokes and continuity equations using the Ansys-Fluent software. The k-ω SST transitional model was employed for turbulence modeling. Then, spherical particles with 5, 10, 20, and 40 μm diameter and unit density were released into the room, and their trajectories were tracked by using the Lagrangian trajectory analysis approach. Aspiration efficiency and deposition of particles for inhalation flow rates of 15 and 30 lit/min were analyzed with the improved discrete random walk (DRW) stochastic model using a user-defined function (UDF) coupled into the Ansys-Fluent discrete phase model. Simulation results for the mean airflow showed the formation of a large recirculation zone inside the room. In the first mode, the main recirculation zone formed behind mannequin that carried the flow streamlines toward the mannequin breathing zone. In the second mode, the recirculation formed in front of the mannequin face that led the streamlines out of the breathing zone. The simulation results for particle inhalation showed that the aspiration efficiency of particles is higher in the first ventilation mode compared to the second mode. Results also showed that the total deposition of particles in the airway passage increases as particle size increases.

scholarly journals Numerical Technique for Sloshing Velocity in a Partially Filled Moving Tank

2020 ◽  
Vol 8 (6) ◽  
pp. 3046-3049
Keyword(s):  
Numerical Simulation ◽  
Laminar Flow ◽  
Numerical Simulations ◽  
Numerical Technique ◽  
Volume Of Fluid ◽  
Dimensional Case ◽  
Two Dimensional ◽  
Volume Of Fluid Method ◽  
Ansys Software ◽  
Time Period

Numerical simulations have been carried out on a partially filled rectangular tank using volume of fluid method. The tank has been given to and fro motion. Numerical simulation has been carried for a two dimensional case having laminar flow. The effect of sloshing on velocity at different times has been observed using ANSYS software. The study was conducted for two sec. Variations in the velocity has been observed with the time period.

scholarly journals An Atomization Model of Air Spraying Using the Volume-of-Fluid Method and Large Eddy Simulation

Coatings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1400
Author(s):  
Yan Chen ◽  
Shiming Chen ◽  
Wenzhuo Chen ◽  
Jun Hu ◽  
Junze Jiang
Keyword(s):  
Large Eddy Simulation ◽  
Volume Fraction ◽  
Volume Of Fluid ◽  
Staggered Grid ◽  
Velocity Variation ◽  
Computational Domain ◽  
Volume Of Fluid Method ◽  
Atomization Process ◽  
Eddy Simulation ◽  
Large Eddy

When painting complex surfaces, such as large-curvature surfaces, poor coating quality is often obtained, which may be caused by lack of an appropriate atomization model, insufficient understanding of atomization mechanisms and laws, and improper painting parameters. This paper presents a numerical model of paint atomization of air spraying using the volume-of-fluid method and large eddy simulation. The interface capture and the turbulent flow were mainly considered in the model: the former was tracked by the volume-of-fluid method and the latter was predicted by the large eddy simulation. After the computational domain being meshed by the staggered-grid method, the governing equations were discretized by the finite volume method and were solved by the SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) Consistent algorithm. The results of numerical simulations show that the characteristics of atomization flow field, such as velocity variation, pressure distribution, and paint volume fraction are in agreement with the regularities of atomization. Moreover, the primary and secondary atomization phenomena can be clearly observed: as soon as the paint issues from the nozzle, the paint flow begins to distort and the paint fragments continuously eject from the main paint flow and then these paint fragments distort and disintegrate into smaller elements. A comparison with the experimental data from the literature proves that the model of the whole atomization process of air spray is effective. The model is suitable for simulating the whole atomization process and easy to obtain initial conditions, which can be applied to set the appropriate painting parameters and study paint atomization mechanisms and laws in depth.

On the Validity of Two-Dimensional Heat Transfer Simulation of Moving Droplets Between Parallel Plates

2011 ◽  
Author(s):  
V. Talimi ◽  
Y. S. Muzychka ◽  
S. Kocabiyik
Keyword(s):  
Heat Transfer ◽  
Three Dimensional ◽  
Computational Domain ◽  
Two Dimensional ◽  
Parallel Plates ◽  
Ansys Fluent ◽  
The Real ◽  
Dimensional Shape ◽  
Heat Transfer Simulation ◽  
Three Dimensional Shape

Use of moving droplets between two parallel plates has been investigated widely in recent years for cooling purposes. While the real shape of the droplets is a cylinder with curved side (convex or concave) i.e. a three dimensional shape, most of the researchers assumed a two-dimensional computational domain including vertical mid plane of the droplet, which is applicable for not realistic long droplets. In this paper, the differences between these two approaches are investigated numerically, using ANSYS Fluent package.

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