A new method for three-dimensional numerical simulation of electromagnetic and fluid-flow phenomena in electromagnetic separation of inclusions from liquid metal

Slow shot velocity and its acceleration phase in the shot sleeve have great influence on the flow pattern of the liquid metal in the shot sleeve. In this paper, a three-dimensional model based on the SOLA-VOF algorithm was developed and used to simulate the flow of melt in the shot sleeve. The mathematical model was verified by water analog experiments with constant plunger velocities. Based on numerical simulation results, the influences of the plunger acceleration on the wave profile of the liquid metal in the shot sleeve under different fill ratios and sleeve diameters were investigated. The results indicated that in order to avoid air entrapment in the shot sleeve, the optimal acceleration value to the critical slow shot velocity increases with the increase of the fill ratio, and the range of suitable acceleration becomes wider as well. With the same fill ratio, the value of suitable acceleration rises as the plunger diameter increases.

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Computer Modeling of Electromagnetic Fields and Fluid Flows for Edge Containment in Continuous Casting

Journal of Manufacturing Science and Engineering ◽

10.1115/1.2039101 ◽

2004 ◽

Vol 127 (4) ◽

pp. 724-730 ◽

Cited By ~ 3

Author(s):

Fon-Chieh Chang ◽

John R. Hull

Keyword(s):

Numerical Simulation ◽

Fluid Flow ◽

Liquid Metal ◽

Eddy Currents ◽

Stokes Equations ◽

Fluid Flows ◽

Experimental Results ◽

Twin Roll Casting ◽

Roll Casting ◽

Twin Roll

A computer model was developed to predict eddy currents and fluid flows in molten steel. The model was verified by comparing predictions with experimental results of liquid-metal containment and fluid flow in electromagnetic (EM) edge dams (EMDs) designed at Inland Steel (Ispat Industries Ltd.) for twin-roll casting. This mathematical model can greatly shorten casting research on the use of EM fields for liquid metal containment and control. It can also optimize the existing casting processes and minimize expensive, time-consuming full-scale testing. The model was verified by comparing predictions with experimental results of liquid metal containment and fluid flow in EM edge dams designed at Inland Steel (Ispat Industries Ltd.) for twin-roll casting. Numerical simulation was performed by coupling a three-dimensional (3D) finite-element EM code (ELEKTRA) and a 3D finite-difference fluids code (CaPS-EM) to solve Maxwell’s equations, Ohm’s law, Navier-Stokes equations, and transport equations of turbulence flow in a casting process that uses EM fields. ELEKTRA is able to predict the eddy-current distribution and EM forces in complex geometry. CaPS-EM is capable of modeling fluid flows with free surfaces and dynamic rollers. The computed 3D magnetic fields and induced eddy currents in ELEKTRA are used as input to flow-field computations in CaPS-EM. Results of the numerical simulation compared well with measurements obtained from both static and dynamic tests.

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The Research on Numerical Simulation of the Centrifugal Pump and Configuration Perfected

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.694-697.56 ◽

2013 ◽

Vol 694-697 ◽

pp. 56-60

Author(s):

Yue Jun Ma ◽

Ji Tao Zhao ◽

Yu Min Yang

Keyword(s):

Numerical Simulation ◽

Centrifugal Pump ◽

Unstructured Grid ◽

Stokes Equations ◽

Three Dimensional ◽

Internal Flow ◽

Navier Stokes ◽

Navier Stokes Equations ◽

Flow Phenomena ◽

Simplec Algorithm

In the paper, on the basis of three-dimensional Reynolds-averaged Navier-Stokes equations and the RNG κ-ε turbulence model, adopting Three-dimensional unstructured grid and pressure connection the implicit correction SIMPLEC algorithm, and using MRF model which is supported by Fluent, this paper carries out numerical simulation of the internal flow of the centrifugal pump in different operation points. According to the results of numerical simulation, this paper analyzes the bad flow phenomena of the centrifugal pump, and puts forward suggests about configuration perfected of the centrifugal pump. In addition, this paper is also predicted the experimental value of the centrifugal pump performance, which is corresponding well with the measured value.

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A new method to observe three-dimensional fractures in concrete using liquid metal porosimetry technique

Cement and Concrete Research ◽

10.1016/s0008-8846(97)00134-8 ◽

1997 ◽

Vol 27 (9) ◽

pp. 1333-1341 ◽

Cited By ~ 9

Author(s):

Kamran M. Nemati ◽

Paulo J.M. Monteiro

Keyword(s):

Liquid Metal ◽

Three Dimensional ◽

New Method

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Study of Three-Dimensional Viscous Flows in an Axial Compressor Cascade Including Tip Leakage Effects Using a SIMPLE-Based Algorithm

Journal of Turbomachinery ◽

10.1115/1.3262024 ◽

1986 ◽

Vol 108 (1) ◽

pp. 51-58 ◽

Cited By ~ 11

Author(s):

M. Pouagare ◽

R. A. Delaney

Keyword(s):

Numerical Simulation ◽

Three Dimensional ◽

Axial Compressor ◽

Simple Algorithm ◽

Suction Side ◽

Tip Clearance ◽

High Loading ◽

Leakage Flow ◽

Compressor Cascade ◽

Flow Phenomena

A multisweep space-marching solver based on a modified version of the SIMPLE algorithm was employed to study the three-dimensional flow field through a linear cascade. Three cases were tested: one with moderate loading, one with high loading, and one with high loading and tip clearance. The results of the numerical simulation were compared with available experimental measurements, and the agreement between the two was found satisfactory. The numerical simulation provided insight into several important endwall flow phenomena such as the interaction between the leakage and passage vortices, the interaction between the leakage vortex and the wake, the effect of leakage flow and loading on losses and secondary kinetic energy, the suction side corner separation, and the blowing of this separation by the leakage flow.

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Numerical Simulation of Fluid Flow inside the Flow Control Valve

Quality Production Improvement - QPI ◽

10.2478/cqpi-2019-0053 ◽

2019 ◽

Vol 1 (1) ◽

pp. 394-399 ◽

Cited By ~ 1

Author(s):

Mariusz Domagała ◽

Hassan Momeni ◽

Joanna Fabis-Domagała ◽

Mariusz Krawczyk ◽

Grzegorz Filo ◽

...

Keyword(s):

Numerical Simulation ◽

Fluid Flow ◽

Flow Control ◽

Numerical Simulations ◽

Control Valve ◽

Flow Control Valve ◽

Flow Phenomena ◽

Hydraulic Valves

Abstract Hydraulic valves are widely used in many branches and they are still developed and improved. Due to the problem with verification of flow phenomena which appears during valves operation numerical simulations methods are tools which allows to improved valves design. This paper presents numerical simulation of fluid flow inside flow control valve.

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Numerical simulation of three-dimensional passive micromixer based on the principle of Koch fractal

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2021-0020 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Siyue Xiong ◽

Xueye Chen

Keyword(s):

Numerical Simulation ◽

Fluid Flow ◽

Cross Section ◽

Three Dimensional ◽

Mixing Efficiency ◽

Mixing Performance ◽

Chaotic Convection ◽

Passive Micromixer ◽

Koch Fractal ◽

Koch Fractal Principle

Abstract In this paper, We arrange the obstacles based on the Koch fractal principle (OKF) in the micromixer. By changing the fluid flow and folding the fluid, a better mixing performance is achieved. We improve the mixing efficiency by placing OKF and changing the position of OKF, then we studied the influence of the number of OKF and the height of the micromixer on the mixing performance. The results show that when eight OKF are staggered in the microchannel and the height is 0.2 mm, the mixing efficiency of the OKF micromixer can reach 97.1%. Finally, we compared the velocity cross section and velocity streamline of the fluid, and analyzed the influence of OKF on the concentration trend. Through analysis, it is concluded that OKF can generate chaotic convection in the fluid, and enhance the mixing of fluids by generating vortices and folding the fluid. It can effectively improve the mixing efficiency of the micromixer.

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