Multi-physics simulation of dendritic growth in magnetic field assisted solidification

2019 ◽  
Vol 144 ◽  
pp. 118673 ◽  
Author(s):  
Longchao Cao ◽  
Dehao Liu ◽  
Ping Jiang ◽  
Xinyu Shao ◽  
Qi Zhou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dendritic Growth ◽  
Physics Simulation

Mathematical Modelling and Numerical Simulation of Dendrite Growth Using Phase-Field Method with a Magnetic Field Effect

2013 ◽  
Vol 14 (2) ◽  
pp. 477-568 ◽  
Author(s):  
A. Rasheed ◽  
A. Belmiloudi
Keyword(s):  
Magnetic Field ◽  
Binary Mixture ◽  
Phase Field ◽  
Dendritic Growth ◽  
Magnetic Field Effect ◽  
Solidification Process ◽  
Field Method ◽  
Coupled Systems ◽  
Phase Field Method ◽  
Nickel Copper

AbstractIn this paper, we present a new model developed in order to analyze phenomena which arise in the solidification of binary mixtures using phase-field method, which incorporates the convection effects and the action of magnetic field. The model consists of flow, concentration, phase field and energy systems which are nonlinear evolutive and coupled systems. It represents the non-isothermal anisotropic solidification process of a binary mixture together with the motion in a melt with the applied magnetic field. To illustrate our model, numerical simulations of the influence of magnetic-field on the evolution of dendrites during the solidification of the binary mixture of Nickel-Copper (Ni-Cu) are developed. The results demonstrate that the dendritic growth under the action of magnetic-field can be simulated by using our model.

Effect of a Strong Magnetic Field on Dendritic Growth of Ti-Ni Alloy

2013 ◽  
Vol 747-748 ◽  
pp. 810-817 ◽  
Author(s):  
Hui Chang ◽  
Chun Li Huang ◽  
Bin Tang ◽  
Rui Hu ◽  
Jin Shan Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Field Intensity ◽  
Dendritic Growth ◽  
Magnetic Field Intensity ◽  
Phase Field Model ◽  
Curvature Radius ◽  
Ni Alloy ◽  
Equilibrium Solidification ◽  
Microstructure Morphology

A phase field model has been developed to simulate the dendritic growth of Ti-Ni alloy subjected to a strong magnetic field. The influence of a strong magnetic field on the microstructure morphology and its evolution was successfully investigated by the model. The effect of the magnetic field intensity on the dendritic evolution has been further discussed. The simulating results revealed that with greater magnetic field intensity, the primary dendritic arms and the side branches were easier to coarsen. Besides, the dendritic tip growth rate increased with increasing magnetic field intensity, while the curvature radius had an opposite tendency. The microstructure evolution under a strong magnetic field was also studied combined with solidification thermodynamics theory. The results indicate that, the temperature of equilibrium solidification of Ti-Ni alloy changes with the presence of a strong magnetic field, and the morphology of dendritic grains will be affected eventually.

scholarly journals Three-Dimensional Numerical Visualization And Simulation of Multiphysics in Point Source Dc Magnetometric Resistivity Method

2020 ◽  
Author(s):  
Wenlong Gao ◽  
Lei Zhou ◽  
Liangjun Yan
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Point Source ◽  
Three Dimensional ◽  
Theoretical Method ◽  
Potential Method ◽  
Resistivity Method ◽  
Physics Simulation ◽  
Visualization And Simulation ◽  
Numerical Calculation Method

Magnetometric Resistivity(MMR) Method, which can use the power supply method of the traditional apparent resistivity method to measure the magnetic field. At present, the application research abroad is relatively extensive, but the domestic(China) research on the application of the MMR method is very few, and it is not even well-known. This paper is based on the MMR theoretical method under the point source DC condition, combined with the abnormal potential method and the modified Biot-Savart law, and using the three-dimensional numerical calculation method of the finite difference method to calculate the abnormal potential field, electric field, and magnetic field on the matlab2018a platform. Calculate, realize the multi-physics simulation in the electromagnetic field through Matlab platform programming, and verify the correctness of the algorithm by the spherical anomaly model with an analytical solution. Through the visual simulation of the three-dimensional data volume of the multi-physics field in the electromagnetic field, we can better understand the response mechanism of the electromagnetic field under DC conditions and grasp their three-dimensional spatial distribution rules. It is hoped that the research in this article can help the research of MMR Personnel better use this method for exploration.

Observation of magnetic-field penetration via dendritic growth in superconducting niobium films

1995 ◽  
Vol 52 (1) ◽  
pp. 75-78 ◽  
Author(s):  
C. A. Durán ◽  
P. L. Gammel ◽  
R. E. Miller ◽  
D. J. Bishop
Keyword(s):  
Magnetic Field ◽  
Dendritic Growth ◽  
Magnetic Field Penetration ◽  
Field Penetration

Magnetic-field strengths from optical polarization data

1967 ◽  
Vol 31 ◽  
pp. 381-383
Author(s):  
J. M. Greenberg
Keyword(s):  
Magnetic Field ◽  
Optical Polarization ◽  
Polarization Data ◽  
Term Model ◽  
Source Of Information ◽  
Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

Observing the galactic magnetic field

1967 ◽  
Vol 31 ◽  
pp. 375-380
Author(s):  
H. C. van de Hulst
Keyword(s):  
Magnetic Field ◽  
Fair Agreement ◽  
Solar Neighbourhood ◽  
Galactic Magnetic Field ◽  
The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

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