TY - JOUR
TI - Simulation of the co-axial ferrofluid droplets interaction under uniform magnetic field
AU - Ghaderi Atena
AU - Kayhani Mohammad Hassan
AU - Nazari Mohsen
JN - Thermal Science
PY - 2019
VL - 23
IS - 2
SP - 1027
EP - 1042
PT - Article
AB - In this study, falling and the coalescence of a pair ferrofluid droplets  subjected to uniform magnetic field are investigated numerically. For this  approach, a two dimensional hybrid approach combined of lattice-Boltzmann and  Finite-volume method is used. The lattice Boltzmann equation with the  magnetic force term is solved to update the flow field while the magnetic  induction equation is solved using finite volume method to calculate the  magnetic field. To validate current simulations, three test cases have been  considered: Laplace, multiple rising bubbles and deformation of static drop  under magnetic field are analyzed. The comparison of results between the  present study and previous researches shows a good agreement. The effects of  different parameters: magnetic Bond number, magnetic susceptibility and  magnetic field direction are comprehensively studied. The results show that  the coalescence of droplets becomes fast with the increasing Bond number and  susceptibility in y-direction magnetic field. Also, the coalescence and  falling process of droplets takes more time in the horizontal magnetic field  in comparison with the vertical magnetic field.