According to Mehr news agency, citing University of Tehran, researchers from Technical Colleges of Tehran University, consisting of Farhang Jalali Farahani, Reza Zarghami and Engineer Shagaig Morsali, have succeeded in simulating and investigating the separation process of magnetic particles from a fluid flow using an advanced computational model (D-DEM).
In this study, the results of which are presented in the form of a scientific paper, the effect of key parameters such as magnetic field intensity, fluid flow velocity and particle size on separation efficiency has been carefully analyzed.
In this regard, Farhang Jalali Farahani, a member of the Faculty of Chemical Engineering, University of Tehran, said: The findings of this research show that the magnetic field, especially in the micro and nano dimensions, is a very effective and controllable tool for particle separation.
Referring to the details of the model used, the professor of the Faculty of Chemical Engineering explained: In this simulation, the magnetic field was applied by a linear dipole source next to the flow channel. The results clearly show the accumulation and absorption of particles in the adjacent region of this dipole, especially in its initial part.
He further pointed to the quantitative findings of this research and added: Our studies have revealed a direct and very significant relationship between the strength of the magnetic field and the separation efficiency. For example, at a constant velocity of 0.2 m/s, increasing the field intensity from 0.6 to 3 tesla increased the particle separation (absorption) efficiency from 69% to about 91%.
This university professor said about the opposite effect of fluid speed: On the contrary, increasing the fluid speed has a negative effect on efficiency. So that in the fixed field of 1 Tesla, by reducing the speed from 0.3 to 0.1 m/s, the separation efficiency was almost doubled.
Jalali Farahani pointed out: Based on these simulations, the combination of optimal conditions, i.e. applying the maximum intensity of the magnetic field along with the minimum speed of the fluid flow, can lead to achieving an efficiency of about 98%, which is a very significant number.
In the end, he addressed the effect of the characteristics of the particles and reminded: the results show that particles with a larger diameter and higher density respond better to the magnetic field and are attracted with greater force. This issue is very important in the design of practical separation systems.
According to him, this computational modeling can be a valuable guide for the design and optimization of magnetic separation systems in various applications from mining and material processing to medical and biotechnology fields.
The findings of this study are available through this link.
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