The effect of an external magnetic field on the structure of liquid water using molecular dynamics simulation

Abstract

Through a series of molecular dynamics simulations based on the flexible three-centered water model, this study analyzes the structural changes induced in liquid water by the application of a magnetic field with a strength ranging from 1 to 10 T. It is found that the number of hydrogen bonds increases slightly as the strength of the magnetic field is increased. This implies that the size of a water cluster can be controlled by the application of an external magnetic field. The structure of the water is analyzed by calculating the radial distribution function of the water molecules. The results reveal that the structure of the water is more stable and the ability of the water molecules to form hydrogen bonds is enhanced when a magnetic field is applied. In addition, the behavior of the water molecules changes under the influence of a magnetic field; for example, the self-diffusion coefficient of the water molecules decreases.

Frequency Dependence of Conductivity Characteristics of Seawater Ionic Solution under Magnetic Field

“…Fatemeh Moosavi et al [7] examined the effect of magnetic field on the solvent properties and found that the diffusivity decreases lead to interactions increase and the strength of the hydrogen bonds enhanced under magnetic field. This is consistent with results of Chang and Weng, they suggested that the self-diffusion coefficient of the water molecules decreases and the number of hydrogen bonds increases when the magnetic field strength increased [8].…”

Fotosíntesis y rendimiento de biomasa en ají, rábano y maíz sometidos a agua tratada magnéticamente

“…Sin embargo, varias investigaciones han demostrado que sí la tiene, pero no debido a un fenómeno de alineación de electrones, como en sustancias ferromagnéticas (hierro o níquel), ya que el agua tiene una muy baja susceptibilidad magnética. En cambio, es ampliamente aceptado que la tensión superficial, la velocidad de evaporación y el agrupamiento molecular del agua se ven afectados en presencia de campos magnéticos de diferente intensidad (Chang & Weng, 2006;Otsuka & Ozeki, 2006;Pang & Deng, 2008). Se cree que estos procesos están relacionados con los enlaces de hidrógeno (Cai, Yang, He, & Zhu, 2009).…”

An Overview on Magnetic Field and Electric Field Interactions with Ice Crystallisation; Application in the Case of Frozen Food

“…The average number of hydrogen bond is a good indicator to show the changes in water structure induced by a MF [28]. On the contrary, Chang & Weng [26] through a series of MD simulations showed that the number of hydrogen bonds increased slightly (≈by 0.34%) when the MF strength was increased from 1 to 10 T. The increase in the number of hydrogen bonds implies that the size of water cluster would be bigger under a MF, and hence the structure of the water molecules would be more compact. Moreover, they reported that the self-diffusion coefficient of water decreased as the strength of MF was increased.…”

“…Former studies revealed that specific properties of water such as surface tension force and viscosity, optical property (changes in optical feature of water including infrared, Raman, visible, ultraviolet lights and X-ray spectra), electromagnetic property (refractive index, dielectric constant and electrical conductivity), thermodynamic property (enthalpy of vaporization), dynamic property (self-diffusion coefficient) and molecular structure of water (hydrogen bond structure) change upon the application of MFs [16,17,[22][23][24][25][26][27][28][29][30].…”

“…For instance, vaporization enthalpy of non-magnetized water was 50.86 ± 0.46 kJ mol −1 and its value increased to 68.86 ± 0.49 kJ mol −1 on exposure to MF with strength 45-65 mT for 3 h [23]. Simulation techniques, such as Monte Carlo (MC) and Molecular Dynamics (MD) simulation techniques have been used to examine the changes induced at a molecular level in liquid water by the application of MFs [23,26,27]. The observations by these groups were dissimilar.…”