The electric field in sandstorm can strongly affect the sand׳s scattering properties

Some field experimental results have shown that the moving sands or dust aerosols in nature are usually electrified, and those charged particles also produce a strong electric field in air, which is named as wind-blown sand electric field. Some scholars have pointed out that the net charge on the particle significantly enhances its electromagnetic (EM) extinction properties, but up to now, there is no conclusive research on the effect of the environmental electric field. Based on the extended Mie theory, the effect of the electric field in a sandstorm on the EM attenuation properties of the charged larger dust particle is studied. The numerical results indicate that the environmental electric field also has a great influence on the particle's optical properties, and the stronger the electric field, the bigger the effect. In addition, the charged angle, the charge density, and the particle radius all have a specific impact on the charged particle's optical properties.

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“…Then based on the equation 𝑃 = ε 0 (ε r − 1) 𝐸 in and σ p = r •𝑃 , we can obtain the expression of the polarization charge [26] σ…”

Section: The Basically Physical Models 21 the Polarization Chargementioning

confidence: 99%

Electromagnetic scattering of charged particles in a strong wind-blown sand electric field

Gao

Wang

2019

Chinese Phys. B

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“…It is well known that the negative refractive index materials or metamaterials are hard to be produced, and usually, its sizes are much larger than the targets 55 . Can we find alternatives to negative index materials?Besides, the electric field commonly exists in the nature, and it may change the object's physical characteristic [56][57][58] . Some conditions we need effectively manipulate the electric field, for example, the measurement of electrostatic phenomena in sandstorms and other aerosol weather 59,60 , neuro-medicine 61 , the shielding of an static electromagnetic field for some special devices or sensors 62 , the enhancement of localized electric field 63 , polymer self-assembly properties induced by strong electric field 64 , etc.…”

mentioning

confidence: 99%

Equivalence between positive and negative refractive index materials in electrostatic cloaks

Wang

Zhang

2021

Sci Rep

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We investigate, both theoretically and numerically, the equivalence relationship between the positive and negative refraction index dielectric materials in electrostatic invisibility cloak. We have derived an analytical formula that enables fast calculate the corresponding positive dielectric constant from the negative refraction index material. The numerical results show that the negative refraction index material can be replaced by the positive refractive index materials in the static field cloak. This offers some new viewpoints for designing new sensing systems and devices in physics, colloid science, and engineering applications.

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Equivalent medium theory of layered sphere particle with anisotropic shells

Wang

Zhang

2016

Journal of Quantitative Spectroscopy and Radiative Transfer

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The electric field in sandstorm can strongly affect the sand׳s scattering properties

Cited by 6 publications

References 27 publications

Electromagnetic scattering of charged particles in a strong wind-blown sand electric field

Electromagnetic scattering of charged particles in a strong wind-blown sand electric field

Equivalence between positive and negative refractive index materials in electrostatic cloaks

Equivalent medium theory of layered sphere particle with anisotropic shells

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