First-principles calculation of contact electrification and validation by experiment

Shen, Xiaozhou; Wang, Andrew E.; Sankaran, R. Mohan; Lacks, Daniel J.

doi:10.1016/j.elstat.2016.04.006

Cited by 54 publications

(34 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fitting parameters were varied 185 until the model showed a reasonable fit to the experimental results for = 1.4 µC m -2 and = 11000 µm 2 . We note that surface charge densities characterized by = 1.4 µC m -2 are reasonable, as they are similar to results found experimentally in glass particle systems (Waitukaitis et al, 2014), and they are significantly smaller than surface charge densities measured for triboelectrically charged quartz (Miura and Arakawa, 2007;Shen et al, 2016). Results…”

Section: Laboratory Studiessupporting

confidence: 87%

Electrostatic forces alter particle size distributions in atmospheric dust

Toth¹,

Rajupet²,

Squire³

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

<p><strong>Abstract.</strong> Large amounts of dust are lofted into the atmosphere from arid regions of the world before being transported up to thousands of kilometers. This atmospheric dust interacts with solar radiation causing changes in the climate, with larger-sized particles having a heating effect, and smaller-sized particles having a cooling effect. Previous studies on the long-range transport of dust have found larger particles than expected, without a model to explain their transport. Here, we investigate the effect of electric fields on lofted airborne dust by blowing sand through a vertically-oriented electric field, and characterizing the size distribution as a function of height. We also model this system, considering the gravitational, drag, and electrostatic forces on particles, to understand the effects of the electric field. Our results indicate that electric fields keep particles suspended at higher elevations and enrich the concentration of larger particles at higher elevations. We extend our model from the small-scale system to long-range atmospheric dust transport to develop insights on the effects of electric fields on size distributions of lofted dust in the atmosphere. We show that the presence of electric fields and the resulting electrostatic force on particles can help explain the transport of unexpectedly larger particles and cause the size distribution to become more uniform as a function of elevation. Thus, our experimental and modelling results indicate that electrostatic forces should be considered when determining the effect of atmospheric dust on the climate.</p>

show abstract

Section: Laboratory Studiessupporting

confidence: 87%

Electrostatic forces alter particle size distributions in atmospheric dust

Toth¹,

Rajupet²,

Squire³

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The maximum electrostatic charge on the surface of a material prior to gas breakdown was found by Matsuyama (2018) to be approximately 400 µC m −2 for a 10 µm particle. The magnitude of the electric field is also difficult to determine and can range over multiple orders of magnitude, with values of up to 200 V m −1 in fair weather electric fields (Adlerman and Williams, 1996;Bennett and Harrison, 2007;Harrison, 2011), up to 15 to 150 kV m −1 in dust storms (Bo and Zheng, 2013;Harrison et al, 2016;Jackson and Farrell, 2006;Schmidt et al, 1998;Zhang et al, 2018), and up to 500 kV m −1 during thunderstorms (Stolzenburg et al, 2007). Since both the charge density and the electric field can vary by orders of magnitude, we consider the product between the two, σ E, to be the important parameter for determining the effects of the electrostatic forces.…”

Section: Modeling Field Studiesmentioning

confidence: 99%

Electrostatic forces alter particle size distributions in atmospheric dust

et al. 2020

Self Cite

View full text Add to dashboard Cite

Abstract. Large amounts of dust are lofted into the atmosphere from arid regions of the world before being transported up to thousands of kilometers. This atmospheric dust interacts with solar radiation and causes changes in the climate, with larger-sized particles having a heating effect, and smaller-sized particles having a cooling effect. Previous studies on the long-range transport of dust have found larger particles than expected, without a model to explain their transport. Here, we investigate the effect of electric fields on lofted airborne dust by blowing sand through a vertically oriented electric field, and characterizing the size distribution as a function of height. We also model this system, considering the gravitational, drag, and electrostatic forces on particles, to understand the effects of the electric field. Our results indicate that electric fields keep particles suspended at higher elevations and enrich the concentration of larger particles at higher elevations. We extend our model from the small-scale system to long-range atmospheric dust transport to develop insights into the effects of electric fields on size distributions of lofted dust in the atmosphere. We show that the presence of electric fields and the resulting electrostatic force on charged particles can help explain the transport of unexpectedly large particles and cause the size distribution to become more uniform as a function of elevation. Thus, our experimental and modeling results indicate that electrostatic forces may in some cases be relevant regarding the effect of atmospheric dust on the climate.

show abstract

“…No matter which model is applied, a constant surface charge density is always assumed to quantitatively represent the transferred charges remaining on the surfaces of the tribo-materials, even after contact electrification. The surface charge density can be theoretically calculated using first-principle approaches [ 18 , 19 ]. However, from the contact electrification-based simulation, it is impossible to predict the charge transfer in the external circuit.…”

Section: Introductionmentioning

confidence: 99%

Universal Triboelectric Nanogenerator Simulation Based on Dynamic Finite Element Method Model

Chen

Wang

Xuan

et al. 2020

Sensors

View full text Add to dashboard Cite

The lack of a universal simulation method for triboelectric nanogenerator (TENG) makes the device design and optimization difficult before experiment, which protracts the research and development process and hinders the landing of practical TENG applications. The existing electrostatic induction models for TENGs have limitations in simulating TENGs with complex geometries and their dynamic behaviors under practical movements due to the topology change issues. Here, a dynamic finite element method (FEM) model is proposed. The introduction of air buffer layers and the moving mesh method eliminates the topology change issues during practical movement and allows simulation of dynamic and time-varying behaviors of TENGs with complex 2D/3D geometries. Systematic investigations are carried out to optimize the air buffer thickness and mesh densities, and the optimized results show excellent consistency with the experimental data and results based on other existing methods. It also shows that a 3D disk-type rotating TENG can be simulated using the model, clearly demonstrating the capability and superiority of the dynamic FEM model. Moreover, the dynamic FEM model is used to optimize the shape of the tribo-material, which is used as a preliminary example to demonstrate the possibility of designing a TENG-based sensor.

show abstract

First-principles calculation of contact electrification and validation by experiment

Cited by 54 publications

References 16 publications

Electrostatic forces alter particle size distributions in atmospheric dust

Electrostatic forces alter particle size distributions in atmospheric dust

Electrostatic forces alter particle size distributions in atmospheric dust

Universal Triboelectric Nanogenerator Simulation Based on Dynamic Finite Element Method Model

Contact Info

Product

Resources

About