Efficient microextraction process exploiting spontaneous interfacial convection driven by Marangoni and electric field induced instability: A computational fluid dynamics study

2020 ◽  
Vol 32 (1) ◽  
pp. 014102 ◽  
Author(s):  
Shirsendu Mitra ◽  
Sunil Kumar Singh ◽  
Ekaterina Shevchenko ◽  
Mohit Sachan ◽  
Abir Ghosh ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Electric Field ◽  
Interfacial Convection

Micro Fluidic Platform for Manipulation of Micro- and Nanoscale Particles

2003 ◽  
Author(s):  
J. Kadaksham ◽  
J. Batton ◽  
P. Singh ◽  
N. Aubry
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Electric Field ◽  
Relative Magnitude ◽  
Living Cells ◽  
Particle Interactions ◽  
Mechanical Device ◽  
Dielectrophoretic Force ◽  
Nanoscale Particles ◽  
Computational Fluid Dynamics Cfd

In this paper, we study the manipulation and immobilization of micro- and nano-sized particles, such as living cells, suspended in a liquid. Our technique focuses on dielectrophoresis, that is, the use of spatially nonuniform electric field, while not damaging the manipulated particles or cells. The small size of the particles considered here requires the use of micro-electro-mechanical device (MEMS). We first simulate the suspended system by means of our new computational fluid dynamics (CFD) tool based on the distributed Lagrange Multiplier method (DLM), which takes into account not only fluid-particle but also particle-particle interactions. Results for both positive and negative dielectrophoresis are presented. We also show the existence of various regimes for the particle structures depending on the relative magnitude of the dielectrophoretic force and the electrostatic particle-particle interactions. We then design, fabricate and test a MEMS platform containing several microdevices.

High Orientation Ordered Nanofibers Fabricated by Electrospinning

2013 ◽  
Vol 843 ◽  
pp. 21-25
Author(s):  
Hai Yan Kong ◽  
Hong Yan Liu ◽  
Ji Huan He
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Electric Field ◽  
High Orientation

Nanofibers with high orientation are of significant applications. This paper demonstrates a method to fabricate high orientation ordered nanofibers by electrospinning. The distribution of the electric field is simulated by using computational fluid dynamics software ANSYS14.0 to illustrate its mechanism.

The Impact of Electrostatic Forces on the Dynamic and Heat Transfer Coefficient of Single Bubble Rising

2016 ◽  
Vol 5 (2) ◽  
pp. 35-46
Author(s):  
Mohammad Ali Salehi ◽  
Samaneh Poursaman
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Experimental Data ◽  
Computational Fluid Dynamics ◽  
Nusselt Number ◽  
Heat Transfer Coefficient ◽  
Electric Field ◽  
Air Bubbles ◽  
Bubble Rising ◽  
The Impact

In this study, the effect of an applied electric field on the separation and rise of bubble was simulated by Computational Fluid dynamics and results were compared with experimental data. The numerical results showed proper agreement (10%) with experimental reports. The working fluids in the experiment were air, water, and oil. During the simulation, the effects of different voltages on the bubble, bubble ascent, Reynolds and Nusselt number were investigated. The results showed that the more polar air bubbles in the fluid changed and diverted its route. Applying an electric field, reduces separation time, resulting in the formation of bubbles and more bubbles generated at the same time that it increases the heat transfer.

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