Experimental study on particles directed transport by an alternating travelling-wave electrostatic field

2022 ◽  
pp. 117107
Author(s):  
Junping Gu ◽  
Guang Zhang ◽  
Qinggong Wang ◽  
Chao Wang ◽  
Yiwei Liu ◽  
...  
2011 ◽  
Vol 365 ◽  
pp. 440-444
Author(s):  
Jue Hang ◽  
Xin Chen ◽  
Jian Ping Xiong

Norder to find the best high-voltage electrostatic radiation seed program, to select two different kinds of cucumbers, vegetables, paddy rice seeds, each seed be divided into 5 experimental groups, and be treated by high voltage electrostatic field (HVEF) at different field strength and time, and testing and statistics of the seeds vigour at germination stage. The results indicated that the greater the radiation field to same seed, the shorter radiation time is required, and vice versa. For each species, E•t tends to a constant (the constant is different in different species). Be proved by mathematical derivation that the HVEF radiation transport essentially energy to the seed, and then will be able to find the best way for HVEF radiation seeds. CLC number: S129 Document code: A.


1985 ◽  
Vol 58 (4) ◽  
pp. 629-638 ◽  
Author(s):  
K. FRICKE ◽  
H. L. HARTNAGEL

2018 ◽  
Vol 39 (8) ◽  
pp. 749-760
Author(s):  
Yelei Yao ◽  
Jianxun Wang ◽  
Guo Liu ◽  
Bao Zhang ◽  
Kaiwen Chen ◽  
...  

2010 ◽  
Vol 649 ◽  
pp. 371-398 ◽  
Author(s):  
S. MALEKMOHAMMADI ◽  
M. CARRASCO-TEJA ◽  
S. STOREY ◽  
I. A. FRIGAARD ◽  
D. M. MARTINEZ

We present an experimental study of slow laminar miscible displacement flows in vertical narrow eccentric annuli. We demonstrate that for suitable choices of viscosity ratio, density ratio and flow rate, we are able to find steady travelling wave displacements along the length of the annulus, even when strongly eccentric. Small eccentricity, increased viscosity ratio, increased density ratio and slower flow rates all appear to favour a steady displacement for Newtonian fluids. Qualitatively similar effects are found for non-Newtonian fluids, although the role of flow rate is less clear. These results are largely in line with predictions of a Hele-Shaw style of displacement model (Bittleston et al., J. Engng Math., vol. 43, 2002, pp. 229–253). The experiments also reveal interesting phenomena caused largely by secondary flows and dispersion. In the steady displacements, eccentricity drives a strong azimuthal counter-current flow above/below the advancing interface. This advects displacing fluid to the wide side of the annulus, where it focuses in the form of an advancing spike. On the narrow side we have also observed a spike, but only in Newtonian fluid displacements. For unsteady displacements, the azimuthal currents diminish as the interface elongates. With a strong enough yield stress and with a large enough eccentricity, unyielded fluid remains behind on the narrow side of the annulus.


Author(s):  
Junping Gu ◽  
Qinggong Wang ◽  
Yuxin Wu ◽  
Lele Feng ◽  
Guang Zhang ◽  
...  

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