Paper-PDMS hybrid microchannel: a platform for rapid fluid-transport and mixing

2016 ◽  
Vol 26 (10) ◽  
pp. 105008 ◽  
Author(s):  
Ravi Kumar Arun ◽  
Nivedita Priyadarshini ◽  
Kaustav Chaudhury ◽  
Nripen Chanda ◽  
Gautam Biswas ◽  
...  
Keyword(s):  
Fluid Transport ◽  
Transport And Mixing

scholarly journals Mixing and transport by ciliary carpets: a numerical study

2014 ◽  
Vol 743 ◽  
pp. 124-140 ◽  
Author(s):  
Yang Ding ◽  
Janna C. Nawroth ◽  
Margaret J. McFall-Ngai ◽  
Eva Kanso
Keyword(s):  
Fluid Transport ◽  
Numerical Study ◽  
Mixing Time ◽  
Three Dimensional ◽  
Chemical Diffusion ◽  
Metachronal Wave ◽  
Mixing Rates ◽  
Infinite Array ◽  
Transport Region ◽  
Transport And Mixing

AbstractWe use a three-dimensional computational model to study the fluid transport and mixing due to the beating of an infinite array of cilia. In accord with recent experiments, we observe two distinct regions: a fluid transport region above the cilia and a fluid mixing region below the cilia tip. The metachronal wave due to phase differences between neighbouring cilia is known to enhance the fluid transport above the ciliary tip. In this work, we show that the metachronal wave also enhances the mixing rates in the sub-ciliary region, often simultaneously with the flow rate enhancement. Our results suggest that this simultaneous enhancement in transport and mixing is due to an enhancement in shear flow. As the flow above the cilia increases, the shear rate in the fluid increases and this shear enhances stretching, which is an essential ingredient for mixing. Estimates of the mixing time scale indicate that, compared to diffusion, the mixing due to the cilia beat may be significant and sometimes dominates chemical diffusion.

scholarly journals Research on a Piezoelectric Pump with Flexible Valves

2021 ◽  
Vol 11 (7) ◽  
pp. 2909
Author(s):  
Weiqing Huang ◽  
Liyi Lai ◽  
Zhenlin Chen ◽  
Xiaosheng Chen ◽  
Zhi Huang ◽  
...  
Keyword(s):  
Flow Rate ◽  
Fluid Transport ◽  
Smooth Transition ◽  
Driving Voltage ◽  
Piezoelectric Pump ◽  
Venous Valve ◽  
Output Pressure ◽  
Small Flow ◽  
Working Principle ◽  
Opening And Closing

Imitating the structure of the venous valve and its characteristics of passive opening and closing with changes in heart pressure, a piezoelectric pump with flexible valves (PPFV) was designed. Firstly, the structure and the working principle of the PPFV were introduced. Then, the flexible valve, the main functional component of the pump, was analyzed theoretically. Finally, an experimental prototype was manufactured and its performance was tested. The research proves that the PPFV can achieve a smooth transition between valved and valveless by only changing the driving signal of the piezoelectric (PZT) vibrator. The results demonstrate that when the driving voltage is 100 V and the frequency is 25 Hz, the experimental flow rate of the PPFV is about 119.61 mL/min, and the output pressure is about 6.16 kPa. This kind of pump can realize the reciprocal conversion of a large flow rate, high output pressure, and a small flow rate, low output pressure under the electronic control signal. Therefore, it can be utilized for fluid transport and pressure transmission at both the macro-level and the micro-level, which belongs to the macro–micro combined component.

scholarly journals Noble gases in sediment pore water yield insights into hydrothermal fluid transport in the northern Guaymas Basin

2021 ◽  
Vol 434 ◽  
pp. 106419
Author(s):  
E. Horstmann ◽  
Y. Tomonaga ◽  
M.S. Brennwald ◽  
M. Schmidt ◽  
V. Liebetrau ◽  
...  
Keyword(s):  
Pore Water ◽  
Hydrothermal Fluid ◽  
Fluid Transport ◽  
Noble Gases ◽  
Water Yield ◽  
Sediment Pore Water ◽  
Guaymas Basin

Fluid transport in thin film polymer processors

1979 ◽  
Vol 19 (9) ◽  
pp. 651-659 ◽  
Author(s):  
James M. McKelvey ◽  
G. Vincent Sharps
Keyword(s):  
Thin Film ◽  
Fluid Transport ◽  
Film Polymer
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