hydrophobic microchannel
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2021 ◽  
pp. 113045
Author(s):  
Tao Peng ◽  
Mingyong Zhou ◽  
Shuai Yuan ◽  
Bingyan Jiang




Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 737 ◽  
Author(s):  
Nahla Alamoodi ◽  
Anas Alazzam

A new approach for droplet coalescence in microfluidic channels based on selective surface energy alteration is demonstrated. The proposed method involves patterning the surface of cyclic olefin copolymer (COC), a hydrophobic substrate attached to a polydimethylsiloxane hydrophobic microchannel, with graphene oxide (GO) using standard microfabrication techniques. Surface wettability and adhesion analyses confirmed the enhancement of the COC surface energy upon GO patterning and the stability of the GO film on COC. Three representative cases are illustrated to demonstrate the effectiveness of the method on the coalescence of droplets for different droplet flow regimes, as well as the effect of changing the size of the patterned surface area on the fusion process. The method achieves droplet coalescence without the need for precise synchronization.



2019 ◽  
Vol 28 (2) ◽  
pp. 024702
Author(s):  
Chao Wang ◽  
Chao-qun Shen ◽  
Su-chen Wu ◽  
Xiang-dong Liu ◽  
Fang-ping Tang


2019 ◽  
Vol 12 (1) ◽  
pp. 219-231
Author(s):  
A. Sohankar ◽  
M. Riahi ◽  
E. Shirani ◽  
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◽  
...  


Author(s):  
Ainul Haque ◽  
Ameeya Kumar Nayak

In this paper, a mathematical model has been developed to analyze the combined electroosmotic and pressure driven flow of power law fluids in a micro channel in the presence of Joule heating effects. The effects of Navier slip boundary condition and thermal radiation is examined for effective heat transfer in a hydrophobic microchannel. The analytical treatment has been performed for fluid flow and heat transfer effects in terms of flow governing parameters. This study highlights the effect of channel height to the electric double layer thickness and observed the flow variation due to heat transfer effect with the available scientific data. For a pure EOF, velocity slip have more significant role to get a maximum flow rate as expected. For both pseudo-plastic and dilatent fluids Nusselt number is decreased with the increment of the hydrophobic parameter and dimensionless pressure gradient where as increment in Joule heating effect enhance the heat transfer rate.





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