scholarly journals Nano-particle deposition in laminar annular pipe flows

2020 ◽  
Vol 31 (8) ◽  
pp. 3134-3143
Author(s):  
Pouyan Talebizadehsardari ◽  
Hassan Rahimzadeh ◽  
Goodarz Ahmadi ◽  
Kiao Inthavong ◽  
Mohammad Mehdi Keshtkar ◽  
...  
Keyword(s):  
Particle Deposition ◽  
Nano Particle ◽  
Pipe Flows ◽  
Annular Pipe

Numerical Study of Convective Heat Transfer From Expanding Annular Pipe Flows

2016 ◽  
Author(s):  
Khaled J. Hammad
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Prandtl Number ◽  
Convective Heat Transfer ◽  
Diameter Ratio ◽  
Wall Heat Transfer ◽  
Reattachment Point ◽  
Transfer Rates ◽  
Pipe Flows ◽  
Annular Pipe

Convective heat transfer from suddenly expanding annular pipe flows are numerically investigated within the steady laminar flow regime. A parametric study is performed to reveal the influence of the annular diameter ratio, k, the Prandtl number, Pr, and the Reynolds number, Re, over the following range of parameters: k = {0, 0.5, 0.7}, Pr = {0.7, 1, 7, 100}, and Re = {25, 50, 100}. Heat transfer enhancement downstream of the expansion plane is only observed for Pr > 1. Peak wall-heat-transfer-rates always appear downstream of the flow reattachment point, in the case of suddenly expanding round pipe flows, i.e. k = 0. However, for suddenly expanding annular pipe flows, i.e., k = 0.5 and 0.7, peak wall-heat-transfer-rates always appear upstream of the flow reattachment point. The observed heat transfer augmentation is more dramatic for suddenly expanding annular flows, in comparison with the one observed for suddenly expanding pipe flows. For a given annular diameter ratio and Reynolds number, increasing the Prandtl number, always results in higher wall-heat-transfer-rates downstream the expansion plane.

Fabrication of Dye-Sensitized Solar Cell (DSSC) Using Different Particle Sizes of TiO2 Deposited via Nano-Particle Deposition System (NPDS)

2012 ◽  
Vol 12 (4) ◽  
pp. 3478-3482 ◽  
Author(s):  
Yang-Hee Kim ◽  
Kwang-Su Kim ◽  
Jin-Woong Lee ◽  
Min-Saeng Kim ◽  
Jung-Oh Choi ◽  
...  
Keyword(s):  
Solar Cell ◽  
Particle Deposition ◽  
Dye Sensitized Solar Cell ◽  
Particle Sizes ◽  
Nano Particle ◽  
Dye Sensitized

Laser-assisted nano particle deposition system and its application for dye sensitized solar cell fabrication

CIRP Annals ◽  
2012 ◽  
Vol 61 (1) ◽  
pp. 575-578 ◽  
Author(s):  
Sung-Hoon Ahn ◽  
Jung-Oh Choi ◽  
Chung-Soo Kim ◽  
Gil-Yong Lee ◽  
Hyun-Taek Lee ◽  
...  
Keyword(s):  
Solar Cell ◽  
Particle Deposition ◽  
Dye Sensitized Solar Cell ◽  
Nano Particle ◽  
Dye Sensitized ◽  
Solar Cell Fabrication ◽  
Cell Fabrication

Deposition of TiO2 layers for dye-sensitized solar cells using nano-particle deposition system

2011 ◽  
Vol 11 (1) ◽  
pp. S122-S126 ◽  
Author(s):  
Yang-Hee Kim ◽  
Min-Saeng Kim ◽  
Kwang-Su Kim ◽  
Sung-Hoon Ahn ◽  
Caroline Sunyong Lee
Keyword(s):  
Solar Cells ◽  
Particle Deposition ◽  
Dye Sensitized Solar Cells ◽  
Nano Particle ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Fabrication of Conductors and Inductors by Nano-Particle Deposition through Direct Write Technology

2006 ◽  
Vol 3 (3) ◽  
pp. 121-128
Author(s):  
Jacob Colvin ◽  
Michael Carter ◽  
James Sears
Keyword(s):  
Magnetic Material ◽  
Particle Deposition ◽  
Nano Particles ◽  
Soft Magnetic Material ◽  
Direct Write ◽  
Nano Particle ◽  
Aerosol Formation ◽  
Soft Magnetic ◽  
Conductive Inks ◽  
Curing Method

Direct Write Technologies are being utilized in antennas, engineered structures, sensors, and tissue engineering. One form of the Direct Write Technologies is Maskless Mesoscale Material Deposition (M3D) for Optomec, Inc. M3D is a process that uses aerosol formation, transport and deposition. Inks for the M3D utilize nano-particles in suspension for deposition. Several different conductive inks were deposited with M3D and characterized for electrical resistivity and microstructure. Soft magnetic material was formulated as an ink suspension, deposited and characterized. This paper will report on the results obtained after sintering conductive nano-particle inks and soft magnetic material. Sintering was performed with a 2W frequency doubled Nd:YAG CW laser, a conventional muffle furnace and a novel photonic curing method. Depositions of various conductive inks were examined for physical dimensions (width and thickness) and microstructure. A study of the sintering characteristics if these ink was also included. This paper will also report on the results obtained from depositing a soft magnetic material. Permeability results were calculated from magnetic structures created with the deposition. These results are compared to conventional methods of soft magnetic material formation and construction. Physical properties of the deposited inks are also measured and reported.

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