Design and evaluation of a silicon based multi-nozzle for addressable jetting using a controlled flow rate in electrohydrodynamic jet printing

2008 ◽  
Vol 93 (24) ◽  
pp. 243114 ◽  
Author(s):  
Jun-Sung Lee ◽  
Sang-Yoon Kim ◽  
Young-Jae Kim ◽  
Jaehong Park ◽  
Yong Kim ◽  
...  
Keyword(s):  
Flow Rate ◽  
Electrohydrodynamic Jet Printing ◽  
Jet Printing ◽  
Controlled Flow ◽  
Silicon Based

Numerical Study on the Electrohydrodynamic Jet Printing

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Xue Yang ◽  
Shuobang Wang ◽  
Zhifu Yin ◽  
Jili Wang ◽  
Wei Hu
Keyword(s):  
Flow Rate ◽  
Applied Voltage ◽  
Formation Process ◽  
High Efficiency ◽  
Numerical Study ◽  
Low Cost ◽  
Element Model ◽  
Jet Formation ◽  
Electrohydrodynamic Jet Printing ◽  
Jet Printing

Abstract Electrohydrodynamic (EHD) printing is an alternative method to fabricate high-resolution micro- and nanostructures with high efficiency, low cost, and low pollution. Numerical simulation is an effective approach to systematically investigate the formation process of EHD jet. However, there are a few articles performing this work. In this study, a finite element model was established. The jet formation process and jetting modes were analyzed. The influence of applied voltage and printing distance on the maximum electric field near the nozzle tip was investigated. The effect of flow rate on the jet diameters was studied. Comparison between numerical and experimental results demonstrated that the proposed simulation model had a high potential for EHD jet analysis. According to the optimized printing conditions (printing distance of 200–300 μm, applied voltage of ∼1100 V, and flow rate of 0.1–0.3 ml/h), stable EHD jet can generate and polyvinyl pyrrolidone (PVP) lines with minimum line-width of 0.9 μm can be printed onto the glass slide.

Hydraulic model of a water cooling system in a chemical plant

1988 ◽  
Vol 53 (4) ◽  
pp. 788-806
Author(s):  
Miloslav Hošťálek ◽  
Jiří Výborný ◽  
František Madron
Keyword(s):  
Flow Rate ◽  
Cooling System ◽  
Cooling Water ◽  
Graph Algorithm ◽  
Automatic Generation ◽  
Hydraulic Calculation ◽  
Return Flow ◽  
Flow Rates ◽  
Pressure Losses ◽  
Controlled Flow

Steady state hydraulic calculation has been described of an extensive pipeline network based on a new graph algorithm for setting up and decomposition of balance equations of the model. The parameters of the model are characteristics of individual sections of the network (pumps, pipes, and heat exchangers with armatures). In case of sections with controlled flow rate (variable characteristic), or sections with measured flow rate, the flow rates are direct inputs. The interactions of the network with the surroundings are accounted for by appropriate sources and sinks of individual nodes. The result of the calculation is the knowledge of all flow rates and pressure losses in the network. Automatic generation of the model equations utilizes an efficient (vector) fixing of the network topology and predominantly logical, not numerical operations based on the graph theory. The calculation proper utilizes a modification of the model by the method of linearization of characteristics, while the properties of the modified set of equations permit further decrease of the requirements on the computer. The described approach is suitable for the solution of practical problems even on lower category personal computers. The calculations are illustrated on an example of a simple network with uncontrolled and controlled flow rates of cooling water while one of the sections of the network is also a gravitational return flow of the cooling water.

High-resolution additive direct writing of metal micro/nanostructures by electrohydrodynamic jet printing

2021 ◽  
Vol 543 ◽  
pp. 148800
Author(s):  
Wuhao Zou ◽  
Haibo Yu ◽  
Peilin Zhou ◽  
Ya Zhong ◽  
Yuechao Wang ◽  
...  
Keyword(s):  
High Resolution ◽  
Direct Writing ◽  
Electrohydrodynamic Jet Printing ◽  
Jet Printing

Electrostatic Sensor for Real–Time Mass Flow Rate Measurement of Particle Conveying in Pneumatic Pipeline

2012 ◽  
Author(s):  
Mohd. Fua’ad Rahmat ◽  
Wee Lee Yaw
Keyword(s):  
Real Time ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Cross Correlation ◽  
High Accuracy ◽  
Industrial Processes ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Controlled Flow

This paper discussed the electrostatic sensors that have been constructed for real–time mass flow rate measurement of particle conveying in a Pneumatic pipeline. Many industrial processes require continuous, smooth, and consistent delivery of solids materials with a high accuracy of controlled flow rate. This requirement can only be achieved by installing a proper measurement system. Electrostatic sensor offers the most inexpensive and simplest means of measuring solids flows in pipes. Key words: Electrostatic sensor, cross-correlation, peripheral velocity

Relationship between flow rate and NO production in postnatal mesenteric arteries

2001 ◽  
Vol 280 (1) ◽  
pp. G43-G50 ◽  
Author(s):  
Kristina M. Reber ◽  
Gennifer M. Mager ◽  
Charles E. Miller ◽  
Philip T. Nowicki
Keyword(s):  
Flow Rate ◽  
Kinase Inhibitor ◽  
Age Groups ◽  
Mesenteric Arteries ◽  
No Production ◽  
Herbimycin A ◽  
Wide Range ◽  
Intracellular Ca ◽  
Controlled Flow

We studied mesenteric arterial arcades from 3- and 35-day-old swine to determine the relationship between perfusate flow rate and release of nitric oxide (NO) into mesenteric effluent. Mesenteric arterial arcades were perfused under controlled-flow conditions with a peristaltic pump using warm oxygenated Krebs buffer. Basal rates of NO production were 43.6 ± 4.2 vs. 12.1 ± 2.5 nmol/min in 3- vs. 35-day-old mesentery during perfusion at in vivo flow rates (9 vs. 20 ml/min, respectively). Rate of NO production was directly related to flow rate over a wide range of flows (5–40 ml/min) in 3- but not 35-day-old mesentery. Both age groups demonstrated a brisk, albeit brief, increase in NO production in response to infusion of NO-dependent vasodilator substance P (10−8 M/min). Tyrosine kinase inhibitor herbimycin A andl-arginine analog l-NMMA significantly attenuated flow-induced increase in NO production, and phosphatase inhibitor phenylarsine oxide increased magnitude of flow-induced increase in NO production in 3-day-olds. Removal of extracellular Ca2+ and depletion of intracellular Ca2+ stores (Ca2+-free Krebs with EGTA plus thapsigargin) had no effect on NO production in either group. Thus, basal rate of NO production is greater in mesenteric arterial arcades from 3- than from 35-day old swine, a direct relationship between flow rate and NO production rate is present in mesentery from 3- but not 35-day-olds, and phosphorylation events are necessary for this interaction to occur.

Improved electrochromic device performance from silver grid on flexible transparent conducting electrode prepared by electrohydrodynamic jet printing

2017 ◽  
Vol 5 (48) ◽  
pp. 12800-12806 ◽  
Author(s):  
Jieun Lee ◽  
Youngwoo Lee ◽  
Jinhyeok Ahn ◽  
Jihoon Kim ◽  
Sukeun Yoon ◽  
...  
Keyword(s):  
Electrochromic Device ◽  
Device Performance ◽  
Transparent Conducting Electrode ◽  
Ito Film ◽  
Transparent Conducting ◽  
Conducting Electrode ◽  
Electrohydrodynamic Jet Printing ◽  
Jet Printing

Silver grid printed on ITO film through EHD jet printing as a transparent conducting electrode improves electrochromic performances of soft ECDs.

Drop-on-Demand Printing of Carbon Black Ink by Electrohydrodynamic Jet Printing

2012 ◽  
Vol 12 (1) ◽  
pp. 446-450 ◽  
Author(s):  
Sung Yul Back ◽  
Chi Ho Song ◽  
Seongil Yu ◽  
Hyoung Jin Lee ◽  
Beom Soo Kim ◽  
...  
Keyword(s):  
Carbon Black ◽  
On Demand ◽  
Drop On Demand ◽  
Electrohydrodynamic Jet Printing ◽  
Jet Printing

Direct patterning of conductive carbon nanotube/polystyrene sulfonate composites via electrohydrodynamic jet printing for use in organic field-effect transistors

2016 ◽  
Vol 4 (22) ◽  
pp. 4912-4919 ◽  
Author(s):  
Yong Jin Jeong ◽  
Xinlin Lee ◽  
Jaehyun Bae ◽  
Jaeyoung Jang ◽  
Sang Woo Joo ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Polystyrene Sulfonate ◽  
Organic Field Effect Transistors ◽  
Direct Patterning ◽  
Electrohydrodynamic Jet Printing ◽  
Electrohydrodynamic Printing ◽  
Jet Printing

Conductive MWCNT/PSS composites have been directly patterned via electrohydrodynamic printing for application as source/drain electrodes in organic field-effect transistors.

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