Effect of generation number on properties of fluoroalkyl‐terminated hyperbranched polyurethane latexs and its films

2020 ◽  
Vol 137 (40) ◽  
pp. 49215
Author(s):  
Wei Xu ◽  
Wen Wang ◽  
Lifen Hao ◽  
Weijia Zhao ◽  
Hongna Liu ◽  
...  
Keyword(s):  
Generation Number ◽  
Hyperbranched Polyurethane

scholarly journals Analytical Assessment of (Al2O3–Ag/H2O) Hybrid Nanofluid Influenced by Induced Magnetic Field for Second Law Analysis with Mixed Convection, Viscous Dissipation and Heat Generation

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 498
Author(s):  
Wasim Ullah Khan ◽  
Muhammad Awais ◽  
Nabeela Parveen ◽  
Aamir Ali ◽  
Saeed Ehsan Awan ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Viscous Dissipation ◽  
Entropy Generation ◽  
Heat Generation ◽  
Transfer Rate ◽  
Second Law ◽  
Hybrid Nanofluid ◽  
Entropy Generation Number ◽  
Generation Number ◽  
Second Law Analysis

The current study is an attempt to analytically characterize the second law analysis and mixed convective rheology of the (Al2O3–Ag/H2O) hybrid nanofluid flow influenced by magnetic induction effects towards a stretching sheet. Viscous dissipation and internal heat generation effects are encountered in the analysis as well. The mathematical model of partial differential equations is fabricated by employing boundary-layer approximation. The transformed system of nonlinear ordinary differential equations is solved using the homotopy analysis method. The entropy generation number is formulated in terms of fluid friction, heat transfer and Joule heating. The effects of dimensionless parameters on flow variables and entropy generation number are examined using graphs and tables. Further, the convergence of HAM solutions is examined in terms of defined physical quantities up to 20th iterations, and confirmed. It is observed that large λ1 upgrades velocity, entropy generation and heat transfer rate, and drops the temperature. High values of δ enlarge velocity and temperature while reducing heat transport and entropy generation number. Viscous dissipation strongly influences an increase in flow and heat transfer rate caused by a no-slip condition on the sheet.

scholarly journals Estimating the diameter of airways susceptible for collapse using crackle sound

2009 ◽  
Vol 107 (5) ◽  
pp. 1504-1512 ◽  
Author(s):  
Arnab Majumdar ◽  
Zoltán Hantos ◽  
József Tolnai ◽  
Harikrishnan Parameswaran ◽  
Robert Tepper ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Tree Model ◽  
Generation Number ◽  
Airway Opening ◽  
Opening And Closing ◽  
Elastic Walls ◽  
Subsequent Injury

Airways that collapse during deflation generate a crackle sound when they reopen during subsequent reinflation. Since each crackle is associated with the reopening of a collapsed airway, the likelihood of an airway to be a crackle source is identical to its vulnerability to collapse. To investigate this vulnerability of airways to collapse, crackles were recorded during the first inflation of six excised rabbit lungs from the collapsed state, and subsequent reinflations from 5, 2, 1, and 0 cmH2O end-expiratory pressure levels. We derived a relationship between the amplitude of a crackle sound at the trachea and the generation number ( n) of the source airway where the crackle was generated. Using an asymmetrical tree model of the rabbit airways with elastic walls, airway vulnerability to collapse was also determined in terms of airway diameter D. During the reinflation from end-expiratory pressure = 0 cmH2O, the most vulnerable airways were estimated to be centered at n = 12 with a peak. Vulnerability in terms of D ranged between 0.1 and 1.3 mm, with a peak at 0.3 mm. During the inflation from the collapsed state, however, vulnerability was much less localized to a particular n or D, with maximum values of n = 8 and D = 0.75 mm. Numerical simulations using a tree model that incorporates airway opening and closing support these conclusions. Thus our results indicate that there are airways of a given range of diameters that can become unstable during deflation and vulnerable to collapse and subsequent injury.

Size-tunable fluorescent dendrimersomes via aggregation-induced emission

2022 ◽  
Author(s):  
Marilyne Bélanger-Bouliga ◽  
Brandon Andrade-Gagnon ◽  
Diep Thi Hong Nguyen ◽  
Nazemi Ali
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Third Generation ◽  
Thermodynamic Control ◽  
Aggregation Induced Emission ◽  
Generation Number ◽  
Dendrimer Generation

Tetraphenylethylene-functionalized amphiphilic Janus dendrimers of up to third generation are synthesized. Their self-assembly has been studied under kinetic and thermodynamic control. By varying the dendrimer generation number and the self-assembly...

Highly efficientin situtoughening of epoxy thermosets with reactive hyperbranched polyurethane

2014 ◽  
Vol 131 (16) ◽  
pp. n/a-n/a ◽  
Author(s):  
Bing Tang ◽  
Xiaobing Liu ◽  
Xiuli Zhao ◽  
Junhua Zhang
Keyword(s):  
Hyperbranched Polyurethane
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