Simulation of Size Distributions of TiO2 Nanoparticles in a Propane/Air FlameThe authors are grateful for a research grant from Shanghai Education Committee (07ZZ180), a fund of the Second Shanghai Key Discipline Construction Plan of Shanghai Municipal Education Commission (P1701), a research grant from Material Science and Engineering fund, a research grant from Nanomaterials and a science fund of Dalian University of Technology.

nano Online ◽  
2016 ◽  
Author(s):  
Hongyong Xie ◽  
Shi Chen
Keyword(s):  
Tio2 Nanoparticles ◽  
Material Science ◽  
Size Distributions ◽  
Science And Engineering ◽  
Education Committee ◽  
University Of Technology ◽  
Education Commission ◽  
Research Grant

Morphology of Voltage-Triggered Ordered Wrinkles of a Dielectric Elastomer Sheet

2017 ◽  
Vol 84 (11) ◽  
Author(s):  
Guoyong Mao ◽  
Lei Wu ◽  
Xueya Liang ◽  
Shaoxing Qu
Keyword(s):  
High Voltage ◽  
Optical Sensor ◽  
Material Science ◽  
Dielectric Elastomer ◽  
Theoretical Studies ◽  
Science And Engineering ◽  
Future Design ◽  
Experimental And Theoretical Studies ◽  
Theory And Experiment ◽  
Good Agreement

Wrinkles widely existing in sheets and membranes have attracted a lot of attention in the fields of material science and engineering applications. In this paper, we present a new method to generate ordered (striplike) and steady wrinkles of a constrained dielectric elastomer (DE) sheet coated with soft electrodes on both sides subjected to high voltage. When the voltage reaches a certain value, wrinkles will nucleate and grow. We conduct both experimental and theoretical studies to investigate the wavelength and amplitude of the wrinkle. The results show a good agreement between theory and experiment. Moreover, the amplitude and wavelength of ordered wrinkles can be tuned by varying the prestretch and geometry of the DE sheet, as well as the applying voltage. This study can help future design of DE transducers such as diffraction grating and optical sensor.

Simulation of Size Distributions of TiO2 Nanoparticles in a Propane/Air Flame

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Hongyong Xie ◽  
Shi Chen
Keyword(s):  
Tio2 Nanoparticles ◽  
Radiant Energy ◽  
Particle Growth ◽  
Collision Kernel ◽  
Wall Region ◽  
Size Distributions ◽  
Particle Volume ◽  
Simple Method ◽  
Wall Functions ◽  
Number Frequency

Size distributions of TiO2 nanoparticles synthesized in a propane/air flame CVD process have been simulated by CFD code Fluent. The flame is simulated by EDM and standard k-? model with non-equilibrium wall functions in the wall region. SIMPLE method is selected for pressure-velocity coupling and the convection term is discretized with first-order upwind scheme. Radiant energy absorption and irradiant are incorporated in the enthalpy balance by P1 model. Particle growth and size distributions are simulated by the implementation of integral collision kernel in particle dynamics and the condition of particle volume conservation into CFD code Fluent. Comparisons on number frequency size distributions between measured and predicted have been made and the results showed that the integral collision kernel gave reasonable predictions on both size and size distributions.

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