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CAPTURE EFFECT OF ELECTRORHEOLOGICAL SUSPENSIONS IN FLOW FIELD 被引量:4
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作者 ZHU Shisha SUN Hongli +1 位作者 HUANG Yijian WANG Qixin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2007年第2期97-100,共4页
According to the results of experiments and theoretical analysis, a phenomenon called "capture effect" is put forward, which could be used to describe the particles dynamic behavior of electrorheological (ER) susp... According to the results of experiments and theoretical analysis, a phenomenon called "capture effect" is put forward, which could be used to describe the particles dynamic behavior of electrorheological (ER) suspensions. Then a "structure-force" mathematical model is established to explain this effect based on electrostatic energy density equation. The analysis results show that the dynamic coupling process of ER suspensions under an external electric filed is the function not only of the electric intensity, but also of the dielectric properties and the structure form. 展开更多
关键词 Electrorheological (ER) suspensions dynamics capture effect dynamic coupling
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Statistics of Polymer Capture by a Nanopore:A Brownian Dynamics Simulation Study 被引量:1
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作者 Ming-ming Ding Xiao-zheng Duan +1 位作者 卢宇源 石彤非 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2015年第5期674-679,共6页
We investigate the statistics of polymer capture by a nanopore using Brownian dynamics simulations. It is found that when the velocity flux is greater than a critical velocity flux, the capture picture is a random sel... We investigate the statistics of polymer capture by a nanopore using Brownian dynamics simulations. It is found that when the velocity flux is greater than a critical velocity flux, the capture picture is a random selection process, otherwise it tends to a statistical process governed by energetic considerations. In addition, the chain ends capture probability decreases as the chain length increases and satisfies a power-law scaling of P0(N)-N^-0.8. 展开更多
关键词 Polymer capture Critical velocity flux Brownian dynamics
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Compact fluidized bed sorber for CO_2 capture 被引量:2
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作者 Parinya Khongprom Dimitri Gidaspow 《Particuology》 SCIE EI CAS CSCD 2010年第6期531-535,共5页
Multiphase CFD is used to design a compact fluidized bed sorber for CO2 removal from flue gases using sodium or potassium carbonate pellets. The sorber sizes are much smaller than commercial amine absorbers and smalle... Multiphase CFD is used to design a compact fluidized bed sorber for CO2 removal from flue gases using sodium or potassium carbonate pellets. The sorber sizes are much smaller than commercial amine absorbers and smaller than other proposed dry adsorbers. The size reduction is due to the elimination of dilute regions that cause bypassing. With proper solids feeding we eliminated the usual core-annular regime found in circulating fluidized beds. 展开更多
关键词 Separation science Flue gas Carbon capture Multiphase flow Computational fluid dynamics
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Adsorption of carbon dioxide on amine-modified TiO_2 nanotubes 被引量:4
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作者 Fujiao Song Yunxia Zhao Qin Zhong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2013年第3期554-560,共7页
TiO2 nanotubes (TiNT) were prepared by a hydrothermal treatment and modified by three kinds of amines,namely ethylenediamine,polyetherimide and tetraethylenepentamine (TEPA),to study their CO2 adsorption propertie... TiO2 nanotubes (TiNT) were prepared by a hydrothermal treatment and modified by three kinds of amines,namely ethylenediamine,polyetherimide and tetraethylenepentamine (TEPA),to study their CO2 adsorption properties from gas streams.The resultant samples were characterized by X-ray diffraction,transmission electron microscopy,and infrared spectroscopy,as well as low temperature N 2 adsorption.CO2 capture was investigated in a dynamic packed column at 30℃.TEPA-modified TiO2 nanotubes showed the highest adsorption capacity of 167.64 mg/g because it had the highest amino-group content among the three amines.CO2 fixation on TiNT impregnated by TEPA was investigated at 30,50,and 70℃,and the adsorption capacity increased slightly with temperature.Following the adsorption step,the sorbents were regenerated by temperature programmed desorption,and the TiNT-TEPA sample,as CO2 sorbent,was found to be readily regenerated and energy-efficient.The cycle test also revealed that the TiNT-TEPA adsorbent is fairly stable,with only a 5% drop in the adsorption capacity after 10 adsorption/desorption cycles.In addition,the CO2 adsorption behavior was investigated with the deactivation model,and which showed an excellent prediction for the TiNT-TEPA breakthrough curves. 展开更多
关键词 CO2 capture TiO2 nanotubes amine-modified dynamic adsorption deactivation model
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Simulating orthokinetic heterocoagulation and cluster growth in destabilizing suspensions
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作者 Fabian Billow Hermann Nirschl Willy Dorfler 《Particuology》 SCIE EI CAS CSCD 2017年第2期117-128,共12页
Using direct numerical simulation, we investigate the coagulation behavior of non-Brownian colloidal particles as exemplified by Al2O3 particles. This yields the so-called capture efficiency, for which we give an anal... Using direct numerical simulation, we investigate the coagulation behavior of non-Brownian colloidal particles as exemplified by Al2O3 particles. This yields the so-called capture efficiency, for which we give an analytical expression, as well as other time-dependent variables such as the cluster growth rate. Instead of neglecting or strongly approximating the hydrodynamic interactions between particles, we include hydrodynamic and non-hydrodynamic interactions in a Stokesian dynamics approach and a comprehensive modeling of the interparticle forces. The resulting parallelized simulation framework enables us to investigate the dynamics of polydisperse particle systems composed of several hundred particles at the same high level of modeling we used for a close investigation of the coagulation behavior of two unequal particles in shear flow. Appropriate cluster detection yields all the information about large destabilizing systems, which is needed for models used in flow-sheet simulations. After non-dimensionalization, the results can be generalized and applied to other systems tending to secondary coagulation 展开更多
关键词 Destabilization Coagulation capture efficiency Al2O3 Cluster detection Stokesian dynamics
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