【摘 要】
：
we discuss the construction of the FCT-stabilized finite element level-set-based method for for reaction-diffusion-convection equations on evolving-in-time surfaces.The level-set methodology is used f
论文部分内容阅读
we discuss the construction of the FCT-stabilized finite element level-set-based method for for reaction-diffusion-convection equations on evolving-in-time surfaces.The level-set methodology is used for an implicit prescription of an evolving surface,and high-order FCT/TVD stabilization methods are incorporated for the numerical treatment of arising convective/advective terms.
其他文献
Direct growth of graphene on Al2O3film is successfully achieved assisted with NiAl 2O4film on a SiO2substrate by chemical vapor deposition at 800 C.The Ni particles are first uniformly separated out o
在非贵金属催化剂中,氟、氮掺杂的碳材料[1]因其能实现较高的氧还原催化活性而备受关注.但是,如何设计并合成具有大比表面积、多活性位点的非贵金属催化剂材料仍然是一个挑战.本研究通过简单热解聚苯胺的铁络合物合成出Fe/Fe3N@F,N co-doped C的片状结构催化材料.该材料中氟、氮原子成功地嵌入到碳骨架,其比表面积高达1034m2/g.电化学测试分析表明：Fe/Fe3N@F,N co-dope
在酸性电解液中,金属Ru有较高的氧还原催化活性,但其表面容易被氧化而降低催化活性.为了改善金属Ru的催化性能,利用机械合金化法制备的Ru-M(M=Fe,Mo,W,Sn)[1,2]等催化剂,电催化活性和稳定性均比金属Ru高.为了改进催化剂的制备工艺,本文以Ru3(CO)12和Mo(CO)6为前驱体,在1,6-己二醇溶剂中采用回流法合成了Ru-Mo催化剂.Ru-Mo催化剂以Rux簇为主相,同时形成无定
本文测试了羧基和氨基修饰的多壁碳纳米管(Carbox-CNT、Amino-CNT)对氧还原反应的电催化活性.碳纳米管分别用0.5％Nafion溶液调制成浆状后附着在直径为5mm的玻炭电极表面，干燥后分别在氮气和氧气饱和的0.5 M硫酸溶液中进行测试，测试方法为线性电位扫描法，扫描速度为5mV/s.结果如图1所示，其中(a)为Carbox-CNT的扫描曲线，(b)为Amino-CNT的扫描曲线.Ca
本文制备了RGO改性的高度有序TiO2纳米管阵列.利用SEM和光电化学等方法对制备的电极进行了表征.SEM结果表明RGO均匀覆盖在TiO2纳米管的表面及侧面.光电化学结果显示,在可见光照射下降解甲基橙染料,RGO-TNTs显现出稳定性和明显增强的光电催化性能.
Palladium loading tantalum oxide(Pd/Ta2O5)particles were synthesized using reflux method.The X-ray diffraction(XRD)result reveals that Pd/Ta2O5 belongs to orthorhombic crystal phase.The cyclic voltamm
A simple and effective approach was demonstrated to synthesize flowerlike Pt nanocrystals on polydopamine(PDA)functionalized reduced oxide graphene(RGO).Inspired by mussels,the PDA/RGO composites were
氧还原反应(ORR)是燃料电池、金属空气电池等的阴极反应，研究高效ORR催化剂及ORR过程具有重要意义。目前，贵金属Pt仍然是ORR活性最高的催化剂，然而Pt资源有限，价格高昂，亟需寻找Pt替代催化剂。在各种非Pt催化剂中，氧化钴对ORR具有较高的活性。鉴于氧化钴价态丰富，表面结构复杂，文献中较少涉及氧化钴粒径、晶相、表面结构等对ORR活性影响的研究。本工作在实现氧化钴纳米粒子粒径、晶相控制的基础
Mathematical modelling of the flow mechanism of natural gas through unconventional hydrocarbon reservoirs,such as,shale gas or tight gas,results into nonlinear time-dependent convection-diffusion equa
Description of the three-dimensional procedure for numerical computation and visualization of steam flow in power plant condensers is presented in this paper.The purpose of the present study is to dev