基于Fluent圆管内黏性流体流动的多媒体教学的应用研究

Fluent是流体力学中通用性较强的商业CFD软件。将Fluent软件引入流体力学多媒体教学中,可对定常不可压缩流体在圆管内流动进行数值模拟,分析流体层流、紊流的两种流动状态,验证管内流体速度及切应力分布。实践表明,在流体力学课堂上配以Fluent数值模拟,有助于学生消化较难理解的理论知识,增强学习兴趣,提高教学效果。     

A view of Newton as a mathematician

In this article, we present certain topics such as quadrature of planar regions, introduced prior to the invention of calculus by Newton, and consider his other mathematical contributions, to binomial theorem and infinite series, cubics, theory of equations and imaginary roots. As the development of calculus and its enormous applications are well known, we will not discuss much about it. Earlier, he was in TIFR, Bangalore. His research interests include partial differential equations, homogenization, controllability and control problems, analysis, etc.     

Fluent软件在液压传动教学中的应用

根据液压传动课程的教学内容和特点,通过实例说明流体动力学软件Fluent在教学中的应用,直观展示了流体在元件内部的流动情况,速度、压力的定量分布规律,依此分析结构对流动特性及元件性能的影响。仿真教学有助于学生掌握抽象的流体力学理论,加深对元件工作原理的理解及仿真设计方法的使用,拓展了现有的教学方式,加强了教学与工程应用之间的有机结合。     

高温烟气冷却装置仿真与设计

高温烟气在实际生产活动以及船舶、航天航空等领域均有大量涉及,而如何对其进行冷却是亟待解决的问题.本文以某实际管道内的高温烟气为研究对象,利用Fluent软件数值仿真不同喷射参数条件下管道内烟气的冷却过程,并对所得仿真结果进行对比分析.仿真结果表明:采用圆周上均匀分布8个喷孔,单个喷孔流量为0.05 kg/s时,可满足烟气冷却要求.基于数值仿真结果,设计了适用于该管道结构的冷却装置.本研究结果对管道内高温烟气的冷却处理具有参考意义,所设计的冷却装置具有实际应用价值.     

圆柱周围湍流场的数值模拟

In practical problems, the variation of the free surface around a circular pier is severe. For the Fluent CFD, the multiphase flow models cannot be used together with the LES model to calculate the free surface. Present paper provides a two-step method which joints the 2D compressible ideal-gas equations and the LES model to calculate the 3D flow field with free surface around the pier. The effects of the free surface on the flow structures are studied in detail.     

Adults' prior exposure to print as a predictor of the legibility of text on paper and laptop computer

This study investigated the effects of variations in graphic elements that account for differences in speed and accuracy between reading text aloud from paper versus laptop computer. Variations in accurate reading-aloud performance are attributable to individual differences in the visual accessibility of information due to (1) the experimental manipulations of the independent variables, (2) the subjects' prior exposure to print within the culture, and (3) the educational attainment of the subject. A non-representative sample of 48 female survey interviewers (ages 38–72) were employed in the conduct of this study. Survey interviewers were selected because they gather information using laptop computers; the quality of the survey information collected may be directly associated with the legibility of computerized text on reader performance. Subjects completed a prior exposure to print questionnaire (Stanovich & West 1989) and a demographic data form (IDIQ). Repeated-measures analyses of variance were employed to examine individual differences in the speed and accuracy of reading-aloud performance for twenty-four conditions varying the levels of independent variables including: (1) Font (Times Roman, Helvetica, and Courier), (2) Justification (fully- justified versus left-justified), (3) Leading (single-spaced versus double-spaced), and (4) Mode of Presentation (paper versus laptop computer). Linear regression analyses found subjects' prior exposure to print significantly and positively related to predicting speed and miscue performance. The subjects' educational attainment significantly predicted miscue performance. Subjects' ages were not significantly related to performance. Results of this study inform computer programmers and designers who are responsible for developing standards and guidelines for legible computerized text for the effective access of accurate information.     

基于Fluent模拟的独头巷道通风流场分析

运用通风安全学和流体力学理论,建立独头巷道压入式通风的湍流模型。利用Fluent软件模拟独头巷道通风流场,并用Tecplot软件进行后处理,显示其速度矢量图。模拟显示了独头巷道的射流规律,模拟结果与理论相符,为独头巷道的通风研究提供了一条新的途径。     

基于Fluent仿真的防暴弹弹道系数解算

本文提出一种防暴弹丸的弹道系数仿真解算方法,利用Fluent空气动力学仿真软件,对低速防暴弹丸飞行时受力及空气运动情况进行数值模拟仿真,选取S-A单方程模型,采用密度基求解器仿真计算出弹丸的阻力系数,进一步推算出防暴弹丸的弹道系数。     

北京市传统大学生宿舍室内空气环境的模拟

本文旨在通过流场分布来研究北京市传统学生宿舍里的室内空气环境(包括室内压力场与速度场的分布情况)。文中采用k-ε双方程湍流模型来模拟空气介质，应用计算流体力学(CFD)的方法来求解室内空气流动，运用有限体积法来处理控制方程，并用Fluent模拟流场分布结果。分析结果表明，学生床上的通风情况跟床的位置有很大的关系。     

论良渚玉器的审美特征

在玉器制作的过程中,良渚先民体现了日益觉醒的主体意识。其玉器在制作中以情感和想象力为动力,在尊重实用规律的基础上形成了特殊的造型特点。良渚玉器以玉琮为代表,追求造型与用途、纹饰和玉质相匹配。造型简洁质朴而意蕴淳朴;外部柔和而有内在张力;形体流畅而富有表现力,并与纹饰和玉质搭配和谐。神人兽面纹为主和鸟纹、蛇纹构成了良渚礼器纹饰系统。表现方法上讲究视角的多元性、构图的整体性,整体构图的疏密有致和均匀分布。