Journal of Applied Mechanics最新文献

筛选
英文 中文
The Influence of Dimensionality on the Rate of Diffusive Escape From an Energy Well. 维数对能量井扩散逸出速率的影响。
IF 2.6
Journal of Applied Mechanics Pub Date : 2012-05-01 Epub Date: 2012-04-04 DOI: 10.1115/1.4005895
L B Freund
{"title":"The Influence of Dimensionality on the Rate of Diffusive Escape From an Energy Well.","authors":"L B Freund","doi":"10.1115/1.4005895","DOIUrl":"https://doi.org/10.1115/1.4005895","url":null,"abstract":"<p><p>A commonly used idealization when describing separation of a chemical bond between molecules is that of an energy well which prescribes the dependence of energy of interaction between the molecules in terms of a reaction coordinate. The energy difference between the peak to be overcome and the root of the well is the so-called activation energy, and the overall shape of the well dictates the kinetics of separation through a constitutive assumption concerning transport. An assumption tacit in this description is that the state of the bond evolves with only a single degree of freedom-the reaction coordinate-as the system explores its energy environment under random thermal excitation. In this discussion we will consider several bonds described by one and the same energy profile. The cases differ in that the energy profile varies along a line extending from the root of the well in the first case, along any radial line in a plane extending from the root of the well in a second case, and along any radial line in space extending from the root of the well in a third case. To focus the discussion we determine the statistical rate of escape of states from the well in each case, requiring that the profile of the well is the same in all three cases. It is found that the rates of escape each depend exponentially on the depth of the well but that the coefficients of the exponential vary with depth of the well differently in the three cases considered.</p>","PeriodicalId":508156,"journal":{"name":"Journal of Applied Mechanics","volume":"79 3","pages":"31012-NaN"},"PeriodicalIF":2.6,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4005895","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32392067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Model of Pressure and Flow Distribution in Branching Networks. 分支网络中压力和流量分布模型。
IF 2.6
Journal of Applied Mechanics Pub Date : 1980-06-01 DOI: 10.1115/1.3153650
A S Popel
{"title":"A Model of Pressure and Flow Distribution in Branching Networks.","authors":"A S Popel","doi":"10.1115/1.3153650","DOIUrl":"https://doi.org/10.1115/1.3153650","url":null,"abstract":"<p><p>The objective of this work is to provide a mechanical description of steady-state flow of Newtonian fluid in a branching network that consists of rigid vessels of different diameters. Solution of this problem is of importance for better understanding of the mechanics of blood flow within the microcirculation. The developed branching network model predicts a wide distribution of the hydrodynamic pressure and flow in the vessels of the same caliber (flow heterogeneity). The obtained results are compared with predictions of a simple series-parallel network model. It is shown that this model provides an accurate approximation to the values of the mean pressure and flow given by the branching network model.</p>","PeriodicalId":508156,"journal":{"name":"Journal of Applied Mechanics","volume":"47 2","pages":"247-253"},"PeriodicalIF":2.6,"publicationDate":"1980-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.3153650","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35173193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信