arXiv: Computational Physics最新文献_第9页

Insights on finite size effects in Ab-initio study of CO adsorption and dissociation on Fe 110 surface Fe - 110表面CO吸附和解离的Ab-initio研究中有限尺寸效应的见解

arXiv: Computational Physics Pub Date : 2016-03-15 DOI: 10.1063/1.4959990

A. Chakrabarty, O. Bouhali, N. Mousseau, C. Becquart, F. E. Mellouhi

引用次数: 16

Onsager's Cross Coupling Effects in Gas Flows Confined to Micro-channels 微通道内气体流动的Onsager交叉耦合效应

arXiv: Computational Physics Pub Date : 2016-02-26 DOI: 10.1103/PhysRevFluids.1.044102

Ruijie Wang, Xinpeng Xu, K. Xu, T. Qian

{"title":"Onsager's Cross Coupling Effects in Gas Flows Confined to Micro-channels","authors":"Ruijie Wang, Xinpeng Xu, K. Xu, T. Qian","doi":"10.1103/PhysRevFluids.1.044102","DOIUrl":"https://doi.org/10.1103/PhysRevFluids.1.044102","url":null,"abstract":"In rarefied gases, mass and heat transport processes interfere with each other, leading to the mechano-caloric effect and thermo-osmotic effect, which are of interest to both theoretical study and practical applications. We employ the unified gas-kinetic scheme to investigate these cross coupling effects in gas flows in micro-channels. Our numerical simulations cover channels of planar surfaces and also channels of ratchet surfaces, with Onsager's reciprocal relation verified for both cases. For channels of planar surfaces, simulations are performed in a wide range of Knudsen number and our numerical results show good agreement with the literature results. For channels of ratchet surfaces, simulations are performed for both the slip and transition regimes and our numerical results not only confirm the theoretical prediction [Phys. Rev. Lett. 107, 164502 (2011)] for Knudsen number in the slip regime but also show that the off-diagonal kinetic coefficients for cross coupling effects are maximized at a Knudsen number in the transition regime. Finally, a preliminary optimization study is carried out for the geometry of Knudsen pump based on channels of ratchet surfaces.","PeriodicalId":8424,"journal":{"name":"arXiv: Computational Physics","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74389567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

On sparse reconstructions in near-field acoustic holography using the method of superposition 基于叠加法的近场声全息稀疏重建研究

arXiv: Computational Physics Pub Date : 2016-01-19 DOI: 10.1142/S0218396X16500090

N. M. Abusag, D. Chappell

{"title":"On sparse reconstructions in near-field acoustic holography using the method of superposition","authors":"N. M. Abusag, D. Chappell","doi":"10.1142/S0218396X16500090","DOIUrl":"https://doi.org/10.1142/S0218396X16500090","url":null,"abstract":"The method of superposition is proposed in combination with a sparse $ell_1$ optimisation algorithm with the aim of finding a sparse basis to accurately reconstruct the structural vibrations of a radiating object from a set of acoustic pressure values on a conformal surface in the near-field. The nature of the reconstructions generated by the method differs fundamentally from those generated via standard Tikhonov regularisation in terms of the level of sparsity in the distribution of charge strengths specifying the basis. In many cases, the $ell_1$ optimisation leads to a solution basis whose size is only a small fraction of the total number of measured data points. The effects of changing the wavenumber, the internal source surface and the (noisy) acoustic pressure data in general will all be studied with reference to a numerical study on a cuboid of similar dimensions to a typical loudspeaker cabinet. The development of sparse and accurate reconstructions has a number of advantageous consequences including improved reconstructions from reduced data sets, the enhancement of numerical solution methods and wider applications in source identification problems.","PeriodicalId":8424,"journal":{"name":"arXiv: Computational Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77980648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Numerical Investigation of Evaporation Induced Self-Assembly of Sub-Micron Particles Suspended in Water 悬浮在水中的亚微米粒子蒸发诱导自组装的数值研究

arXiv: Computational Physics Pub Date : 2016-01-04 DOI: 10.1115/MNHMT2016-6373

Raihan Tayeb, Yijin Mao, Yuwen Zhang

引用次数: 1

Localizing energy in granular materials 在颗粒状材料中定位能量

arXiv: Computational Physics Pub Date : 2015-12-18 DOI: 10.1063/1.4937903

M. Przedborski, T. Harroun, S. Sen

引用次数: 15

Adaptive algebraic multigrid on SIMD architectures SIMD体系结构上的自适应代数多重网格

arXiv: Computational Physics Pub Date : 2015-12-14 DOI: 10.22323/1.251.0036

S. Heybrock, M. Rottmann, Peters Georg, T. Wettig