水动力学研究与进展:英文版最新文献_第7页

A numerical study of violent sloshing problems with modified MPS method 用改进MPS方法对强晃动问题进行数值研究

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-08-01 DOI: 10.1016/S1001-6058(16)60779-5

Debadatta Jena , Kishore Chandra Biswal

{"title":"A numerical study of violent sloshing problems with modified MPS method","authors":"Debadatta Jena , Kishore Chandra Biswal","doi":"10.1016/S1001-6058(16)60779-5","DOIUrl":"10.1016/S1001-6058(16)60779-5","url":null,"abstract":"<div><p>A numerical study on violent liquid sloshing phenomenon in a partially filled rectangular container is carried out by using moving particle semi-implicit (MPS) method. The present study deals with the implementation of five modifications all together over the original MPS method. The modifications include improved source terms for pressure Poisson equation, special approximation technique for the representation of gradient differential operator, collective action of mixed free surface particle identification boundary conditions, effecting Neumann boundary condition on solving the PPE and fixing judiciously the parting distance among particles to prevent collision. The suitability of the kernel function used in the original MPS method along with these five modifications is investigated for violent sloshing problems. The present model ensures a good agreement between numerical results with the existing experimental observations. The model is successfully applied to a partially filled tank undergoing horizontal sinusoidal excitation to compute the sloshing wave amplitudes and pressure on tank walls. The assessment of dynamic behaviour manifested in terms of base shear, overturning moment and impact pressure load exerted on tank ceiling induced by violent sloshing motion using MPS method is not reported in the open literature and has been efficiently carried out in the present study.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 4","pages":"Pages 659-667"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60779-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4007730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Application of binding theory for seepage of viscoelastic fluid in a variable diameter capillary 粘弹性流体在变直径毛细管渗流中的结合理论应用

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-08-01 DOI: 10.1016/S1001-6058(16)60775-8

Er-long Yang (杨二龙) , Ting-ting Gu (谷婷婷) , Mei Wang (王梅) , Huan Li (李欢)

{"title":"Application of binding theory for seepage of viscoelastic fluid in a variable diameter capillary","authors":"Er-long Yang (杨二龙) , Ting-ting Gu (谷婷婷) , Mei Wang (王梅) , Huan Li (李欢)","doi":"10.1016/S1001-6058(16)60775-8","DOIUrl":"10.1016/S1001-6058(16)60775-8","url":null,"abstract":"<div><p>The polymer solution for polymer flooding is a viscoelastic fluid. There exist both shear flow and elongational flow when the polymer solution flows in a porous medium, where an additional dissipation is involved. The additional dissipation caused by elongational deformation is often ignored while studying the flow of the fluid in a porous medium. For a complex polymer solution, the generated elongational pressure drop cannot be ignored. In a capillary of fixed diameter, the polymer solution is only impacted by the shear force, and its rheological property is pseudoplastic. Therefore the variable diameter capillary and the converging-diverging flow model with different cross sections are required to describe the flow characteristics of the polymer solution in porous media more accurately. When the polymer solution flows through the port, we have the elongational flow and the polymer molecules undergo elongational deformation elastically. By using the mechanical energy balance principle and the minimum energy principle, a mathematical model of non-Newtonian fluid inlet flow was established by Binding. On the basis of the Binding theory, with the application of the theory of viscoelastic fluid flow in the circular capillary and the contraction – expansion tube, the relations between the viscoelastic fluid flow rate and the pressure drop are obtained.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 4","pages":"Pages 621-631"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60775-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4007933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical analysis of bubble dynamics in the diffuser of a jet pump under variable ambient pressure 变环境压力下喷射泵扩散管内气泡动力学的数值分析

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-06-01 DOI: 10.1016/S1001-6058(16)60763-1

Xin-ping Long (龙新平) , Qing-qing Wang (王晴晴) , Long-zhou Xiao (肖龙洲) , Jun-qiang Zhang (章君强) , Mao-sen Xu (徐茂森) , Wei-feng Wu (吴伟烽) , Bin Ji (季斌)

{"title":"Numerical analysis of bubble dynamics in the diffuser of a jet pump under variable ambient pressure","authors":"Xin-ping Long (龙新平) , Qing-qing Wang (王晴晴) , Long-zhou Xiao (肖龙洲) , Jun-qiang Zhang (章君强) , Mao-sen Xu (徐茂森) , Wei-feng Wu (吴伟烽) , Bin Ji (季斌)","doi":"10.1016/S1001-6058(16)60763-1","DOIUrl":"10.1016/S1001-6058(16)60763-1","url":null,"abstract":"<div><p>Recent studies have shown that the collapse of cavitation bubbles in a jet pump can generate an extremely high pressure with many potential applications. The dynamics of the bubble is governed by the Rayleigh-Plesset equation. With the bubble dynamics equation and the heat and mass transfer model solved with the Runge-Kutta fourth order adaptive step size method, the oscillations of the bubble in the diffuser of the jet pump are assessed under varied conditions. To obtain the pressure variation along the diffuser, the Bernoulli equation and the pressure measured in experiment are coupled. The results of simulation show that a transient motion of the bubbles can be obtained in the diffuser quantitatively, to obtain the pressure and temperature shock in the bubble. Moreover, increasing the outlet pressure coefficient would result in a more intense bubble collapsing process, which can be used in the subsequent studies of the cavitation applications. The predictions are compared with experiments with good agreement.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 3","pages":"Pages 510-519"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60763-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4036189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Development of a hybrid particle-mesh method for simulating free-surface flows 模拟自由表面流动的混合粒子网格方法的发展

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-06-01 DOI: 10.1016/S1001-6058(16)60751-5

Jakob Maljaars , Robert Jan Labeur , Matthias Möller , Wim Uijttewaal

引用次数: 1

Analyses of the stability of submerged ice blocks 水下冰块稳定性分析

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-06-01 DOI: 10.1016/S1001-6058(16)60757-6

Xin Zhao (赵新), Ji-jian Lian (练继建), Xiao-yan Song (宋小艳)

{"title":"Analyses of the stability of submerged ice blocks","authors":"Xin Zhao (赵新), Ji-jian Lian (练继建), Xiao-yan Song (宋小艳)","doi":"10.1016/S1001-6058(16)60757-6","DOIUrl":"10.1016/S1001-6058(16)60757-6","url":null,"abstract":"<div><p>This paper proposes the critical conditions for a submerged ice block beneath an intact ice cover to become unstable, as a fundamental component of any numerical model to successfully predict the ice jam formation or the ice jam release events. The flume model experimental and numerical simulation methods are both applied to analyze the stability of submerged ice blocks. The flume model experiment is first conducted, and the experimental results indicate that the influencing factors of the stability of a submerged ice block include the relative length, the relative water depth and the relative width. It was shown that the effect of the relative width on the stability of submerged ice blocks was not well studied. Based on the experimental results, <em>k</em> – ɛ the turbulence model is applied to establish a 3-D numerical model for studying the pressure distribution beneath submerged ice blocks. The effects of the relative width on the Venturi pressure and the leading edge pressure are evaluated. Finally, according to the force balance equation and the moment balance equation, this paper proposes a computational formula for the sliding and underturning critical conditions of submerged ice blocks, and the results are in good agreement with the experimental results.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 3","pages":"Pages 460-469"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60757-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4036033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modelling large deformation and soil–water–structure interaction with material point method: Briefing on MPM2017 conference 基于物质点法的大变形和土-水-结构相互作用建模:MPM2017会议简报

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-06-01 DOI: 10.1016/S1001-6058(16)60748-5

Alexander Rohe , Dongfang Liang

引用次数: 5

Validation of material point method for soil fluidisation analysis 土壤流化分析中物质点法的验证

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-06-01 DOI: 10.1016/S1001-6058(16)60753-9

Marco Bolognin , Mario Martinelli , Klaas J. Bakker , Sebastiaan N. Jonkman

引用次数: 0

Slope failure simulations with MPM 基于MPM的边坡破坏模拟