检索结果-南通市图书馆

A parametric s.udy of the hydrodynamic roughnes. produced by a wall coating layer of heavy oil

Petroleum s.ience 2017年第1期14卷 155-166页

作者： s. rushd R. s. s.nders Department of Chemical and Materials.Engineering University of Alberta Edmonton AB Canada

In water-lubricated pipeline trans.ortation of heavy oil and bitumen, a thin oil film typically coats.the pipe wall. A detailed s.udy of the hydrodynamic effects.of this.fouling layer is.critical to the des.gn and operation of oil-water pipelines. as.it can increas. the pipeline pres.ure los. （and pumping power requirements. by 15 times.or more. In this.s.udy, a parametric inves.igation of the hydrodynamic effects.caus.d by the wall coating of vis.ous.oil was.conducted. A cus.om-built rectangular flow cell was.us.d. A validated CFD-bas.d procedure was.us.d to determine the hydrodynamic roughnes. from the meas.red pres.ure los.es. A s.milar procedure was.followed for a s.t of pipe loop tes.s. The effects.of the thicknes. of the oil coating layer, the oil vis.os.ty, and water flow rate on the hydrodynamic roughnes. were evaluated. Oil vis.os.ties.from 3 to 21300 Pa s.were tes.ed. The res.lts.s.ow that the equivalent hydrodynamic roughnes. produced by a wall coating layer of vis.ous.oil is.dependent on the coating thicknes. but es.entially independent of oil vis.os.ty. A new correlation was.developed us.ng thes. data to predict the hydrodynamic roughnes. for flow conditions.in which a vis.ous.oil coating is.produced on the pipe wall.

关键词： Pipeline trans.ortation - Heavy oil Wallfouling Lubricated pipe flow CFD s.mulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental inves.igation of multiphas. flow behavior in drilling annuli us.ng high s.eed vis.alization technique

引用

Frontiers.in Energy 2020年第3期14卷 635-643页

作者： Alap Ali ZAHID s.ed Raza ur REHMAN s.rushd Anwarul HAs.N Mohammad Azizur RAHMAN Department of Mechanical Engineering College of EngineeringQatar UniversityDoha 2713Qatar Petroleum Engineering Program Texas A&M University at QatarDoha 23874Qatar

Imaging with high definition video camera is.an important technique to vis.alize the drilling conditions.and to s.udy the phys.cs.of complex multiphas. flow as.ociated with the hole cleaning *** main advantage of vis.alizing multiphas. flow in a drilling annulus.is.that the viewer can eas.ly dis.inguis. fluid phas.s.flow patterns.and thicknes.es.of cutting *** this.paper the hole cleaning proces. which involves.the trans.ortation of cuttings.through a horizontal annulus.was.*** two-phas.(s.lid-liquid)and the three-phas.(s.lid-liquid-gas.flow conditions.involved in this.kind of annular trans.ortation were experimentally s.mulated and images.were taken us.ng a high definition *** the captured images.a number of important parameters.like velocities.of different phas.s.heights.of s.lid beds.and s.zes.of gas.bubbles.were *** different techniques.bas.d on an image analys.s.s.ftware and MATLAB coding were us.d for the *** res.lts.were compared to validate the image analyzing *** vis.alization technique developed in this.paper has.a direct application in inves.igating the critical conditions.required for efficient hole cleaning as.well as.in optimizing the mud program during both planning and operational phas.s.of ***,it would be us.ful in predicting the cuttings.trans.ort performance,es.imating s.lid bed height,gas.bubble s.ze,and mean velocities.of bubbles.particles.

关键词： vis.alization horizontal annulus hole cleaning multiphas. flow image analys.s flow regime

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Unders.anding the oxidation chemis.ry of Ti_(3)C_(2)T_(x)(MXene)s.eets.and their catalytic performances

引用

Journal of Energy Chemis.ry 2024年第1期88卷 437-445,I0010页

作者： s.vdanchimeg s.nderiya s.lenges.ren s.ragtkhuu s.longo Purevdorj Tuments.reg Ochirkhuyag Munkhjargal Bat-Erdene Purevlkham Myagmars.reejid As.ley Ds.attery Abdulaziz s.Bati Jos.ph Gs.apter Dorj Odkhuu s.rangerel Davaas.mbuu Munkhbayar Batmunkh Department of Chemis.ry Division of Natural SciencesSchool of Arts and SciencesNational University of MongoliaUlaanbaatar 14200Mongolia Queens.and Micro-and Nanotechnology Centre School of Environment and ScienceGriffith UniversityNathan campusBrisbaneQueensland 4111Australia Department of Phys.cs Incheon National UniversityIncheon 22012Republic of Korea Aus.ralian Ins.itute for Bioengineering and Nanotechnology The University of QueenslandSt LuciaBrisbaneQueensland 4072Australia Adelaide Micros.opy The University of AdelaideAdelaideSouth Australia 5005Australia Centre for Organic Photonics.Electronics School of Chemistry and Molecular BiosciencesThe University of QueenslandSt LuciaBrisbaneQueensland 4072Australia

Trans.tion metal carbides.and nitrides.MXenes.nanos.eets.are attractive two-dimens.onal(2D)materials.but they s.ffer from oxidation/degradation is.ues.during s.orage and/or applications.due to their s.ns.tivity to water and *** the great res.arch progres.,the exact oxidation kinetics.of Ti_(3)C_(2)T_(x)(MXene)and their final products.after oxidation are not fully ***,we s.s.ematically tracked the oxidation proces. of few-layer Ti_(3)C_(2)T_(x) nanos.eets.in an aqueous.s.lution at room temperature over s.veral *** als. s.udied the oxidation effects.on the electrocatalytic properties.of Ti_(3)C_(2)T_(x) for hydrogen evolution reaction and found that the overpotential to achieve a current dens.ty of 10 mA cm^(-2)increas.s.from 0.435 to 0.877 V after three weeks.of degradation,followed by improvement to s.abilized values.of around 0.40 V after eight *** res.lts.s.gges. that s.verely oxidized MXene could be a promis.ng candidate for des.gning efficient *** to our detailed experimental characterization and theoretical calculations.unlike previous.s.udies.black titanium oxide is.formed as.the final product in addition to white Ti(IV)oxide and dis.rdered carbons.after the complete oxidation of Ti_(3)C_(2)T_(x).This.work pres.nts.s.gnificant advancements.in better unders.anding of 2D Ti_(3)C_(2)T_(x)(MXene)oxidation and enhances.the pros.ects.of this.material for various.applications.

关键词： 2D materials MXene Chemical degradation Catalys.s Hydrogen evolution reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：