Applied Rheology最新文献_第7页

Reinforcement placement on mechanics and deformation of stepped reinforced retaining wall experimental study of characteristics 配筋对阶梯式加筋挡土墙力学和变形特性的影响试验研究

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0131

Yalin Zhu, Renyi Chen, Liming Wu, Qianqi Xu, Zijian Zhan

引用次数: 1

Exergy analyses of two and three stage cryogenic cycles 两级和三级低温循环的火用分析

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0134

Musa Atasbak, Arzu Keven, Rabi Karaali̇

{"title":"Exergy analyses of two and three stage cryogenic cycles","authors":"Musa Atasbak, Arzu Keven, Rabi Karaali̇","doi":"10.1515/arh-2022-0134","DOIUrl":"https://doi.org/10.1515/arh-2022-0134","url":null,"abstract":"Abstract Cryogenics has an important influence on industry and science. In this study, optimum working conditions are obtained by applying exergy analysis and local optimization methods to two- and three-stage vapor compression cascade cryogenic cycle. The first and second laws of thermodynamics, exergy analysis, and local optimization methods are applied to the two- and three-stage cascade cryogenic cycle. By considering the needs and demands, it is possible to create new cycles by adding new devices and/or new stages to these cycles. The results of the optimum operating conditions are obtained for the two- and three-stage vapor compression cascade cryogenic cycle. It is seen that to achieve high COP values and high efficiency; it is necessary to reduce the compression ratio of the compressor as much as the fluid allows. For the two-stage cycle, the minimum total work required for cryogenic cooling is around P 7 = 2,400 kPa. The COP value is 0.30 between P 7 = 2,400 and 2,800 kPa, and the maximum exergy efficiency is obtained around 0.235. It is seen operating the first-stage compressor at high pressures increases the total losses of the entire cycle from 7,500 to 18,550 kW. The increase in total exergy losses is around 247%, and operating the first-stage compressor at high pressures increases the exergy efficiency of the entire cycle. The increase in total exergy efficiency is around 160%. When the second-stage compressor is operated at low pressure, the COP value increases by 2%, the exergy efficiency increases by 20%, and the exergy losses decrease by around 40%.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"32 1","pages":"190 - 204"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43292894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Modeling thixotropic break-down behavior of dense anaerobically digested sludge 模拟密集厌氧消化污泥的触变分解行为

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0121

M. Terashima, Yoko Kotegawa, Meng Sun, Bing Liu, H. Yasui

引用次数: 0

Rheological thixotropy and pasting properties of food thickening gums orienting at improving food holding rate 以提高食品保持率为导向的食品增稠胶的流变触变性和糊化性能

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0127

Yu-Dong Fan, Lixun Zhang, Xing-cui Wang, Keyi Wang, Lan Wang, Zhenhan Wang, Feng Xue, Jinghui Zhu, Chao Wang

引用次数: 2

Mechanical properties of sandstone under hydro-mechanical coupling 水-力耦合作用下砂岩力学特性研究

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0120

T. Tan, Yanlin Zhao, Xun Zhao, L. Chang, Sheng Ren

{"title":"Mechanical properties of sandstone under hydro-mechanical coupling","authors":"T. Tan, Yanlin Zhao, Xun Zhao, L. Chang, Sheng Ren","doi":"10.1515/arh-2022-0120","DOIUrl":"https://doi.org/10.1515/arh-2022-0120","url":null,"abstract":"Abstract Study of mechanical properties of rock under hydro-mechanical coupling. The MTS815 rock mechanics system is used to perform triaxial compression tests of water-saturated sandstones under different confining pressures and pore water pressures. The results show that the peak deviation stress and its corresponding axial strain, residual deviation stress, initial deviation stress of dilation and deformation modulus of water-saturated sandstone are related to pore water pressure and confining pressure. They decrease with the increase of pore water pressure and increase with the increase of confining pressure. Poisson’s ratio and angle of rupture of water-saturated sandstone increase with pore water pressure. Based on the effective stress principle and Mohr–Coulomb criterion, the effective cohesion and effective residual cohesion of sandstone are 11.49 and 3.13 MPa, respectively, and the effective angle of internal friction and effective residual angle of internal friction are 38.32° and 25.32°, respectively. In addition, according to the variation relationship of sandstone strength, the relative strength criterion of sandstone under hydro-mechanical coupling is established.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"32 1","pages":"8 - 21"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44235803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 19

Determining the gas accumulation period using fluid inclusion observations: Xiang Zhong Basin, China 利用流体包裹体观测确定天然气聚集期：中国湘中盆地

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0126

Wei Zhu, Yongdi Qi, Shixin Dai, Mingsu Shen

{"title":"Determining the gas accumulation period using fluid inclusion observations: Xiang Zhong Basin, China","authors":"Wei Zhu, Yongdi Qi, Shixin Dai, Mingsu Shen","doi":"10.1515/arh-2022-0126","DOIUrl":"https://doi.org/10.1515/arh-2022-0126","url":null,"abstract":"Abstract There are a large number of natural gas shows in the Upper Paleozoic of the central Hunan Basin. However, the hydrocarbon accumulation process was complicated due to the strong tectonic reformation in this area. A study of the natural gas accumulation period is of significance for determining gas accumulation models. In this research, the fluid inclusion samples were tested, the fluid inclusion occurrence characteristics, uniform temperature data, and reservoir evolution were analyzed, and four diagenetic periods and four diagenetic periods and three hydrocarbon accumulation periods were identified. (i) For the syntaxial stage, the filling is dark and nonluminous, and the fluid captured by the overgrowing cement around the particles is mainly seawater; (ii) for the (Early) Mesogenetic burial stage, the calcite cement grows around the particles or micritic calcite matrix, and the fluid captured is mainly brine; (iii) for (Late) Mesogenetic burial stage, two sets of decomposed fissures developed in massive calcite colloids with non-luminous gas-rich hydrocarbon inclusions within the crystals; and (iv) for Telogenetic burial stage, weakly fluorescent pure gaseous hydrocarbon inclusions are developed in luminescent calcite veins. The result indicates that the organic inclusions in the Lower Carboniferous of the central Hunan Basin are dominated by weakly fluorescent and nonfluorescent rich gas inclusions and pure gas-phase inclusions, with three stages of hydrocarbon filling. By integrating the average homogenization temperatures on burial curves, the three charging orders correspond to 260–250 Ma during the Late Permian, 249–245 Ma during the Early Triassic, and 208–170 Ma during the Late Triassic. Dense reservoir characteristics reveal deep basin gas reservoir in deep basin.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"32 1","pages":"83 - 99"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42628538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

GIS-based landslide susceptibility mapping using frequency ratio and index of entropy models for She County of Anhui Province, China 基于GIS的安徽涉县滑坡易发性频率比和熵指数模型制图

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0122

Yu Liu, A. Yuan, Zhigang Bai, Jingzhong Zhu

{"title":"GIS-based landslide susceptibility mapping using frequency ratio and index of entropy models for She County of Anhui Province, China","authors":"Yu Liu, A. Yuan, Zhigang Bai, Jingzhong Zhu","doi":"10.1515/arh-2022-0122","DOIUrl":"https://doi.org/10.1515/arh-2022-0122","url":null,"abstract":"Abstract Landslides caused countless economic and casualty losses in China, especially in mountainous and hilly areas. Landslide susceptibility mapping is an important approach and tool for landslide disaster prevention and control. This study presents a landslide susceptibility assessment using frequency ratio (FR) and index of entropy (IOE) models within a geographical information system for She County in the mountainous region of South Anhui, China. First, the landslide locations were ascertained in the study area using historical landslide records, aerial photographs, and multiple field surveys. In all, 502 landslides were identified and randomly divided into two groups as training (70%) and validation (30%) datasets. Additionally, the landslide-influencing factors, including slope angle, slope aspect, curvature, landform, lithology, distance to faults, distance to roads, distance to rivers, rainfall, and normalized difference vegetation index, were selected and their relative importance and weights were determined by FR and IOE models. The results show that the very high and high susceptibility classes cover nearly 50% of the study area. Finally, the comprehensive performance of the two models was validated and compared using receiver operating characteristic curves. The results demonstrated that the IOE model with the area under the curve (AUC) of 0.802, which is slightly better in prediction than the FR model (AUC = 0.786). The interpretation of the susceptibility map indicated that landform, slope degree, and distance to rivers plays a major role in landslide occurrence and distribution. The research results can be used for preliminary land use planning and hazard mitigation purposes.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"32 1","pages":"22 - 33"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42405526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 5

Structure of pumpkin pectin and its effect on its technological properties 南瓜果胶的结构及其对工艺性能的影响

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2022-01-01 DOI: 10.1515/arh-2022-0124

Baississe Salima, Dridi Seloua, Fahloul Djamel, Mezdour Samir

{"title":"Structure of pumpkin pectin and its effect on its technological properties","authors":"Baississe Salima, Dridi Seloua, Fahloul Djamel, Mezdour Samir","doi":"10.1515/arh-2022-0124","DOIUrl":"https://doi.org/10.1515/arh-2022-0124","url":null,"abstract":"Abstract The aim of this work is to investigate the structural features, physicochemical, rheological, and emulsifying properties of pectin extracted from pumpkin “Cucurbita maxima” pulp and peel. After the peel and pulp of fresh pumpkin were solubilized in water at high temperature (80°C) and clarification, the obtained filtrate was treated with aluminum sulphate, which precipitates a fibrous coagulum. The results found that the major functional groups of pectin isolates identified by Fourier transform infrared are: –OH, CH2, C═C, –C–O–C–, and CH3. The results obtained using nuclear magnetic resonance methods suggest that these polysaccharides consist of two domains: the first one is homogalacturonan and the second is formed by rhamnogalacturonan. Mineral and metal ions on pectin surface detected using scanning electron microscopy coupled to energy dispersive X-ray analysis were different pulp and peel pectin. Rheological behavior of these biopolymers is suitably represented by the Herschel–Bulkley and power law models. The extracted pectin has a viscosity spectrum expressed by the following properties: G′, G′′, G*, and ∣ η ̇ ∣ ( ω ) | dot{eta }| (omega ) which, respectively, have the following values: 0.28–57.63, 0.15–34.38, 0.39–67.12, and 1.82–831.08 Pa s. These macromolecules have a negative charge on their surface. Rheological properties and emulsifying activity are significantly influenced by the structural composition and physicochemical properties. Graphical abstract","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"32 1","pages":"34 - 55"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41771658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 19

Direct Shear Test and Shear Strength Model of Clay-Filled Joints 粘土填充接缝的直剪试验及抗剪强度模型

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2021-01-01 DOI: 10.1515/arh-2020-0119

L. Chang, Yanlin Zhao, Yixian Wang, T. Tan

引用次数: 0

Flow and Yield Characteristics of Yield Stress Fluids Using Hysteresis Loop Test Below Slip Yield Point 利用滑移屈服点以下迟滞回线试验研究屈服应力流体的流动和屈服特性

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2021-01-01 DOI: 10.1515/arh-2020-0115

Yasunori Sato, Y. Sugihara, Tsutomu Takahashi

引用次数: 2