High Temperatures-high Pressures最新文献_第8页

Effect of silica particle size and filler content on the fracture properties of epoxy resin composite 二氧化硅粒径和填料含量对环氧树脂复合材料断裂性能的影响

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.999

Zafer Azem, U. Malayoğlu, B. Uyulgan

{"title":"Effect of silica particle size and filler content on the fracture properties of epoxy resin composite","authors":"Zafer Azem, U. Malayoğlu, B. Uyulgan","doi":"10.32908/hthp.v50.999","DOIUrl":"https://doi.org/10.32908/hthp.v50.999","url":null,"abstract":"Silica particles were used as a filler to produce silica-epoxy composite. Silica particles with two mean diameters of 1 μm and 37 μm and filler content of 20, 30, 40, and 60 wt. % were used to investigate the effect of particle size and filler content on the fracture behavior of epoxy resin composite, respectively. The fractural behavior of composites was characterized by linear elastic fracture mechanics according to standard of ASTM-D5045 in which three-point bending test procedure was used to investigate plane-strain fracture toughness (Kıc) and strain energy release rate (Gıc) of the composite specimens. Glass transient temperatures of the samples were evaluated by using differential scanning calorimetry (DSC). Fracture surfaces of the produced specimens were examined by SEM. The highest Young’s modulus value was 10.48 GPa for the sample produced with 37 μm particle size and 60 wt. % filler content and it was found that a considerable increase was obtained according to the 3.05 MPa values of the unfilled epoxy. Experimental results show that fracture toughness value of the silica filled epoxy composite was improved by 98% compared to unfilled epoxy.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442781","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: 0

Inter-laboratory comparison on thermal conductivity measurements by the guarded hot plate method between LNE and Institute VINČA LNE和研究所用保护热板法测量导热系数的实验室间比较VINČA

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.1001

B. Hay, N. Milošević, J. Hameury, N. Stepanić, G. Failleau, Y. Garcia, A. Koenen, J. Filtz

{"title":"Inter-laboratory comparison on thermal conductivity measurements by the guarded hot plate method between LNE and Institute VINČA","authors":"B. Hay, N. Milošević, J. Hameury, N. Stepanić, G. Failleau, Y. Garcia, A. Koenen, J. Filtz","doi":"10.32908/hthp.v50.1001","DOIUrl":"https://doi.org/10.32908/hthp.v50.1001","url":null,"abstract":"An inter-laboratory comparison has been organized between LNE and Institute VINČA, respectively French National Metrology Institute and Serbian Designated Institute for thermal properties metrology, on thermal conductivity measurements by the guarded hot plate method. The main objective was to validate the measurement capabilities of VINČA in terms of thermal conductivity in the temperature range from 10 °C to 50 °C by using the facility improved in the frame of the European project Eura-Thermal. The measurements were carried out on expanded polystyrene boards using guarded hot plate apparatuses (two-specimen GHP apparatuses) in accordance with the international standard ISO 8302. The measurement programme was defined taking into account the major characteristics of the guarded hot plate apparatuses used, such as specimen dimensions and temperature and thermal conductivity ranges. Specimens were machined by LNE from a same batch for both participants. Prior to the measurements, the homogeneity of the set of specimens, as well as the influence of a variation of density of the expanded polystyrene on the thermal conductivity measurements were studied by VINČA.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442397","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: 0

Exergy and energy analysis on coal/biomass co-gasification in supercritical water 煤/生物质在超临界水中共气化的能能分析

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.927

Jieren Luo, Qiuhui Yan, Zhao-zan Feng, M. Zhang, Yaxin Yang

{"title":"Exergy and energy analysis on coal/biomass co-gasification in supercritical water","authors":"Jieren Luo, Qiuhui Yan, Zhao-zan Feng, M. Zhang, Yaxin Yang","doi":"10.32908/hthp.v50.927","DOIUrl":"https://doi.org/10.32908/hthp.v50.927","url":null,"abstract":"Supercritical water gasification (SCWG) is a promising technology for clean and efficient utilization of carbonaceous organic materials at high temperature and pressure. Coal/biomass co-gasification in supercritical water (SCW) is a better choice for both coal and biomass to offset their disadvantages. Therefore, based on the experimental results of coal/carboxymethylcellulose (CMC, as a model compound of biomass) co-gasification in SCW by continuous flow thermal-catalytic reaction system at a reactor wall temperature of 650 �C, pressure of 25 MPa, a residence time 30 s and 0.1 wt% NaOH additive, the effects of heat transfer efficiency, heat supply methods, and CMC fraction on exergy and energy efficiency of reactor (the core device in reaction system) were investigated. The results show that energy and exergy efficiencies are in excess of 69% and 43%, respectively. The priority order of heat supply for the reactor is as follow: lower temperature heat source > higher temperature heat source > direct electricity heat supply method. The heat transfer efficiency has great influence on the energy and exergy efficiencies in terms of thermophysics. The higher CMC fraction is helpful to improve exergy efficiency.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442539","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: 3

Phononic, electronic, elastic and thermodynamic properties of ScSi under high pressure via first principles calculations 通过第一性原理计算高压下ScSi的声子、电子、弹性和热力学性质

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.939

Jinjuan Sun, Shaobo Chen, K. Yao, Ying Chen, X. Yao

引用次数: 0

Obituary: Academician Vladimir E. Fortov (1946–2020) 讣告:弗拉迪米尔·e·福托夫院士(1946-2020)

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.1171

引用次数: 0

Wetting property of liquid Pb on different steel candidates as structural materials for the Generation IV nuclear reactors 液态铅在第四代核反应堆不同候选钢结构材料上的润湿性能

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.871

D. Giuranno, S. Amore, R. Novakovic, Corrado Tomasi, E. Ricci

引用次数: 1

Thermal expansion, heat capacity and Gr�neisen parameter of grossular at high temperature and high pressure 高温高压下的热膨胀、热容和格氏参数

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.957

Chang Su, Yonggang Liu

引用次数: 1

Computational-analytical simulation of microsystems in process intensification 过程强化中微系统的计算分析模拟

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.1189

R. M. Cotta, P. C. Pontes, Adam H. R. Sousa, C. Naveira-Cotta, K. Lisboa

{"title":"Computational-analytical simulation of microsystems in process intensification","authors":"R. M. Cotta, P. C. Pontes, Adam H. R. Sousa, C. Naveira-Cotta, K. Lisboa","doi":"10.32908/hthp.v50.1189","DOIUrl":"https://doi.org/10.32908/hthp.v50.1189","url":null,"abstract":"Heat and mass transfer enhancement techniques, either passive or active, have an important role in the more general goal of process intensification in modern engineering developments. In this context, the study of transport phenomena at the nano- and micro-scales aims far beyond the plain miniaturization of devices, being mainly directed towards process efficiency improvement and lower energy and raw materials consumption. The analysis of heat and mass transfer at such scales has required the development or extension of both theoretical and experimental methodologies. In light of the inherent multiscale nature of microfluidic devices, classical fully numerical methodologies often require large refined meshes with associated costly computations. A hybrid numerical-analytical approach for the analysis of microfluidic and thermal micro-systems is here reviewed, which includes a computational-analytical integral transform method for partial differential direct problems, that, together with mixed symbolic-numerical computations, lead to robust cost-effective algorithms for micro-scale transport phenomena analysis. Examples of this hybrid approach in selected applications are then examined more closely, including micro-reactors for continuous biodiesel synthesis with multiple reactive interfaces and three-dimensional thermal micro-devices with solid-fluid thermal conjugation.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442850","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: 2

Energy bandgap variation in semiconductor compound nanomaterials 半导体化合物纳米材料的能带变化

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.861

P. Chaturvedi, M. Goyal

引用次数: 0

Volume-independent contact angle prediction 与体积无关的接触角预测

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI: 10.32908/hthp.v50.1021

N. Çobanoğlu, Alper Genc, S. Korkut, Z. H. Karadeniz, M. Buschmann

引用次数: 1