Thermal Science最新文献_第2页

Investigation of velocity distribution in channels and chambers of the electrostatic precipitator at TPP Nikola Tesla Unit A1 TPP尼古拉特斯拉A1单元静电除尘器通道和室内速度分布的研究

4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230816244m

Zoran Markovic, Milic Eric, Predrag Stefanovic, Ivan Lazovic, Aleksandar Milicevic, Marko Mancic, Milica Jovcevski, Rastko Jovanovic

引用次数: 0

Corrigendum: Marangoni convection of nanofluid in a wavy trapezoidal enclosure 勘误:波纹梯形外壳中纳米流体的马兰戈尼对流

4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230918192e

E Editorial

{"title":"Corrigendum: Marangoni convection of nanofluid in a wavy trapezoidal enclosure","authors":"E Editorial","doi":"10.2298/tsci230918192e","DOIUrl":"https://doi.org/10.2298/tsci230918192e","url":null,"abstract":"Simeon Oka, Editor-in-Chief Emeritus of the journal Thermal Science request that it is, due to request of the Corresponding author of this paper, necessary to correct Acknowledgement of the paper MARANGONI CONVECTION OF NANOFLUID IN A WAVY TRAPEZOIDAL ENCLOSURE written by Sharifah Nuriza Binti Syed Muhammad Naquib AL?AIDRUSa, Zailan Bin SIRIa*, and Mohd Nashrul Bin Mohd ZUBIRb a Institute of Mathematical Sciences, University Malaya, Kuala Lumpur, Malaysia b Department of Mechanical Engineering, University Malaya, Kuala Lumpur, Malaysia Original scientific paper https://doi.org/10.2298/TSCI21S2339A published in the journal Thermal Science, Vol. 25, Year 2021, Special issue 2, pp. S339-S345 since due to change regulations accepted by Government of Malaysia Condolement should have different and more detailed form. Instead of: ACKNOWLEDGEMENT This paper is part of a research project supported by the Malaysian Ministry of Higher Education Fundamental Research Grant no. FP068-2020. The authors would also like to express their thanks to the University of Malaya for supporting this research under grant no. IIRG006C19IISS. has to be written: Acknowledgment The work is supported financially by the Ministry of Higher Education Malaysia via Fundamental Research Grant Scheme (FRGS/1/2020/STG06/UM/02/4) and Impact Oriented Interdisciplinary Research Grant No. IIRG006C-19IISS. Link to the corrected article <a href=\"http://dx.doi.org/10.2298/TSCI21S2339A\">10.2298/TSCI21S2339A</a>","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135556369","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}

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Thermal recovery test for determining the thermal conductivity of the soil 测定土壤导热性的热恢复试验

4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230825223v

Marija Vasilev, Milos Banjac

引用次数: 0

Study on the effect of width and slope of large cross-section tunnel on critical velocity of fire 大断面隧道宽度和坡度对临界火速的影响研究

4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230328195s

Su Liu

引用次数: 0

Experimental and numerical investigation of Rayleigh-Bénard convection in rectangular cavity with motor oil 加机油的矩形腔内瑞利-巴程纳德对流的实验与数值研究

4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230607216z

Predrag Zivkovic, Mladen Tomic, Sadoon Ayed, Cristian Barz, Drago Sever

引用次数: 0

Cattaneo-Christov heat flux effect on Sakiadis MHD boundary layer transport phenomena in the Jeffrey fluid Cattaneo-Christov热通量对Jeffrey流体中sakadiis MHD边界层输运现象的影响

4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci221013214o

Zarith Othman, Zailan Siri, Muhamad Aziz, Kohilavani Naganthran

{"title":"Cattaneo-Christov heat flux effect on Sakiadis MHD boundary layer transport phenomena in the Jeffrey fluid","authors":"Zarith Othman, Zailan Siri, Muhamad Aziz, Kohilavani Naganthran","doi":"10.2298/tsci221013214o","DOIUrl":"https://doi.org/10.2298/tsci221013214o","url":null,"abstract":"This study aims to perform a numerical simulation of the boundary flow with the characteristic Sakiadis flow of the magnetohydrodynamic (MHD) Jeffrey fluid under the Cattaneo-Christov heat flux model over the horizontal plate. The similarity transformation for the local similarity solution was used to reduce the set of governing equations to non-linear ordinary differential equations. The equations were solved by using ?dsolve? command with the numeric option for the boundary value problem in Maple. Simulations have been carried out for different values of the relaxation to retardation times, the Deborah number, the magnetic field parameter, the heat flux relaxation time, the Prandtl number, and the Schmidt parameter. A comparative study of the numerical results from the previously published paper with the present result for the dimensionless velocity gradient over the horizontal plate shows excellent agreement. It has been found that the growth of the Deborah number leads to the dimensionless velocity gradient enhancement, while the increment of the relaxation to retardation times parameter and the magnetic field parameter indicates the opposite trend. The heat transfer rate noticeably decreased with an increment in the Prandtl number and thermal relaxation time at the fluid regime. Also, fluid concentration decreases with larger values of the Schmidt parameter.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136005808","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

Effect of internally mounted helical fins on the separation performance of a cylindrical gas-solid cyclone separator 内装螺旋翅片对圆柱形气固旋风分离器分离性能的影响

4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230527204f

Zeming Fu, Huagen Wu, Baohua Gao, Mengtao Liang, Guanghua Wu, Shuo Shang, Xin Zhang, Hongye Huang, Siwei Chen

{"title":"Effect of internally mounted helical fins on the separation performance of a cylindrical gas-solid cyclone separator","authors":"Zeming Fu, Huagen Wu, Baohua Gao, Mengtao Liang, Guanghua Wu, Shuo Shang, Xin Zhang, Hongye Huang, Siwei Chen","doi":"10.2298/tsci230527204f","DOIUrl":"https://doi.org/10.2298/tsci230527204f","url":null,"abstract":"In this study, an innovation was made by adding helical fins on the vortex finder of a cylindrical gas-solid cyclone separator, and the effect of this structural improvement on the separation performance was analyzed based on the flow field characteristics. The results show that both cyclones with and without helical fins exhibit a separation efficiency of almost 100 % for particles larger than 5 ?m. As the inlet velocity increases, the effect of adding helical fins on the overall separation efficiency decreases, with a relative deviation of only 0.16 % at an inlet velocity of 27 m/s, while it becomes increasingly effective in reducing energy consumption, with a pressure drop of 25.33 %. The mechanism of the overall performance improvement lies in the fact that the helical fins change the flow field distribution in the cyclone, where the turbulence intensity in the vortex finder is significantly reduced, the tangential velocity of the external vortex is decreased, and the pressure gradient is reduced. The purpose of this paper is to provide new ideas for the optimal design of the internal components of the cyclone separator.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136006063","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

A variational principle for fractal Klein-Gordon equation 分形Klein-Gordon方程的变分原理

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2303803c

Qiaoling Chen

引用次数: 0

Assessment of detected in situ and modeled PM10/2.5 concentration levels during the urban transformation process in Novi Sad, Serbia 塞尔维亚诺维萨德城市转型过程中原位检测和模拟PM10/2.5浓度水平的评估

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220215108s

Miljan Sunjevic, D. Reba, V. Rajs, B. Vujic, Milovan Ninkov, M. Vojinovic-Miloradov

{"title":"Assessment of detected in situ and modeled PM10/2.5 concentration levels during the urban transformation process in Novi Sad, Serbia","authors":"Miljan Sunjevic, D. Reba, V. Rajs, B. Vujic, Milovan Ninkov, M. Vojinovic-Miloradov","doi":"10.2298/tsci220215108s","DOIUrl":"https://doi.org/10.2298/tsci220215108s","url":null,"abstract":"Ambient air pollution is a very considerable and complex physicochemical and environmental issue. Particulate matter - PM is one of the fundamental pollutants constituted in ambient air. Rapidly expanding urban transformations in city of Novi Sad, Serbia, produces high concentrations of PM. The vast and growing number of construction sites as pollution emission hotspots induce constant nuisance for the people, build surrounding and environment in total. Serbian legislation has set PM pollution limit values for daily emissions, but the Air Pollutant Registry still doesn?t recognize construction sites as severe sources of PM emergence. Understanding the importance and the effects of PM emission from construction sites is crucial in environmental preservation. For the preparation and application of methods and techniques for prevention and mitigation, suitable environmental pollution modeling needs to be achieved. The aim of the research is to assess and determine the utility of Tier 1 prediction model designed by EPA and environmental modeling software ADMS - URBAN on observed construction sites in Novi Sad, Serbia. Assessing monitoring data confirms construction sites as significant PM 10 and PM2.5 pollution sources. Two sets of correction coefficients were calculated for PM10 and PM2.5, using average and median values, 2.56 - 2.54 and 1.03 - 0.97 respectively. The research study was for the first time conducted in Novi Sad, Serbia in the case of construction sites.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68236762","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

The role of microclimate in the formation of indoor air pollution 小气候在室内空气污染形成中的作用

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220215105k

Oskars Kalva

{"title":"The role of microclimate in the formation of indoor air pollution","authors":"Oskars Kalva","doi":"10.2298/tsci220215105k","DOIUrl":"https://doi.org/10.2298/tsci220215105k","url":null,"abstract":"Indoor air quality plays a key role in assessing people's quality of life, as a large proportion of people spend up to 22 hours a day indoors and people are exposed to indoor air almost all day long [1]. People in developed countries spend much more time indoors. Recently, employers are paying more and more attention to ensuring the well - being of employees, as it affects the quality and productivity of their work [2, 3]. Ensuring an appropriate working environment on the part of employers ensures both sustainable social and economic links. Well-being can be affected by various parameters of the indoor environment, in addition to the microclimate, they can be - lighting, noise level, various odors. However, one of the primary indicators of comfort or discomfort in an indoor environment is thermal comfort or discomfort [4]. Gas stations were chosen as place for measurements because they are considered dangerous for several reasons: gas station territory is potentially hazardous with a high environmental risk and explosion hazard. Working shifts and nights is also considered undesirable for human health as it disrupts the biological rhythms in the human body [5]. In such circumstances, the indoor microclimate and air parameters play a very important role, as spending long hours in inappropriate microclimatic conditions is likely to lead to various long - term health problems for the workers.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68237204","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