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Experimentation on Optimal Configuration and Size of Thin Cylinders in Natural Convection

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Semiconductor Science and Information Devices 2022年第2期4卷 17-28页

作者： Ali riaz Adnan Ibrahim Muhammad Sohail Bashir Masroor Asghar Muhammad Abdullah Ajmal Shah Department of Mechanical Engineering Pakistan Institute of Engineering and Applied SciencesIslamabad45650Pakistan School of Engineering Science University of Science and Technology of ChinaHefei230027China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China Department of Information Technology University of Southern QueenslandToowoomba4350QueenslandAustralia

In this paper,an experimental study of laminar,steady state natural convection heat transfer from heated thin cylinders in an infinite air medium has been *** electrically heated cylinders having the same slenderness ratio(L/D)i.e.6.1 but different diameters i.e.3.8 cm and 5.08 cm were used.105 experiments were carried out to study the effect of diameter and inclination angle of thin cylinder on natural convection heat *** mandatory corrections of radiation and endcap heat losses,convective heat transfer results were presented in the form of local and average dimensionless *** vertical configuration of thin cylinder,Nusselt number was varied from 52.99 to 95.10 corresponding to 1.28×10^(8)≤Ra*L≤1.08×10^(10).While for horizontal configuration,Nusselt number was varied from 10.74 to 17.78 corresponding to 9.42×10^(4)≤Ra*D≤8.17×10^(6).Results were compared with the published data and found satisfactory as the maximum percentage difference was only 3.09%.The essence of research is that the heat transfer coefficient increases with decrease in diameter and increase in inclination *** flow visualization was done to capture patterns of fluid ***,comparison was made to quantify increase in Nusselt number from slender cylinder as compared to the flat plate.

关键词： Natural convection Thin cylinders Flat plate Nusselt number

Convection Heat Transfer from Heated Thin Cylinders Inside a Ventilated Enclosure

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Semiconductor Science and Information Devices 2022年第2期4卷 10-16页

作者： Ali riaz Adnan Ibrahim Muhammad Sohail Bashir Muhammad Abdullah Ajmal Shah Abdul Quddus Department of Mechanical Engineering Pakistan Institute of Engineering and Applied SciencesIslamabad45650Pakistan School of Engineering Science University of Science and Technology of ChinaHefeiAnhui230027China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China

Experimental study was conducted to determine the effect of velocity of axial fan,outlet vent height,position,area,and aspect ratio(h/w)of ventilated enclosure on convection heat *** wooden ventilated enclosure having top and front transparent wall was made up of Perspex for visualization,and internal physical dimensions of box were 200 mm×200 mm×400 *** vent was at bottom while outlet vents were at the side and top *** heated cylindrical heat source having 6.1 slenderness ratio was fabricated and hanged at the centre of the *** calculate heat transfer rates,thermocouples were attached to the inner surface of heat source with silica *** source was operated at constant heat flux in order to quantify the effect of velocity of air on heat *** was observed that average Nusselt number was increased from 68 to 216 by changing velocity from 0 to 3.34 m/s at constant modified Grashof number i.e.5.67E+*** variation in outlet height at the front wall did not affect heat transfer in forced convection ***,Nusselt number decreased to 5%by changing the outlet position from top to the front wall or by 50%reduction in outlet area during forced *** rise in temperature of enclosure increased from 8.19 K to 9.40 K by increasing aspect ratio of enclosure from 1.5 to 2 by operating heat source at constant heat flux i.e.541.20 w/m^(2).

关键词： Experimentation Ventilated enclosures Convection heat transfer Dimensionless data

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煤层天然气的开采

国外测井技术 2005年第2期20卷 43-60页

作者： John Anderson Leif Colson Mike Simpson Tom Olsen Paul Basinski Zachariah John Andrew Beaton riaz Khan Charles Boyer Daren Bulat Satyaki Ray Don Reinheimer Greg Schlachter Nexen 加拿大有限公司加拿大艾伯塔省卡尔加里 El Paso 开采公司美国得克萨斯州休斯敦艾伯塔省地质调查局艾伯塔省埃德蒙顿

煤层中的天然气是一种很重要的资源，可以帮助缓解全球不断增长的能源需求。在许多地区，市场条件以及相应技术的进展已经使得开采这一资源成为一种可行的方法。煤层储藏具有独特的特点，在建井、地层评价、完井和压裂液、模拟以及储藏... 详细信息

煤层中的天然气是一种很重要的资源，可以帮助缓解全球不断增长的能源需求。在许多地区，市场条件以及相应技术的进展已经使得开采这一资源成为一种可行的方法。煤层储藏具有独特的特点，在建井、地层评价、完井和压裂液、模拟以及储藏开发等方面都需要采用新的方法。

关键词：天然气煤层开采能源需求市场条件地层评价压裂液资源储藏完井

Prophet Muhammad (pbuh) Practices to Establish a Pluralistic Society: Study of Madīnah Charter in Contemporary Global Context

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Cultural and Religious Studies 2018年第9期6卷 548-560页

作者： riaz Ahmad Saeed Sumayyah Rafique Naseem Akhter Zahid Lateef Abu Bakar Bhutta Hafiz Muhammad Naeem The National University of Modern Languages (NUML) Islamabad Pakistan Shaheed Benazir Bhutto Women University Peshawar Pakistan University of Engineering & Technology Lahore Pakistan National University of Modern Languages( NUML) Islamabad Pakistan Governmnet College University Lahore Pakistan

This study explores the practices of the Holy Prophet Muhammad ■ to establish a peaceful and diverse society with special reference to Methāq-e-Madīnah and its significance and application in contemporary socio-political context. Theoretically, the effort and dream to establish a peaceful and diverse society have been a matter of concern for the humanity from the ancient times. But it has become the most significant and burning issue of the contemporary global scenario. Ultimately, the human intellectual and physical development is based upon peace and peaceful coexistence. Therefore, a number of religious and socio-political scholars have been tried to establish a peaceful and diverse society in different phases of the human history. Practically, the Prophet Muhammad (■ )has made a unique and distinct contribution towards developing a peaceful and diverse society for 1,400 years ago, though he led or had been the part of multiethnic society of different faiths in the state of Madīnah. In order to establish a peaceful and pleasant relationship between Muslims and other communities of Madīnah, an agreement was signed which was titled Methāq-e-Madīnah. The Charter of Madīnah contained certain principles and regulations that are mandatory for a peaceful living in a diverse state or society. This charter is an excellent model for peace, prosperity, religious freedom, and human rights in the human history. According to this charter, all groups were free to exercise their religious beliefs and social and economic interests. According to this agreement, Madīnah was declared a federal capital of the state. This agreement had provided equal rights, religious autonomy, and socio-cultural freedom to all other groups of the Madīnah (Jews, Christians, and polytheists). Therefore, it is perceived that the Charter of Madīnah may become a preamble for peaceful coexistence in this multicultural and multipath world of the contemporary era. In this study, analytical research methodolo

关键词： prophet approach peaceful and diverse society Methāq-e-Madīnah modern era

根据与序列有关的扩增多态性研究甘蓝型油菜自交系的遗传多样性及多样性与杂交种表现的关系

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国外作物育种 2002年第6期21卷 42-42页

作者： A.riaz 邱敦莲等

肝细胞肝癌的化疗栓塞:对172例病人的各种综合影像和生存期的分析

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国际医学放射学杂志 2010年第4期 390-390页

作者： R.J.Lewandowski M.F.Mulcahy L.M.Kulik A.riaz R.K.Ryu T.B.Baker 庞国栋 Dept of Radiology Section of Interventional RadiologyRobert H.Lurie Comprehensive Cancer CtrNorthwestern Memorial Hosp676 N St Clair StSuite 800ChicagoIL 60611USA

目的肝细胞肝癌化疗栓塞后,分析相关的影像和长期生存结果之间的关系。材料与方法该172例肝细胞肝癌病人化疗栓塞的研究经过机构审查委员会的批准,符合HIPAA要求。获得早

关键词：肝细胞肝癌化疗栓塞病人生存期