Journal of Engineering Science最新文献_第10页

Numerical Simulation of Dendrite Motion Fidelity Based on the Interface Capture Method 基于界面捕获法的枝晶运动保真度数值模拟

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.1155/2023/9615648

Bing Zhang, Shenmin Zhang, Yu Zhang, Siyu Zhang, Bao-Tian Zhu, Ri Li

{"title":"Numerical Simulation of Dendrite Motion Fidelity Based on the Interface Capture Method","authors":"Bing Zhang, Shenmin Zhang, Yu Zhang, Siyu Zhang, Bao-Tian Zhu, Ri Li","doi":"10.1155/2023/9615648","DOIUrl":"https://doi.org/10.1155/2023/9615648","url":null,"abstract":"During alloy solidification, many free grains in the melt have important effects on the final microstructure and composition distributions. In this paper, grain motion is calculated based on an interface tracking method coupled with a cellular automata (CA) method. First, the interface tracking capabilities of the level set, simple linear interface calculation (SLIC), and piecewise linear interface calculation (PLIC) methods are compared, and the fidelity of the three models is explored. Then, the coupling degrees of these three models with the CA method are analyzed. Finally, the PLIC method is used to simulate various behaviors of grain movement and to verify the authenticity of the dendrite motion calculation. The simulation results show that the VOF methods more readily coupled with the CA model than the level set method, and it is more suitable for calculating the motion behaviors of dendrites. Among the VOF methods, the interface reconstructed by the SLIC method is relatively rough and can only calculate objects with simple morphologies. The PLIC method has a fine interface and small error in the calculation of dendrite movement, and it does not significantly impact the subsequent calculations.","PeriodicalId":52570,"journal":{"name":"Journal of Engineering Science","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79171559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of Corrosion Rate Under Two Phase Flow in Horizontal Pipe Using Neural Network 基于神经网络的水平管道两相流腐蚀速率建模

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2012.07.10

Y. K. Yousif, Fadhil Sarhan

{"title":"Modeling of Corrosion Rate Under Two Phase Flow in Horizontal Pipe Using Neural Network","authors":"Y. K. Yousif, Fadhil Sarhan","doi":"10.31026/j.eng.2012.07.10","DOIUrl":"https://doi.org/10.31026/j.eng.2012.07.10","url":null,"abstract":"The present study develops an artificial neural network (ANN) to model an analysis and a simulation of the correlation between the average corrosion rate carbon steel and the effective parameter Reynolds number (Re), water concentration (Wc) % temperature (T o) with constant of PH 7 . The water, produced fom oil in Kirkuk oil field in Iraq from well no. k184-Depth2200ft., has been used as a corrosive media and specimen area (400 mm2) for the materials that were used as low carbon steel pipe. The pipes are supplied by Doura Refinery . The used flow system is all made of Q.V.F glass, and the circulation of the two –phase (liquid – liquid ) is affected using a Q.V.F pump .The input parameters of the model consists of Reynolds number , water concentration and temperature. The output is average corrosion rate .The performance of the two training algorithms, gradient descent with momentum and Levenberg-Marquardt, are compared to select the most suitable training algorithm for corrosion rate model. The model can be used to calculate the average corrosion rate properties of carbon steel alloy as functions of Reynolds number, water concentration and temperature. Accordingly, the combined influence of these effective parameters and the average corrosion rate is simulated. The results show that the corrosion rate increases with the increase of temperature, Reynolds number and the increase of water concentration.","PeriodicalId":52570,"journal":{"name":"Journal of Engineering Science","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85645909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of an Integrated Construction Management System for Building Estimation 建筑估价综合施工管理系统的开发

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2012.09.02

S. Mohammed, Ehab Ali

{"title":"Development of an Integrated Construction Management System for Building Estimation","authors":"S. Mohammed, Ehab Ali","doi":"10.31026/j.eng.2012.09.02","DOIUrl":"https://doi.org/10.31026/j.eng.2012.09.02","url":null,"abstract":"Project management are still depending on manual exchange of information based on paper documents. Where design drawings drafting by computer-aided design (CAD), but the data needed by project management software can not be extracted directly from CAD, and must be manually entered by the user. The process of calculation and collection of information from drawings and enter in the project management software needs effort and time with the possibility of errors in the transfer and enter of information. This research presents an integrated computer system for building projects where the extraction and import quantities, through the interpretation of AutoCAD drawing with MS Access database of unit costs and productivities for the pricing and duration of tasks, then exported to MS Project and MS Excel. The system was developed by using Visual Basic and ActiveX automation technology for combining the above software. The system, also, can calculate quantities of materials. The system includes digitizer (on-screen takeoff) calculates the lengths and areas of the drawings to which the form of an image and scanned. The integrated system has been applied to case study, a storages building for hospital 260 beds. The results proved the effectiveness of the system for the conversion of information from the graphical form dwg to numerical formulas xlcx / xlc and mpp can be handled easily pleased and software are covered.","PeriodicalId":52570,"journal":{"name":"Journal of Engineering Science","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81320967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Corrosion-Resistance Characteristics of Concrete Containing Furfural 含糠醛混凝土的耐腐蚀性能

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2012.04.08

S. Al-Hubboubi, Zain Al-Abideen Raouf, Ra' id Hasan Abbood

引用次数: 1

Simulation of Heat Storage and Heat Regeneration in Phase Change Material 相变材料蓄热与热再生的模拟

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2012.09.06

K. A. Joudi, Ahmed Kasim Taha

引用次数: 3

EXPERIMENTAL AND NUMERICAL STRESS ANALYSIS OF INVOLUTE SPLINED SHAFT 渐开线花键轴的实验与数值应力分析

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2012.04.03

M. H. Faidh-Allah, Zainab Amjed, Abdul Khalik

引用次数: 1

A Modified 2D-Checksum Error Detecting Method for Data Transmission in Noisy Media 噪声介质中数据传输的改进二维校验和错误检测方法

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2013.08.05

A. Hoori

{"title":"A Modified 2D-Checksum Error Detecting Method for Data Transmission in Noisy Media","authors":"A. Hoori","doi":"10.31026/j.eng.2013.08.05","DOIUrl":"https://doi.org/10.31026/j.eng.2013.08.05","url":null,"abstract":"In data transmission a change in single bit in the received data may lead to miss understanding or a disaster. Each bit in the sent information has high priority especially with information such as the address of the receiver. The importance of error detection with each single change is a key issue in data transmission field.The ordinary single parity detection method can detect odd number of errors efficiently, but fails with even number of errors. Other detection methods such as two-dimensional and checksum showed better results and failed to cope with the increasing number of errors.Two novel methods were suggested to detect the binary bit change errors when transmitting data in a noisy media.Those methods were: 2D-Checksum method and Modified 2D-Checksum. In 2D-checksum method, summing process was done for 7×7 patterns in row direction and then in column direction to result 8×8 patterns. While in modified method, an additional parity diagonal vector was added to the pattern to be 8×9. By combining the benefits of using single parity (detecting odd number of error bits) and the benefits of checksum (reducing the effect of 4-bit errors) and combining them in 2D shape, the detection process was improved. By contaminating any sample of data with up to 33% of noise (change 0 to 1 and vice versa), the detecting process in first method was improved by approximately 50% compared to the ordinary traditional two dimensional-parity method and gives best detection results in second novel method ","PeriodicalId":52570,"journal":{"name":"Journal of Engineering Science","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78672146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laminar Free Convection In Horizontal Annulus Filled With Glass Beads And With Annular Fins On The Inner Cylinder 层流自由对流在玻璃微珠填充的水平环空和内柱上的环形翅片

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2013.08.06

M. Saleh, Ahmed Mohsen Katea

{"title":"Laminar Free Convection In Horizontal Annulus Filled With Glass Beads And With Annular Fins On The Inner Cylinder","authors":"M. Saleh, Ahmed Mohsen Katea","doi":"10.31026/j.eng.2013.08.06","DOIUrl":"https://doi.org/10.31026/j.eng.2013.08.06","url":null,"abstract":"An experimental and numerical study has been carried out to investigate the heat transfer by natural convection and radiation in a two dimensional annulus enclosure filled with porous media (glass beads) between two horizontal concentric cylinders. The outer cylinders are of (100, 82 and70mm) outside diameters and the inner cylinder of 27 mm outside diameter with (or without) annular fins attached to it. Under steady state condition; the inner cylinder surface is maintained at a high temperature by applying a uniform heat flux and the outer cylinder surface at a low temperature inside a freezer. The experiments were carried out for an annulus filled with glass beads at a range of modified Rayleigh number (4.9 ≤ Ra≤ 69), radiation parameter (0<Rd<10), with fin length of (Hf=3, 7 and 11mm), with radius ratios of (Rr=(r1/r2) =0.1405,0.2045, 0.293 and 0.3649 ), number of fins (n=0, 12, 23 and 45). Finite difference method with Boussinesq's approximation is used to solve the continuity, energy and momentum equations. The numerical solution is capable of calculating the streamline, the temperature field, the velocity field, the local and average Nusselt number. A computer program in Mat lab has been built to carry out the numerical solution. The numerical study was done for a range of modified Rayleigh number (4.9 ≤ Ra ≤ 300). Results show that the average Nusselt number is nearly constant for Ra less than 100 and increased with an increase in modified Rayleigh number.Nusselt number hardly affected by glass beads size and insignificant affected by Rd for Ra less than 100. Decreasing Rr cause clearly increase in average Nusselt number and increasing fin length or fin number decrease heat transfer.","PeriodicalId":52570,"journal":{"name":"Journal of Engineering Science","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78747564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Study of AODV, GRP and OSPFv3 MANET Routing Protocols Using OPNET Modeler 基于OPNET Modeler的AODV、GRP和OSPFv3 MANET路由协议性能研究

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2013.08.09

Sabbar Insaif Jassim

{"title":"Performance Study of AODV, GRP and OSPFv3 MANET Routing Protocols Using OPNET Modeler","authors":"Sabbar Insaif Jassim","doi":"10.31026/j.eng.2013.08.09","DOIUrl":"https://doi.org/10.31026/j.eng.2013.08.09","url":null,"abstract":"A Mobile Ad hoc Network (MANET) is a collection of mobile nodes, that forms on the fly a temporary wireless multi-hop network in a self-organizing way, without relying on any established infrastructure. In MANET, a pair of nodes exchange messages either over a direct wireless link, or over a sequence of wireless links including one or more intermediate nodes. For this purpose, an efficient routing protocol is required. This paper introduced performance study of three of MANET protocols (AODV, GRP and OSPFv3). This study was one of the newer studies because wireless communication played an important role in today’s application and the field of mobile ad hoc network becomes very popular for the researchers in the last years. This study was done using OPNET Modeler v14.5 and the comparison between the protocols was done in terms of throughput, routing traffic received, traffic sent, load and delay with increased number of mobile nodes from 10, 25 and 50 mobile nodes. The results showed that AODV (reactive routing protocol) was better in delay and had smaller load and smaller throughput than GRP (reactive and proactive routing protocols) and OSPFv3 (proactive routing protocols).","PeriodicalId":52570,"journal":{"name":"Journal of Engineering Science","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73332744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Fire Flame (High Temperature) on the Behaviour of Axially loaded Reinforced SCC Short Columns 火焰(高温)对轴向加载钢筋混凝土短柱性能的影响

Journal of Engineering Science Pub Date : 2023-07-21 DOI: 10.31026/j.eng.2012.08.03

A. Izzat

{"title":"Effect of Fire Flame (High Temperature) on the Behaviour of Axially loaded Reinforced SCC Short Columns","authors":"A. Izzat","doi":"10.31026/j.eng.2012.08.03","DOIUrl":"https://doi.org/10.31026/j.eng.2012.08.03","url":null,"abstract":"Experimental research was carried out to investigate the effect of fire flame (high temperature) on specimens of short columns manufactured using SCC (Self compacted concrete). To simulate the real practical fire disasters, the specimens were exposed to high temperature flame, using furnace manufactured for this purpose. The column specimens were cooled in two ways. In the first the specimens were left in the air and suddenly cooled using water, after that the specimens were loaded to study the effect of degree of temperature, steel reinforcement ratio and cooling rate, on the load carrying capacity of the reinforced concrete column specimens. The results will be compared with behaviour of columns without burning (control specimens). The results showed that, the ultimate load capacity of columns exposed to fire decreases with increasing the fire flame temperature. At burning temperature 300 Co , 500 Co and 700 Co , the average residual ultimate load capacity for gradually cooled specimens were 91%, 81% and 71% respectively. By increasing the ratio of longitudinal reinforcement 44% , the maximum improvement in the ultimate load capacity was 24% and 17% for the gradually and sudden cooling respectively at Co 500 . For the same longitudinal reinforcement ratio and fire burning temperature, the ultimate capacity for the sudden cooling specimens was less than that of gradually cooled specimens by about 10%.","PeriodicalId":52570,"journal":{"name":"Journal of Engineering Science","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85052964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2