Journal of Physics and Its Applications最新文献_第2页

Fluid Flow Regimes Analysis on Drilling Fluid Circulation for Cuttings Lifting in Vertical Drilling Oil Wells 垂直钻井提岩屑过程中钻井液循环流态分析

Journal of Physics and Its Applications Pub Date : 2023-04-11 DOI: 10.14710/jpa.v5i2.17181

Isnani Agriandita, Ismanu Yudiantoro, N. Nr

{"title":"Fluid Flow Regimes Analysis on Drilling Fluid Circulation for Cuttings Lifting in Vertical Drilling Oil Wells","authors":"Isnani Agriandita, Ismanu Yudiantoro, N. Nr","doi":"10.14710/jpa.v5i2.17181","DOIUrl":"https://doi.org/10.14710/jpa.v5i2.17181","url":null,"abstract":"Fluid Flow during the circulation of the drilling fluid is an important parameter that affects the process of successful lifting of cuttings during drilling activities. Researcher analyzed the regimes of the drilling fluid flow in vertical drilling wells through the analysis of the velocity calculation of the drilling fluid in the pipeline at conditions in the Drillpipe (v DP) of 21.11791 fps and in drill collar of (v DC) is 42.98293 fps, the velocity of drilling fluid in the annulus between the Casing and the Drill pipe is 1.14993 fps, 1.373781 fps between Open Hole and Drill pipe, and 1.594947 fps between Open Hole and Drill Collar, the critical velocity of drilling fluid in the pipeline and in the annulus, Reynolds number in the pipeline is 15986.36, inside Drill Collar of 22807.21, and in the annular between the Casing and the Drill pipe is 2847.435, between Open Hole and Drill pipe 3037.264, and 2679.938 between Open Hole and Drill Collar, and the velocity at which the drill cutting drops when in the annulus in all three zones is 0.14914 fps. The results of the analysis of fluid flow that occurs are found that in the pipe there is a turbulent flow and in the annulus a laminar flow occurs. In addition, the results of the analysis of the comparison between the velocity of the drilling fluid in the annulus and greater than the velocity of descent of the cuttings show that the cuttings can be lifted by the drilling fluid successfully. This indicates that the fluid lifting process is successful.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123689767","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

Characterization of The Optical Properties of Motor Vehicle Engine Lubricants Using the Light Polarization Method 用光偏振法表征汽车发动机润滑油的光学特性

Journal of Physics and Its Applications Pub Date : 2022-11-09 DOI: 10.14710/jpa.v5i1.14345

Q. M. B. Soesanto, K. S. Firdausi, W. Winarno, Wawa Gravelia Permana Prabawa

{"title":"Characterization of The Optical Properties of Motor Vehicle Engine Lubricants Using the Light Polarization Method","authors":"Q. M. B. Soesanto, K. S. Firdausi, W. Winarno, Wawa Gravelia Permana Prabawa","doi":"10.14710/jpa.v5i1.14345","DOIUrl":"https://doi.org/10.14710/jpa.v5i1.14345","url":null,"abstract":"This paper has carried out active and non-linear optical characterizations of motor vehicle lubricants. The samples used were three two-wheeled vehicle oil with SAE labels: 10W-40, 20W-50, and 10W-30 without pre-treatment. The active optical property (natural polarization) was measured as a function of the polarizer angle without external field interference. Meanwhile, non-linear optical properties (electro-optical polarization) used changes in the polarization of light as a function of the potential difference imposed on the sample. The light sources used were a green pointer laser (532 nm) and a red pointer laser (632 nm). The results showed that the oil has active and non-linear optical properties. The natural polarization characteristic produces two polarization peaks at 30° and 60° on both wavelengths and holds to all samples. It indicates that the dimensions and shape of the molecules in all samples are identical. It is also shown by electro-optical polarization, where the change in polarization acts as a quadratic function of the potential difference with the concentric curves of the three samples, indicating identical molecules. With electro-optical polarization, the total polarization is enhanced without changing the active optical properties in the sample. It gives an advantage for developing this method as a tracer and evaluator of the molecules of other relevant materials.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122786595","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

Determination of Pediatric Patient Companion Dose at Thoracic X-Ray Examination 儿科患者胸部x线检查伴随剂量的测定

Journal of Physics and Its Applications Pub Date : 2022-10-06 DOI: 10.14710/jpa.v5i1.14011

Ega Duandini, E. Hidayanto, W. Budi

{"title":"Determination of Pediatric Patient Companion Dose at Thoracic X-Ray Examination","authors":"Ega Duandini, E. Hidayanto, W. Budi","doi":"10.14710/jpa.v5i1.14011","DOIUrl":"https://doi.org/10.14710/jpa.v5i1.14011","url":null,"abstract":"Thorax radiography examination in pediatric patients is one of the most frequent examinations because of many abnormalities that occur in the thorax and have a high probability at children's age. Pediatric patients are assisted by a companion from the adult patient's family. Calculation and measurement of the radiation dose received by the companion are very important as they are in the examination room with the patient during the imaging process. And no matter how small the radiation dose received by the companion, there will be an opportunity for stochastic effect. The Indonesian Nuclear Energy Regulatory Agency regulation Number 4 of the Year 2020 on Radiation Safety in the Use of X-Ray Machines in Diagnostic and Interventional Radiology, regulates the dose received by patient companions must be less than 5 mSv. This study aims to analyze the relationship between the exposure factor and the radiation dose received by the patient's companion. The TLDs used to measure the radiation dose was placed on the companion's chest. The radiation dose was calculated using the Klein-Nishina formula. The results show that the dose received by the companion ranged from 0.39 × 10-5 mSv to 4.64 × 10-5 mSv, which is much lower than the permissible dose.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131859886","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

Stokes' Law Approach to Slag Formation Process to Increase the Effectiveness of Cleaning Metal Liquids in Cast Iron Smelting Process 用斯托克斯定律研究渣形成过程，提高铸铁冶炼过程中金属液净化的有效性

Journal of Physics and Its Applications Pub Date : 2022-09-30 DOI: 10.14710/jpa.v5i1.14502

Muhammad Rizki Gorbyandi Nadi, C. Ruskandi, A. Siswanto, Gita Novian Hermana

{"title":"Stokes' Law Approach to Slag Formation Process to Increase the Effectiveness of Cleaning Metal Liquids in Cast Iron Smelting Process","authors":"Muhammad Rizki Gorbyandi Nadi, C. Ruskandi, A. Siswanto, Gita Novian Hermana","doi":"10.14710/jpa.v5i1.14502","DOIUrl":"https://doi.org/10.14710/jpa.v5i1.14502","url":null,"abstract":"The purpose of this study was to increase the effectiveness of slag cleaning in the cast iron smelting process using an induction furnace. This study resulted in the calculation of the terminal velocity of the slag emerging to the surface of the induction furnace based on Stokes' Law approach for each slag that appears during the cast iron smelting process. For each cast iron casting, three samples were taken based on the fastest time on the very light slag, the slag’s time for the heaviest slag, and the extreme time for comparison. The results of each sample are tested for characterization such as shape, size, and chemical composition of each sample which are then adjusted to the calculations that have been made. The characterization was analyzed using X-ray diffraction, scanning electroscope, and energy dispersive spectroscopy microanalysis. The results show that the Stokes law approach to predict the slag reaching the surface gets the appropriate result that all the slag reaches the surface at time t = 230 s. The slag that appears at time t = 300 s is the slag formed due to the interaction of the liquid with the surface which is not the slag that occurs from the raw material used. This study succeeded in minimizing the formation of slag in each casting of cast iron using an induction furnace.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"176 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114075434","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

Assessment of Measured and Calculated Dose Rate of Co-60 Teletherapy Machine: 06 Years’ Experience at NORIN Nawabshah, Pakistan Co-60远程治疗机测量和计算剂量率的评估:巴基斯坦纳瓦布沙阿NORIN公司06年的经验

Journal of Physics and Its Applications Pub Date : 2022-09-30 DOI: 10.14710/jpa.v5i1.15355

M. Waqar, T. Afridi, Q. Soomro, Muhammad Shahban

{"title":"Assessment of Measured and Calculated Dose Rate of Co-60 Teletherapy Machine: 06 Years’ Experience at NORIN Nawabshah, Pakistan","authors":"M. Waqar, T. Afridi, Q. Soomro, Muhammad Shahban","doi":"10.14710/jpa.v5i1.15355","DOIUrl":"https://doi.org/10.14710/jpa.v5i1.15355","url":null,"abstract":"It is essential to determine the absolute output dose of Co-60 source in the radiation treatment periodically. It is because overdosage may cause radiation hazards whereas under dosage may lead to the unsatisfactory treatment of cancer. The current study is focused on the consistency of monthly dose output verification of the cobalt-60 Teletherapy unit which should be within ±2% as per international standards. In the present study, the measured and calculated dose rate of the Co-60 teletherapy unit at Nuclear Medicine Oncology and Radiotherapy Institute Nawabshah (NORIN) for the last 6 years is analyzed. The dose measurement was done in water phantom 30×30×30 cm3 at 80 cm Source to Surface Distance with 5cm depth by using calibrated electrometer and PTW ionization chamber. The measured output dose rate obtained by actual dosimetry is within ±2% of the dose rate calculated by the decay method and the deviation lies within the permissible limit as prescribed by International Atomic Energy Agency (IAEA), International Commission on Radiological Units and Measurement (ICRUM)and American Association of Physicists in Medicine (AAPM). The variation in measurements obtained is within the tolerable limits according to standard protocols and codes. Thus, our study shows a homogenous trend in the dose rate of the Co-60 teletherapy machine.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"6 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120833534","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

Depicting the Underground River Systems in Karst Mountains of Buayan and Ayah Subdistricts Using GGMPlus Data and Springs Distribution 利用GGMPlus数据和泉水分布描绘布亚延、阿亚街道喀斯特山区地下河系统

Journal of Physics and Its Applications Pub Date : 2022-09-09 DOI: 10.14710/jpa.v5i1.13210

Agung Wibawa, Siti Fauzatun

引用次数: 0

Effect of Yield Silver Nanoparticles in Enhancing Raman Signal of SERS Substrate Fabricated on Whatman Filter Paper 产率银纳米粒子对增强Whatman滤纸SERS衬底拉曼信号的影响

Journal of Physics and Its Applications Pub Date : 2022-04-24 DOI: 10.14710/jpa.v4i2.13226

A. Hidayah, Y. Herbani, D. Triyono, R. Saleh

引用次数: 0

Magnetic Susceptibility of Volcanic Rocks from Pahae Julu Region, North Sumatera Province 北苏门答腊省渤海巨鹿地区火山岩磁化率研究

Journal of Physics and Its Applications Pub Date : 2022-04-16 DOI: 10.14710/jpa.v4i2.13597

N. Siregar, H. Rifai, S. Syafriani, A. Fauzi, F. Mufit

{"title":"Magnetic Susceptibility of Volcanic Rocks from Pahae Julu Region, North Sumatera Province","authors":"N. Siregar, H. Rifai, S. Syafriani, A. Fauzi, F. Mufit","doi":"10.14710/jpa.v4i2.13597","DOIUrl":"https://doi.org/10.14710/jpa.v4i2.13597","url":null,"abstract":"Pahae Julu is a sub-district located in North Tapanuli Regency, North Sumatra. This area is often found with volcanic material from the eruption of Mount Toba (Youngest Toba Tuff). The Youngest Toba Tuff eruption occurred ~74,000 years ago with a volume of 2,800 km3. When there is an eruption, the lava on the earth's surface undergoes a relatively fast freezing process to form volcanic igneous rock. These rocks contain various minerals, one of which is magnetic minerals that can be used as a track record of volcanic processes from Mount Toba. However, no document records the magnetic susceptibility value of the Youngest Toba Tuff volcanic rock in the Pahae Julu area. This research aimsbfor knowing the abundance of magnetic minerals by the low-field magnetic susceptibility. To achieve this goal, the rock magnetism method is used. This way is very effective, cheap, sensitive, and non-destructive. Magnetic susceptibility measurements are done using the Bartington Magnetic Susceptibility Meter MS2B sensor. Rock samples analyzed are pumice which is the result of the Youngest Toba Tuff eruption. The results showed that the magnetic susceptibility value obtained for the sample was between 85.0 x 10-8m3/kg – 183.1 x 10-8m3/kg with an average of 119.78 x 10-8m3/kg. Based on this value, it is assumed that the magnetic mineral properties are Antiferromagnetic. The average value of χ fd% obtained is 0.95%, indicating that the Youngest Toba Tuff volcanic rock in the Pahae Julu area has almost no Superparamagnetic grains.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"8 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123736398","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

The Mass Distribution of Soputan Volcano Based on Gravity Data 基于重力资料的索普坦火山质量分布

Journal of Physics and Its Applications Pub Date : 2022-04-16 DOI: 10.14710/jpa.v4i2.13230

Dave Emmanuel Haning, A. Setyawan, R. Indriana

引用次数: 0

FOPDT Model Based on Experimental Data from Municipal Solid Waste Incineration Process Temperature Control in Fixed Bed 基于固定床焚烧过程温度控制实验数据的FOPDT模型

Journal of Physics and Its Applications Pub Date : 2022-02-21 DOI: 10.14710/jpa.v4i2.12442

A. Khuriati

引用次数: 1