International Journal of Mathematics and Physics最新文献_第8页

Study of the natural radioactivity of ore deposits 矿床天然放射性研究

International Journal of Mathematics and Physics Pub Date : 2021-12-01 DOI: 10.26577/ijmph.2021.v12.i2.011

V. Dyachkov, Y. Zaripova, M.G. Ahmadieva, M. T. Bigeldiyeva, A. Yushkov

引用次数: 0

Numerical modeling of air flow inside the human nose cavity 人鼻腔内气流的数值模拟

International Journal of Mathematics and Physics Pub Date : 2021-06-28 DOI: 10.26577/ijmph.2021.v12.i1.05

A. K. Manapova, A. Issakhov

{"title":"Numerical modeling of air flow inside the human nose cavity","authors":"A. K. Manapova, A. Issakhov","doi":"10.26577/ijmph.2021.v12.i1.05","DOIUrl":"https://doi.org/10.26577/ijmph.2021.v12.i1.05","url":null,"abstract":"The complex structure of the human nasal cavity makes it difficult to study the flow of air in it, therefore, at present, mathematical and computer modeling is used for this purpose. These studies are relevant due to the development of inhalation methods for introducing drugs into the nose, with the help of which operations can be performed. Within the framework of the Navier-Stokes system of equations, temperature and concentration using the ANSYS Fluent application, a three-dimensional test calculation of the air flow in the human nasal cavity was carried out at various modes of inhalation, normal and during exercise. A laminar model was used to close the Navier-Stokes equations, and the SIMPLE method was used to perform the relationship between velocity and pressure. In the graphics package AutoCAD, a geometric three-dimensional model of the nasal cavity was built, reconstructed from images of the nose in coronary sections. As a result of numerical simulation, the fields of velocity, pressure, temperature and concentration were obtained. The results obtained were compared with the experimental data from [10] and the numerical results from [3]. The analysis of these results in terms of the influence of the structure of the nasal cavity on the structure of the flow. The results obtained agree with the experimental data. It was found that the inhaled air is heated and humidified to the state of the nasal tissue, the shells increase the rate of local transfer of heat and moisture by improving mixing and maintaining thin boundary layers, the capacity of a healthy nose exceeds the requirements necessary for conditioning the inhaled air under normal breathing conditions.","PeriodicalId":40756,"journal":{"name":"International Journal of Mathematics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47350070","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

COMPUTATIONAL TURBULENT COMBUSTION IN THE AGE OF ARTIFICIAL INTELLIGENCE AND QUANTUM INFORMATION 人工智能与量子信息时代的计算湍流燃烧

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.01

Givi Payman

引用次数: 0

ON THE PHYSICAL BEHAVIOURS OF THE CONFORMABLE FRACTIONAL MODIFIED CAMASSA– HOLM EQUATION USING TWO EFFICIENT METHODS 用两种有效方法研究可调分数阶修正camassa - holm方程的物理行为

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.03

Berfin Elma, E. Mısırlı

{"title":"ON THE PHYSICAL BEHAVIOURS OF THE CONFORMABLE FRACTIONAL MODIFIED CAMASSA– HOLM EQUATION USING TWO EFFICIENT METHODS","authors":"Berfin Elma, E. Mısırlı","doi":"10.26577/ijmph.2021.v12.i1.03","DOIUrl":"https://doi.org/10.26577/ijmph.2021.v12.i1.03","url":null,"abstract":"In recent years, many authors have researched about fractional partial differential equations. Physical phenomena, which arise in engineering and applied science, can be defined more accurately by using FPDEs. Thus, obtaining exact solutions of the FPDEs equations have become more important to understand physical problems. In this article, we have reached the new traveling wave solutions of the conformable fractional modified Camassa – Holm equation via two efficient methods such as first integral method and the functional variable method. The wave transformation and conformable fractional derivative have been used to convert FPDE to the ordinary differential equation. The Camassa – Holm equation is physical model of shallow water waves with non-hydrostatic pressure. Thanks to these powerful methods, some comparisons, such as type of solutions and physical behaviours, have been made. Additionally, mathematica program have been used with the aim of checking of solutions. Investigating results of the fractional differential equations can help understanding complex phenomena in applied mathematics and physics.","PeriodicalId":40756,"journal":{"name":"International Journal of Mathematics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45921159","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

STUDY OF THE MECHANICAL PROPERTIES OF INDUSTRIAL PLEXIGLAS TESTING FOR FLAT STRAIGHT BENDING 工业有机玻璃平直弯曲力学性能试验研究

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.012

A. Kupchishin, V. Lisitsyn, M. Niyazov, D. Utepova

引用次数: 1

NUMERICAL SIMULATION OF BOILING LIQUID OUTFLOWS PROCESS 沸腾液体流出过程的数值模拟

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.06

S. Maussumbekova, A. Duysenali

引用次数: 0

STRUCTURE OF RESONANCE STATES IN THE SIMPLE SCHEMATIC MODEL 简单原理图模型中共振态的结构

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.07

M. Odsuren, G. Khuukhenkhuu, S. Davaa, K. Katō

引用次数: 0

INTEGRAL BVP FOR SINGULARLY PERTURBED SYSTEM OF DIFFERENTIAL EQUATIONS 奇摄动微分方程组的积分BVP

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.04

K. Konisbayeva, M. Dauylbayev, N. R. Tortbay

{"title":"INTEGRAL BVP FOR SINGULARLY PERTURBED SYSTEM OF DIFFERENTIAL EQUATIONS","authors":"K. Konisbayeva, M. Dauylbayev, N. R. Tortbay","doi":"10.26577/ijmph.2021.v12.i1.04","DOIUrl":"https://doi.org/10.26577/ijmph.2021.v12.i1.04","url":null,"abstract":"The article presents a two-point integral BVP for singularly perturbed systems of linear ordinary differential equations. The integral BVP for singularly perturbed systems of ordinary differential equations previously has not been considered. The paper shows the influence of nonlocal boundary conditions on the asymptotics of the solution of the regarded BVP and the significanteffect of integral terms in the definition of the limiting BVP. An explicit constructive formula for the solution of this BVP using initial and boundary functions of the homogeneous perturbed equation is obtained. A theorem on asymptotic estimates of the solution and its derivatives is given. It is established that the solution of the integral BVP at the point is infinitely large as .From here, it follows that the solution of the considered boundary value problem has an initial jump of zero order. It is found that the solution of the original integral BVP is not close to the solution of the usual limiting unperturbed BVP. A changed limiting BVP is obtained. The presence of integrals in the boundary conditions leads to the fact that the limiting BVP is determined by the changed boundary conditions. This follows from the presence of the jump and its order. A theorem on the close between the solutions of the original perturbed and changed limiting problems is given.","PeriodicalId":40756,"journal":{"name":"International Journal of Mathematics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49486152","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

Definition of physical parameters of 8 X-class solar flares 8个x级太阳耀斑的物理参数定义

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.08

S. Maftunzada

{"title":"Definition of physical parameters of 8 X-class solar flares","authors":"S. Maftunzada","doi":"10.26577/ijmph.2021.v12.i1.08","DOIUrl":"https://doi.org/10.26577/ijmph.2021.v12.i1.08","url":null,"abstract":"We observed top 8 X-class solar flares registered in the period May 1998 – May 2015. We measure physical parameters of 8 solar flares, such as the temporal scale, size, and magnetic flux density, and find that the sizes of flares tend to be distributed more broadly as the GOES class becomes weaker and that there is a lower limit of magnetic flux density that depends on the GOES class. We also made a brief analysis of solar flares registered in these days, also has shown the duration of time and peak of solar flares in Universal time. We have identified several physical quantities of solar flares and estimated reconnection rate of solar flares. To determine the physical parameters we used images taken with the AIA instrument on board SDO satellite at wavelengths 131 A, 174 A, 193 A, 211 A, 335 A, 1600 A, 1700 A, 4500 A, SXT - pictures, HMI Magnetogram, SOLIS Chromospheric Magnetogram, GOES XRT-data. Using the observed values, we calculate reconnection inflow velocity, coronal Alfven velocity, and reconnection rate. The inflow velocities vary from a few kilometers per second to several tens of kilometers per second, and the Alfven velocities in the corona are in the range of 103 to 104 kilometers per second. As a result, the rate of reconnection is 10-3. We find that the reconnection rate in a flare tends to decrease as the GOES class of the flare increases.","PeriodicalId":40756,"journal":{"name":"International Journal of Mathematics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43038503","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

Energy-Efficient Operation of PV-T Solar Collectors with Heat Pump based Water Heaters Suitable for Domestic Applications 适用于家用热泵热水器的PV-T太阳能集热器的节能运行

International Journal of Mathematics and Physics Pub Date : 2021-06-01 DOI: 10.26577/ijmph.2021.v12.i1.02

A. James, S. Jayaraj, M. Srinivas, M. Mohanraj

{"title":"Energy-Efficient Operation of PV-T Solar Collectors with Heat Pump based Water Heaters Suitable for Domestic Applications","authors":"A. James, S. Jayaraj, M. Srinivas, M. Mohanraj","doi":"10.26577/ijmph.2021.v12.i1.02","DOIUrl":"https://doi.org/10.26577/ijmph.2021.v12.i1.02","url":null,"abstract":"A photovoltaic-thermal (PV-T) hybrid collector evaporator was designed and developed to produce electrical energy and extract thermal energy simultaneously from the panel using the refrigerant circulated the evaporator tubes. The refrigerant absorbs the heat from photovoltaic panels during its phase change from liquid to vapour. The PV-T evaporators deliver both electricity and heat outputs. An R-32 refrigerant-based solar-assisted heat pump water heating system with a rated heat output of 4 kW was developed and tested its performance for producing 150-200 litres of hot water at an average temperature of 60oC. The R-32 refrigerant is selected because it does not have any ozone depletion potential (ODP), and possess very low global warming potential (GWP). The heat pump evaporator was designed to absorb 3.25 kW heat from the panel and maintains the panel below 30oC. The average PV electricity output was 6 kWh, and the requirement was 3.5 kWh. The average excess power of 2.5 kWh has been supplied to the grid, and the average coefficient of performance (COP) of the system was 6.3. For a life span of 25 years, the total equivalent warming impact analysis (TEWI) resulted in a CO2 value of 15,543 kg, which is very much lower than that of conventional systems. The economic analysis performed was reported, and the system is found to be quite suitable for domestic applications and also economically feasible with a payback period of 2.5 years. \u0000Keywords: Solar PV-T Collectors, VFD Compressor, Domestic Water Heating.","PeriodicalId":40756,"journal":{"name":"International Journal of Mathematics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46614056","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