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ALTERNATIVE VIEW ON BLOOD AND BLOOD PLASMA IN THE VASCULATURE 血液和血浆在脉管系统中的另一种观点
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-03-03 DOI: 10.1134/S0021894422060050
U. Windberger, L. Noirez
{"title":"ALTERNATIVE VIEW ON BLOOD AND BLOOD PLASMA IN THE VASCULATURE","authors":"U. Windberger,&nbsp;L. Noirez","doi":"10.1134/S0021894422060050","DOIUrl":"10.1134/S0021894422060050","url":null,"abstract":"<p>Results of an experimental study of blood properties are reported. To approach the boundary conditions of blood biophysics in a real flow, the viscoelastic measurements are carried out on surfaces coated with a 10-nm thick fibrous layer composed of extracellular matrix protein. For native whole blood, a plateau of the shear elastic modulus as a function of frequency is observed. The immediate consequence of the shear elasticity is that it is necessary to exceed the stress threshold so that blood can flow. This elastic threshold depends on the boundary conditions.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 6","pages":"950 - 956"},"PeriodicalIF":0.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4133720","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
THERMAL BOUNDARY EFFECT ON THE HEAT TRANSFER PERFORMANCE OF A RIBBED COOLING CHANNEL WITH INTERSECTING RIBS 热边界效应对交叉肋肋冷却通道传热性能的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-03-03 DOI: 10.1134/S0021894422060074
C. Zhang, W. W. Wang, Z. T. Tong
{"title":"THERMAL BOUNDARY EFFECT ON THE HEAT TRANSFER PERFORMANCE OF A RIBBED COOLING CHANNEL WITH INTERSECTING RIBS","authors":"C. Zhang,&nbsp;W. W. Wang,&nbsp;Z. T. Tong","doi":"10.1134/S0021894422060074","DOIUrl":"10.1134/S0021894422060074","url":null,"abstract":"<p>The current study focuses on the influence of thermal boundary conditions, especially for a ribbed cooling channel with two intersecting ribs. Numerical studies are carried out for the Reynolds number of 30000 under two kinds of thermal boundary conditions, i.e., the constant wall temperature condition and the uniform heat flux condition. The local normalized Nusselt number distributions and area-averaged values are compared and further analyzed. The thermal boundary type and value both affect the heat transfer performance. The uniform heat flux condition always yields higher heat transfer than the constant wall temperature condition. A correlation for the wall-to-coolant temperature ratio is obtained and compared with previously published correlations.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 6","pages":"963 - 971"},"PeriodicalIF":0.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4476586","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
INTERNAL WAVES IN TWO-LAYER STRATIFIED FLOWS 两层分层流中的内波
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-03-03 DOI: 10.1134/S0021894422060153
N. I. Makarenko, J. L. Maltseva, A. A. Cherevko
{"title":"INTERNAL WAVES IN TWO-LAYER STRATIFIED FLOWS","authors":"N. I. Makarenko,&nbsp;J. L. Maltseva,&nbsp;A. A. Cherevko","doi":"10.1134/S0021894422060153","DOIUrl":"10.1134/S0021894422060153","url":null,"abstract":"<p>This paper deals with a problem of internal waves in a two-layer stratified fluid with a density that depends exponentially on the depth inside the layers and has a jump at the interface. The equation of second-order long-wave approximation, which describes solitary waves, is derived. The spectral properties of the equations of small perturbations of a horizontal piecewise constant flow are studied, and possible mechanisms for the shear instability of a stratified flow are characterized.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 6","pages":"1022 - 1029"},"PeriodicalIF":0.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4131402","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
INCREASE IN THE PERMEABILITY OF A MICROCAPILLARY WITH WALLS COATED WITH CORRUGATED GRAPHENE FILM 壁涂有波纹石墨烯薄膜的微毛细管的渗透率增加
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-03-03 DOI: 10.1134/S002189442206013X
Yu. V. Pakharukov, F. K. Shabiev, R. F. Safargaliev, A. V. Shabieva
{"title":"INCREASE IN THE PERMEABILITY OF A MICROCAPILLARY WITH WALLS COATED WITH CORRUGATED GRAPHENE FILM","authors":"Yu. V. Pakharukov,&nbsp;F. K. Shabiev,&nbsp;R. F. Safargaliev,&nbsp;A. V. Shabieva","doi":"10.1134/S002189442206013X","DOIUrl":"10.1134/S002189442206013X","url":null,"abstract":"<p>The paper considers the mechanism of reducing the permeability of aqueous graphene suspension through an oil-saturated core sample compared to distilled water. Analysis of experimental data shows that an increase in permeability is due to the formation of corrugated films at the interface between two immiscible fluids during their mutual motion. The appearance of wavy surfaces is the result of Kelvin–Helmholtz instability at the graphene–nanofluid–hydrocarbon interface. It is also shown that the occurrence of instability is possible only in the presence of a transition layer—graphene film.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 6","pages":"1005 - 1009"},"PeriodicalIF":0.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4131410","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
PERIODIC CONTACT PROBLEMS FOR A TRANSVERSALLY ISOTROPIC LAYER 横向各向同性层的周期性接触问题
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-03-03 DOI: 10.1134/S0021894422060207
D. A. Pozharskii, N. B. Zolotov
{"title":"PERIODIC CONTACT PROBLEMS FOR A TRANSVERSALLY ISOTROPIC LAYER","authors":"D. A. Pozharskii,&nbsp;N. B. Zolotov","doi":"10.1134/S0021894422060207","DOIUrl":"10.1134/S0021894422060207","url":null,"abstract":"<p>This paper describes three-dimensional periodic contact problems of infinite straight chains of punches acting on the face of a transversally isotropic elastic layer, whose other face is subject to sliding support. Isotropy planes are parallel or perpendicular to the layer faces. Contact problems are solved using the method of nonlinear boundary integral equations, which makes it possible to simultaneously determine the contact region and contact pressures. Calculations for known transversally isotropic materials are performed.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 6","pages":"1065 - 1072"},"PeriodicalIF":0.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4477488","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
OPERATING PRESSURE IMPACT ON THE FLAME RESPONSE IN TURBO ENGINE COMBUSTORS 工作压力对涡轮发动机燃烧室火焰响应的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-03-03 DOI: 10.1134/S0021894422060037
F. Gh. Mangodeh, A. M. Tahsini
{"title":"OPERATING PRESSURE IMPACT ON THE FLAME RESPONSE IN TURBO ENGINE COMBUSTORS","authors":"F. Gh. Mangodeh,&nbsp;A. M. Tahsini","doi":"10.1134/S0021894422060037","DOIUrl":"10.1134/S0021894422060037","url":null,"abstract":"<p>In the present study, the effect of operating pressure on the flame response is investigated numerically, and the validity of atmospheric tests is examined. The results show that the flame shape significantly varies at atmospheric pressure, and the flame response to imposed pressure fluctuations is changed; therefore, atmospheric test stands are not reliable enough to study the combustion instability.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 6","pages":"931 - 939"},"PeriodicalIF":0.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4131421","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
MODELING THE DEFORMATION OF MULTIMODULUS MATERIALS WITH A SOLIDIFIED FOAM STRUCTURE 具有固化泡沫结构的多模量材料的变形建模
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-03-03 DOI: 10.1134/S0021894422060219
M. A. Legan, A. V. Miroshnichenko
{"title":"MODELING THE DEFORMATION OF MULTIMODULUS MATERIALS WITH A SOLIDIFIED FOAM STRUCTURE","authors":"M. A. Legan,&nbsp;A. V. Miroshnichenko","doi":"10.1134/S0021894422060219","DOIUrl":"10.1134/S0021894422060219","url":null,"abstract":"<p>The structure of foam materials is analyzed. It is noted that foam materials have different strain diagrams in uniaxial tension and compression. A simplified physical model in the form of a steel ring is proposed for multimodulus foam materials. The model was tested on a Walter + Bai AG LFM-L-1 testing machine. The deformation of the model was analyzed using the ANSYS Workbench software package taking into account the contact interaction between the elements of the model. The calculation results were compared with experimental data.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 6","pages":"1073 - 1077"},"PeriodicalIF":0.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4132202","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: 1
LOCAL EQUILIBRIUM APPROXIMATION IN THE MATHEMATICAL MODEL OF THE FAR TURBULENT WAKE BEHIND A BODY OF REVOLUTION 旋转体后远湍流尾迹数学模型中的局部平衡近似
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-02-06 DOI: 10.1134/S002189442205011X
V. N. Grebenev, A. G. Demenkov, G. G. Chernykh
{"title":"LOCAL EQUILIBRIUM APPROXIMATION IN THE MATHEMATICAL MODEL OF THE FAR TURBULENT WAKE BEHIND A BODY OF REVOLUTION","authors":"V. N. Grebenev,&nbsp;A. G. Demenkov,&nbsp;G. G. Chernykh","doi":"10.1134/S002189442205011X","DOIUrl":"10.1134/S002189442205011X","url":null,"abstract":"<p>The flow in the far turbulent wake behind a body of revolution is studied with the use of a three-parameter turbulence model, which includes differential equations of the turbulent energy balance, transfer equation for the turbulent energy dissipation rate, and turbulent shear stress equation. Local equilibrium algebraic truncation of the transfer equation for the turbulent shear stress yields the known Kolmogorov–Prandtl relation. Under a certain restriction on the values of the empirical constants and for the law of time scale growth consistent with the mathematical model, this relation is a differential constraint of the model or an invariant manifold in the phase space of the corresponding dynamic system. The equivalence of the local equilibrium approximation and the condition of the zero value of Poisson’s bracket for the normalized turbulent diffusion coefficient and defect of the averaged streamwise component of velocity is demonstrated. Results of numerical experiments are reported; they are found to be in good agreement with theoretical predictions.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 5","pages":"825 - 832"},"PeriodicalIF":0.6,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4248791","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
AERODYNAMIC FEATURES OF A ROTATING CYLINDER WITH A DEFLECTOR 带有偏转板的旋转圆柱体的气动特性
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-02-06 DOI: 10.1134/S0021894422050121
A. R. Bakhtybekova, N. K. Tanasheva, L. L. Minkov, N. N. Shuyushbayeva, A. N. Dyusembaeva
{"title":"AERODYNAMIC FEATURES OF A ROTATING CYLINDER WITH A DEFLECTOR","authors":"A. R. Bakhtybekova,&nbsp;N. K. Tanasheva,&nbsp;L. L. Minkov,&nbsp;N. N. Shuyushbayeva,&nbsp;A. N. Dyusembaeva","doi":"10.1134/S0021894422050121","DOIUrl":"10.1134/S0021894422050121","url":null,"abstract":"<p>Numerical and experimental methods are used to investigate the aerodynamic characteristics of a laboratory model in the form of a cylinder with an active rotating element (deflector) that can be used as a working blade of a wind turbine. Numerical simulation was based on solving the Reynolds-averaged Navier–Stokes equations for the realizable (<span>(k{-}varepsilon)</span>) turbulence model using the Ansys Fluent software. Experimental studies were performed using a laboratory model with a cylinder 205 mm long and 50 mm in diameter and a deflector 100 mm in diameter, which was produced based on the results of the numerical simulation. A comparative analysis of the numerical and experimental aerodynamic characteristics of the model was carried out and the aerodynamic features of the airflow around the test model were identified.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 5","pages":"833 - 842"},"PeriodicalIF":0.6,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4249303","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
INVESTIGATION OF AN OSCILLATORY MULTIPHASE FLOW IN A DOUBLE-POROSITY MEDIUM WITH A REACTIVE SKELETON 具有反应骨架的双重孔隙介质中振荡多相流的研究
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-02-06 DOI: 10.1134/S0021894422050108
S. M. Bazov, I. N. Zavialov, A. V. Konyukhov
{"title":"INVESTIGATION OF AN OSCILLATORY MULTIPHASE FLOW IN A DOUBLE-POROSITY MEDIUM WITH A REACTIVE SKELETON","authors":"S. M. Bazov,&nbsp;I. N. Zavialov,&nbsp;A. V. Konyukhov","doi":"10.1134/S0021894422050108","DOIUrl":"10.1134/S0021894422050108","url":null,"abstract":"<p>The transition of filtration reactive flow in a double-porosity medium into a self-oscillating mode is studied. Flow stability is analyzed using numerical methods for solving multiphase filtration equations in a double-porosity medium. The region of development of self-oscillations is investigated depending on the external parameters of the system and the properties of the reactants.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"63 5","pages":"816 - 824"},"PeriodicalIF":0.6,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4249314","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
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