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EFFECT OF ULTRASONIC CAVITATION ON THE GAS–LIQUID INTERFACE UNDER FORCED AERATION 强制充气条件下超声空化对气液界面的影响
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060075
R.N. Golykh, J.-B. Carrat, V.N. Khmelev, I.A. Manyakhin, V.D. Minakov, D.V. Genne, A.R. Barsukov
{"title":"EFFECT OF ULTRASONIC CAVITATION ON THE GAS–LIQUID INTERFACE UNDER FORCED AERATION","authors":"R.N. Golykh,&nbsp;J.-B. Carrat,&nbsp;V.N. Khmelev,&nbsp;I.A. Manyakhin,&nbsp;V.D. Minakov,&nbsp;D.V. Genne,&nbsp;A.R. Barsukov","doi":"10.1134/S0021894424060075","DOIUrl":"10.1134/S0021894424060075","url":null,"abstract":"<p>A setup for experimental studies of the structure, shape, and size of the gas–liquid interface under ultrasonic exposure and forced aeration has been developed. It has been found that ultrasonic exposure leads to an about 1.5-fold increase in interfacial area during aeration. The ultrasound intensity has been shown to have an optimal value that provides a maximum increase in interfacial area per unit ultrasonic energy input.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1082 - 1095"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849034","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
CONTROL OF CRYSTALLIZATION OF NON-FERROUS METALS BY CHANGING THE PHASES OF THE SUPPLY CURRENTS OF A LINEAR INDUCTION STIRRER 通过改变线性感应搅拌器供电电流的相位来控制有色金属的结晶
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060038
G.L. Losev, A.D. Mamykin
{"title":"CONTROL OF CRYSTALLIZATION OF NON-FERROUS METALS BY CHANGING THE PHASES OF THE SUPPLY CURRENTS OF A LINEAR INDUCTION STIRRER","authors":"G.L. Losev,&nbsp;A.D. Mamykin","doi":"10.1134/S0021894424060038","DOIUrl":"10.1134/S0021894424060038","url":null,"abstract":"<p>Experiments were performed to study the crystallization of a gallium alloy in a vertical flat rectangular cuvette under external electromagnetic influence. The results of the study show that the propagation velocity and shape of the crystallization front can be effectively controlled by changing the power supply parameters of the electromagnetic stirrer. A mode characterized by intense stirring flow and significant inhomogeneity of the crystallization front was selected by varying the amplitude of electromagnetic forces. In this mode, changing the phase angles of the supply currents of the linear induction machine allows a fundamental change in the topology of hydrodynamic melt flows at a constant power supply of the stirrer. This, in turn, leads to a change in heat and mass transfer characteristics and hence the conditions in the interfacial region, making it possible to indirectly control the homogeneity of the crystallization front and, to a lesser extent, the phase transition rate. The contribution of convection to flow formation and its influence on the crystallization process have been studied. In particular, it has been shown that thermal convection can lead to the formation of additional vortex structures near heat exchangers, which prevents metal crystallization.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1030 - 1042"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848889","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
ENTRAINMENT OF AIR IN AN OBLIQUE HIGH-VELOCITY IMPACT OF A SMALL SOLID SPHERE ONTO THE LIQUID SURFACE 夹带：小的固体球体在斜向高速撞击液体表面时夹带的空气
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060099
A.V. Cherdantsev, A.Z. Kvon, N.V. Gavrilov, E.V. Ermanyuk
{"title":"ENTRAINMENT OF AIR IN AN OBLIQUE HIGH-VELOCITY IMPACT OF A SMALL SOLID SPHERE ONTO THE LIQUID SURFACE","authors":"A.V. Cherdantsev,&nbsp;A.Z. Kvon,&nbsp;N.V. Gavrilov,&nbsp;E.V. Ermanyuk","doi":"10.1134/S0021894424060099","DOIUrl":"10.1134/S0021894424060099","url":null,"abstract":"<p>Results of studying an oblique impact of heavy solid spheres 6 mm in diameter onto an undisturbed surface of water by the method of high-speed visualization are reported. The dynamics of interaction of the body with the liquid in the cases of sphere ricochet and immersion is compared. It is found that air bubbles are intensely captured in the wake behind the body in situations with body immersion owing to a collision of the edges of the “crown\" generated at the cavity boundaries and to formation of a jet penetrating through the cavity bottom and entraining air bubbles. The effects of the sphere material density and of the impact velocity and angle on the scenario of sphere-liquid interaction are studied. Comparisons with previous experiments show that a decrease in the sphere size leads to reduction of the critical angle, while the opposite effect (increase in the critical angle) is observed if the impact velocity is increased. Such effects cannot be explained by theoretical approaches developed earlier for impacts of large spheres because these approaches ignore the dynamics of the liquid jet generated ahead of the body and the changes in the flow pattern as a whole.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1109 - 1118"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849036","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
UNCERTAINTY OF BOUNDARY CONDITIONS AND MATERIAL MODEL FOR PRE-OPERATIVE HEMODYNAMICS: CLINICAL CASE OF A RUPTURED CEREBRAL FUSIFORM ANEURYSM 术前血流动力学边界条件和材料模型的不确定性：脑梭状动脉瘤破裂1例
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060105
Yu.O. Kuyanova, A.K. Khe, K.S. Ovsyannikov, A.V. Dubovoi, A.P. Chupakhin, D.V. Parshin
{"title":"UNCERTAINTY OF BOUNDARY CONDITIONS AND MATERIAL MODEL FOR PRE-OPERATIVE HEMODYNAMICS: CLINICAL CASE OF A RUPTURED CEREBRAL FUSIFORM ANEURYSM","authors":"Yu.O. Kuyanova,&nbsp;A.K. Khe,&nbsp;K.S. Ovsyannikov,&nbsp;A.V. Dubovoi,&nbsp;A.P. Chupakhin,&nbsp;D.V. Parshin","doi":"10.1134/S0021894424060105","DOIUrl":"10.1134/S0021894424060105","url":null,"abstract":"<p>The influence of various individual and phantom boundary conditions on the results pre-operative numerical simulations of hemodynamics of a fusiform aneurysm of cerebral vessels is numerically simulated. It is found that allowance for individual mechanical properties of the aneurysm tissue affects the results of predicting the aneurysm status, but does not affect predicting the rupture zone, which can be detected by using the CFD approach under the assumption of rigid walls with phantom boundary conditions and with the condition of the maximum shear stresses on the wall as a criterion of rupture zone determination.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1119 - 1139"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848956","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
NOVEL DENTAL LOCKING INTERFACE DESIGN FOR MINIMUM STRESS SHIELDING IN DENTAL IMPLANTS AND ITS VALIDATION USING FEM AND ANN 基于最小应力屏蔽的牙锁界面设计及其有限元和神经网络验证
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060130
S. Srivastava, S.K. Sarangi
{"title":"NOVEL DENTAL LOCKING INTERFACE DESIGN FOR MINIMUM STRESS SHIELDING IN DENTAL IMPLANTS AND ITS VALIDATION USING FEM AND ANN","authors":"S. Srivastava,&nbsp;S.K. Sarangi","doi":"10.1134/S0021894424060130","DOIUrl":"10.1134/S0021894424060130","url":null,"abstract":"<p>One of the most important factors determining dental implants’ longevity and effectiveness is the connection between the abutment and the implant. This investigation focuses on studying how bone shielding is affected by the interface between dental implants and abutments. In a computer-aided design (CAD) environment, three dental implant connectors and carbon-reinforced PEEK are modeled. A comparison is made between the modern dental implant locking mechanism and the more traditional internal hexagonal and conical abutment interfaces to evaluate the former’s effectiveness. ANN is employed in the process of developing the precise modulus of the dental implant material for the human jaw. Studying the von Mises stress and deformation of dental interface materials makes it possible to discover a unique locking system that exhibits the highest von Mises stress and deformation, virtually on par with the bone. However, the carbon-reinforced PEEK composite material demonstrates high bone shielding.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1154 - 1168"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848927","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
TABLE OF POSTULATES OF CONTINUUM MECHANICS AND PRINCIPLES OF FORMING ITS ROWS 连续介质力学的基本假设及其行形成原理表
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060154
D.V. Georgievskii
{"title":"TABLE OF POSTULATES OF CONTINUUM MECHANICS AND PRINCIPLES OF FORMING ITS ROWS","authors":"D.V. Georgievskii","doi":"10.1134/S0021894424060154","DOIUrl":"10.1134/S0021894424060154","url":null,"abstract":"<p>The single integral form of the postulates of continuum mechanics written as laws of change (conservation) of certain quantities is represented as a table of postulates. It is assumed that in a continuous medium, both purely mechanical and various non-mechanical interactions occur, which are described by scalar, vector, and second-rank tensor energetically conjugate pairs of quantities, one of which characterizes a process and the other defines the response of the environment to this process. The first three rows of the table of postulates are used to construct the fourth and fifth rows corresponding to the laws of change of internal energy and the quantity that, in the case of the thermodynamic pair “temperature–entropy\" coincides with entropy. It is shown that the assignment of sources, fluxes through the boundary, and productions in the fourth and fifth rows of the table of postulates actually makes these rows definitions. The principles used in nonisothermal mechanics to construct constitutive relations linking dependent and independent state variables for each type of interaction are generalized.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1182 - 1188"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848929","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
JOULE HEATING OF A SHAPED-CHARGE JET FORMED BY THE COLLAPSE OF A CONICAL METAL LINER IN A MAGNETIC FIELD 锥形金属衬里在磁场中坍缩形成的聚能射流的焦耳加热
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060014
S.V. Stankevich, G.A. Shvetsov
{"title":"JOULE HEATING OF A SHAPED-CHARGE JET FORMED BY THE COLLAPSE OF A CONICAL METAL LINER IN A MAGNETIC FIELD","authors":"S.V. Stankevich,&nbsp;G.A. Shvetsov","doi":"10.1134/S0021894424060014","DOIUrl":"10.1134/S0021894424060014","url":null,"abstract":"<p>This paper presents the results of numerical simulation of magnetic field cumulation and the Joule heating of shaped-charge jets produced by explosive compression of a metal cone in which a magnetic field was pre-generated. The problem is considered in a two-dimensional axisymmetric non-stationary formulation. The finite electrical conductivity of the cone material is taken into account, and various methods of generating the initial magnetic field (using one or two solenoids) are considered. It is found that that during cone compression, the magnetic field induction can increase several hundred-fold. For a relatively low initial magnetic field induction on the cone axis (<span>(0.09{-}0.17)</span> T), the temperature increase near the axis of the shaped-charge jet due to heating by eddy currents is <span>(200{-}300)</span>°C. This heating can be accompanied by thermal softening of the shaped-charge jet material and an increase in its ultimate elongation and hence penetration capability.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1011 - 1020"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849030","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
MATHEMATICAL MODELING OF TEMPERATURE EFFECT ON PLASMA TRANSPORT IN A HELICAL MAGNETIC FIELD 螺旋磁场中温度对等离子体输运影响的数学模型
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060026
G.G. Lazareva, I.P. Oksogoeva, A.V. Sudnikov
{"title":"MATHEMATICAL MODELING OF TEMPERATURE EFFECT ON PLASMA TRANSPORT IN A HELICAL MAGNETIC FIELD","authors":"G.G. Lazareva,&nbsp;I.P. Oksogoeva,&nbsp;A.V. Sudnikov","doi":"10.1134/S0021894424060026","DOIUrl":"10.1134/S0021894424060026","url":null,"abstract":"<p>This paper presents preliminary results of refinement of the mathematical model of plasma transport in a helical open magnetic trap (SMOLA). Plasma is contained in the device by transferring a magnetic field pulse with helical symmetry to the rotating plasma. The mathematical model is based on the stationary equation of plasma transport. The paper presents a method for taking into account the effect of the model coefficients using additional information. The calculated dependence of temperature on coordinates is obtained, which qualitatively agrees with the experimental data. Ordinary differential equations are obtained, which follow from the original model and can be used to refine the coefficients. The mathematical model is developed to predict the plasma confinement parameters in devices with a spiral magnetic field.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1021 - 1029"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849031","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 OF BOTTOM-HOLE PRESSURE DYNAMICS IN A SLANTED WELL 斜井井底压力动态模型
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060087
R.R. Urazov, O.V. Akhmetova, I.I. Gallyamitdinov, A.Ya Davletbaev, V.V. Sarapulova, A.V. Pestrikov
{"title":"MODELING OF BOTTOM-HOLE PRESSURE DYNAMICS IN A SLANTED WELL","authors":"R.R. Urazov,&nbsp;O.V. Akhmetova,&nbsp;I.I. Gallyamitdinov,&nbsp;A.Ya Davletbaev,&nbsp;V.V. Sarapulova,&nbsp;A.V. Pestrikov","doi":"10.1134/S0021894424060087","DOIUrl":"10.1134/S0021894424060087","url":null,"abstract":"<p>The paper presents solutions to problems of nonstationary filtration to an imperfect well with an arbitrary angle of inclination from the vertical, allowing for the interpretation of data based on pressure transient test and production forecasting. Solutions are obtained for various conditions on the top and bottom of the reservoir, while two algorithms are implemented to describe the bottom-hole pressure: a multi-segment and a single-segment algorithm with the determination of an equal pressure point. A computational experiment shows that the calculation results obtained using single- and multi-segment algorithms are in good agreement.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1096 - 1108"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849035","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
MULTI-BRANCH HYSTERESIS OF STATES OF A SESSILE DROPLET ON A CYCLICALLY STRETCHED ELASTIC SUBSTRATE 在循环拉伸弹性基底上的液滴状态的多分支迟滞
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060051
V.A. Dekhtyar, A.E. Dubinov
{"title":"MULTI-BRANCH HYSTERESIS OF STATES OF A SESSILE DROPLET ON A CYCLICALLY STRETCHED ELASTIC SUBSTRATE","authors":"V.A. Dekhtyar,&nbsp;A.E. Dubinov","doi":"10.1134/S0021894424060051","DOIUrl":"10.1134/S0021894424060051","url":null,"abstract":"<p>The states of liquid albumin droplets sitting on a non-wetting horizontal elastic substrate which was first cyclically stretched and then relaxed have been studied experimentally. Multi-branch hysteresis of droplet states has been found. The number of hysteresis branches can be varied by changing the law of motion of the substrate.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1066 - 1070"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849032","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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